Journal articles: 'Hydroponic greenhouse'

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Arif Supriyanto and Fathurrahmani Fathurrahmani. "The prototype of the Greenhouse Smart Control and Monitoring System in Hydroponic Plants." Digital Zone: Jurnal Teknologi Informasi dan Komunikasi 10, no. 2 (November 1, 2019): 131–43. http://dx.doi.org/10.31849/digitalzone.v10i2.3265.

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This research helps the farmers to do the humidification control and monitor the condition of hydroponic plants in greenhouses in real-time. When it comes to watching the hydroponic plants in greenhouses, the farmers usually experience difficulties because they still do it manually. Activities such as checking the temperature, air humidity, and also water quality in hydroponic plants by coming directly to the greenhouse are still ineffective. Therefore this research aims to make a smart greenhouse prototype for hydroponic plants. Smart greenhouse hardware was built based on the Arduino microcontroller, DHT11 sensor, pH sensor, TDS, DS18b20 temperature, ultrasonic, and esp8266 wifi module. The monitoring system features information on water quality from hydroponic plants and the ability to record farming activities from planting preparation to web-based harvesting. The test results of smart greenhouse monitoring system can display the hydroponic plant conditions and able to do the humidification control with an upper limit of 35 degrees celsius because plant can survive with disease under 35 degrees celsius, with small average offset for the sensor, and an average offset of 1.49 from TDS sensors, with temperature of 0.50 and pH of 0.34. Keywords: Greenhouse, NFT hydroponics, Humidification, Monitoring System, Arduino

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Tatas, Konstantinos, Ahmad Al-Zoubi, Nicholas Christofides, Chrysostomos Zannettis, Michael Chrysostomou, Stavros Panteli, and Anthony Antoniou. "Reliable IoT-Based Monitoring and Control of Hydroponic Systems." Technologies 10, no. 1 (February 2, 2022): 26. http://dx.doi.org/10.3390/technologies10010026.

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This paper presents the design and implementation of iPONICS: an intelligent, low-cost IoT-based control and monitoring system for hydroponics greenhouses. The system is based on three types of sensor nodes. The main (master) node is responsible for controlling the pump, monitoring the quality of the water in the greenhouse and aggregating and transmitting the data from the slave nodes. Environment sensing slave nodes monitor the ambient conditions in the greenhouse and transmit the data to the main node. Security nodes monitor activity (movement in the area). The system monitors water quality and greenhouse temperature and humidity, ensuring that crops grow under optimal conditions according to hydroponics guidelines. Remote monitoring for the greenhouse keepers is facilitated by monitoring these parameters via connecting to a website. An innovative fuzzy inference engine determines the plant irrigation duration. The system is optimized for low power consumption in order to facilitate off-grid operation. Preliminary reliability analysis indicates that the system can tolerate various transient faults without requiring intervention.

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Zhuravleva, L. A. "GREENHOUSES WITH NARROW-RACK HYDROPONICS TECHNOLOGY BASED ON DIGITAL CONTROL SYSTEMS." Scientific Life 15, no. 9 (September 30, 2020): 1195–203. http://dx.doi.org/10.35679/1991-9476-2020-15-7-1195-1203.

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Currently, many foreign greenhouse manufacturers use elements of digital technologies and hydroponics systems. Almost all manufacturers of systems and equipment in this class are foreign companies. Work on creating modern domestic digital controlled systems for growing agricultural crops is relevant and in demand in Russia. The Moscow Polytechnic University conducts studies and development research aimed at creating software and intelligent technologies for controlling and regulating the microclimate in greenhouses and hydroponic installations. Based on mathematical models of the microclimate systems for complete automation of plants growing process and automatic maintenance of optimal microclimate parameters, remotely using a phone or tablet PC, have been designed and implemented. The article presents a mathematical model of the greenhouse microclimate. One of the most promising directions is considered; it is a technology of multi-level shelving and narrow-shelving hydroponics. A functional diagram of the greenhouse microclimate control is given. This method allows to increase the used volume of greenhouses up to 25-30 pcs. plants per 1 sq. m of greenhouse area, the number of crop rotations up to 4-5 per year. Reducing water and nutrient solution consumption per unit of production by 2.0-2.5 times compared to drip irrigation greenhouses is provided. The amount of soil in comparison with low-volume substrate technology with drip irrigation is reduction by 4-6 times. The amount of nitrates in products is reduced by 8-10 times compared to the standard. The method of growing agricultural crops does not require much physical effort, unlike traditional crop production. Greenhouses with narrow-rack hydroponics technology based on digital control systems provide an increase in the efficiency of crop production; they are an environmentally friendly technology for growing seedlings, vegetables, berries, flowers and green crops. The technology can be used both in high-tech large-scale industries, agricultural holdings, city farms, and in family businesses on personal plots.

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Walters, Kellie J., and Christopher J. Currey. "Hydroponic Greenhouse Basil Production: Comparing Systems and Cultivars." HortTechnology 25, no. 5 (October 2015): 645–50. http://dx.doi.org/10.21273/horttech.25.5.645.

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Basil (Ocimum sp.) is the most popular fresh culinary herb. However, there is a lack of data characterizing the effect of hydroponic production systems and cultivars on the yield of hydroponically produced basil. Our objectives were to quantify productivity and characterize growth of basil cultivars grown in two hydroponic production systems. Thirty-five basil cultivars, including selections of sweet basil (O. basilicum), holy basil (O. tenuiflorum), and lemon basil (O. ×citriodorum and O. basilicum) were chosen. Seedlings were transplanted into nutrient film technique (NFT) or deep flow technique (DFT) systems and grown for 3 weeks. There was no interaction between basil cultivars and hydroponic production system. Fresh weight of plants grown in DFT systems was 2.6 g greater compared with plants grown in NFT systems. Basil cultivars differed greatly in fresh weight. In general, holy, lemon, and sweet basil cultivars produce moderate to high fresh weight, but vary greatly. Dissimilarly, bush (O. basilicum var. minimum), cinnamon (O. basilicum), large-leaf (O. basilicum), and thai basils (O. basilicum var. thyrisiflorum) produce moderate fresh weight and purple basil (O. basilicum) cultivars produce the least fresh weight. The yield of basil seems to be affected more by cultivar selection than hydroponic production system. Therefore, hydroponic basil producers should select basil cultivars based on flavor and yield, while hydroponic systems should be selected based on operational preferences.

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Pinchuk, E. V., L. V. Bespalko, E. G. Kozar, I. T. Balashova, S. M. Sirota, and T. E. Shevchenko. "VALUABLE VEGETABLE GREEN ON HYDROPONICS FOR SEASONAL USE." Vegetable crops of Russia, no. 3 (June 14, 2019): 45–53. http://dx.doi.org/10.18619/2072-9146-2019-3-45-53.

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The regular inclusion of green vegetables in the diet is beneficial to human. In Russia the main time manufacture and consumption of fresh vegetable production falls in the June-October. Seasonality of consumption of vegetables may lower the conveyor production using secure ground, as well as the introduction of a larger number of species in the production of vegetable crops. One of the priority directions of the development of greenhouse vegetable production is the introduction of hydroponic technologies, including longline. In Federal Scientific Vegetable Center has passed the test of cultivars of lettuce, rocket salad, mustard leaf and watercress breeding laboratory of green and spicy taste cultures on multi-level narrow column hydroponics (MUG). It is shown that when grown on the installation of MUG, it is possible to obtain ecologically safe and valuable spicyflavoring and salad green products. The studied varieties are looking not only for growing hydroponic salad lines, but for multi-level narrow column hydroponics (vertical vegetable growing) during the off-season. The studied varieties are promising not only for growing on hydroponic salad lines, but for multi-level narrow column hydroponics (vertical vegetable growing) during the off-season.

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Ngosong, Christopher, Moshe T. Halpern, Joann K. Whalen, and Donald L. Smith. "Purslane (Portulaca oleracea L.) has potential for desalinizing greenhouse recirculation water." Canadian Journal of Plant Science 93, no. 5 (September 2013): 961–64. http://dx.doi.org/10.4141/cjps2012-271.

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Ngosong, C., Halpern, M. T., Whalen, J. K. and Smith, D. L. 2013. Purslane ( Portulaca oleracea L.) has potential for desalinizing greenhouse recirculation water. Can. J. Plant Sci. 93: 961–964. Recirculating fertigation solutions improves the environmental sustainability of hydroponics-based vegetable production in Canada. Purslane is an edible halophyte with proported medicinal benefits that could absorb excess salts from recirculation water. It grew well in hydroponic solutions with up to 1000 mg NaCl L−1. Greatest Na absorption occurred during earlier vegetative growth.

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Sumarni, Eni, Loekas Soesanto, Noor Farid, and Hanif Nasiatul Baroroh. "POTENSI PERTUMBUHAN PURWOCENG DENGAN TEKNIK IRIGASI TETES, NUTRIENT FILM TECHNIQUE (NFT) DAN PENANAMAN DI LAHAN TERBUKA." Jurnal Litbang Provinsi Jawa Tengah 16, no. 2 (December 1, 2018): 175–81. http://dx.doi.org/10.36762/litbangjateng.v16i2.763.

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The low yield and quality of purwoceng on conventional planting in open land can be overcome by the application of hydroponic technology in the greenhouse. Hydroponic technology in greenhouses allows controlled control of plants, more planned harvests and reduces pests and diseases. The results of a hydroponic purwoceng production study using drip and NFT irrigation techniques have been carried out separately. The results of the purwoceng production study using the hydroponic nutrient film technique (NFT) show that purwoceng is sensitive to circulating water. Withered purwoceng plants in the NFT system reach 40%. further studies are needed on the hydroponic technique of drip irrigation, NFT and in open land on the growth and development of purwoceng plants. The purpose of the research was to get the effect of drip irrigation, NFT and open land on the growth of plant height and the number of branches of purwoceng plants in the dry season. Experiment using a completely randomized design (CRD) with 3 replications. The micro-climate inside and outside the greenhouse observed includes air temperature and air humidity. Growth data were analyzed by F test and continued with DMRT test at 5% level. The growth variables observed included plant height and number of branches. Purwoceng production using drip irrigation systems, NFT systems and open land has different effects on purwoceng growth. Drip irrigation in the greenhouse produces the highest plant height and number of branches compared to the NFT technique and in open land. Purwoceng planting with drip irrigation shows the highest yield, which is 14 branches. The number of branches of purwoceng plants in open land reaches an average of 6.9. The NFT technique produces the lowest (3,9 branches).

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Girma, F., and B. Gebremariam. "Review on Hydroponic Feed Value to Livestock Production." Journal of Scientific and Innovative Research 7, no. 4 (December 30, 2018): 106–9. http://dx.doi.org/10.31254/jsir.2018.7405.

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In agriculture hydroponics is an advanced technology. Hydroponic production is used to guarantee a constant production of high quantity of green forage throughout the year for livestock feed with suitable prices. Therefore, this review aims to review hydroponic feed value on livestock production. Hydroponics is a technique of growing of plants without soil but in water or nutrient rich solution in a greenhouse. This fodder increases up to 20-30cm height consisting of roots, seeds and plants. About 1.50-3.0 liters of water is required to produce one kg of fresh hydroponics fodder in seven days since water can be reused. However, DM content of 11-14% is common for hydroponics maize and yields of 5-6 folds on fresh basis. Since the hydroponics, fodder is more palatable, digestible and nutritious while imparting other health benefits to the animals and improve production performance of livestock. The cost of seed contributes about 90% of the total cost of production of hydroponics maize fodder as compared to conventional which is much lower. Supplementing is 5-10 kg fresh hydroponics maize fodder per cow per day. Digestibility of the nutrients of the ration could increase in milk production (8- 13%) by feeding hydroponics fodder. Hydroponics fodder can be produced by farmers to feed their dairy animals using low cost diet in situations, where conventional green fodder cannot be grown successfully. Therefore, there is a need for more research and development endeavor for better utilization in the future.

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Egilla, Jonathan N., and Isabelle Nyirakabibi. "(212) Influence of Mineral Nutrient Source in NFT System and Temperature on the Yield of Cos Lettuce `Cimmaron'." HortScience 41, no. 4 (July 2006): 1083D—1084. http://dx.doi.org/10.21273/hortsci.41.4.1083d.

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Two-week-old seedlings of cos lettuce (Lactuca sativa L. var. longifolia) `Cimmaron' were transferred into NFT hydroponic troughs in July and Sept. 2005. The crop was grown either in a polyethylene or polycarbonate greenhouse. Mean July temperature and maximum relative humidity (RH) in the two greenhouses were 30.5 and 27.7 °C ± 0.32 °C; 81.3% and 84.7%, respectively. In September, the mean temperature and RH in the same greenhouses were 22.6 °C and 21.9 °C ± 0.30 °C; 95.6% and 99.2%, respectively. Lettuce crop grown with Peters Excel® [15N–5P2O5–15K2O; (Excel)], had higher fresh mass (FM) and dry mass (DM) compared with either Peat-lite®; [15N-16P2O5-17K2O; (Peat-lite)] or All-Purpose Hydroponic Fertilizer® [9N-4P2O5-15 K2O; (All-Purpose)], but lower DM/FM. At harvest, the crop had good market quality, regardless of mineral nutrient source (MNS). MNS significantly (P ≤ 0.05) influenced yield (FM and DM) in September, regardless of greenhouse type. However, in July only Peat-lite caused significant (P < 0.0252) increase in DM, under the higher temperature condition of greenhouse I. This trend suggests that good quality lettuce and sustained yield can be obtained with the soluble fertilizers Excel and Peat-lite, which are not formulated for hydroponic crop production. Furthermore, `Cimmaron' can produce satisfactory yield under relatively high temperature conditions. However, taste panel evaluation and nutrient content analysis of lettuce produced with these various fertilizers are necessary to determine consumer satisfaction.

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Cunha, Samuel Henrique, Amador Eduardo Lima, Alex Mendonça Carvalho, Rubens José Guimarães, Elisa Melo Castro, Mauro Magalhães Faria, and Erico Tadao Teramoto. "Modified hydroponics and phenolic foam as technological innovations in the production of coffee seedlings from cuttings." Semina: Ciências Agrárias 43, no. 1 (January 10, 2022): 351–66. http://dx.doi.org/10.5433/1679-0359.2022v43n1p351.

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Brazilian coffee production represents an important activity in the country’s agricultural sector and, for this reason, it requires innovative technologies for the production of seedlings, which is one of the most important inputs in crop implantation. Thus, plant cloning by cutting, mineral nutrition via modified hydroponics and the use of alternative substrates appear as technological innovations for seedling production. This study evaluated the production of clonal coffee seedlings in a modified hydroponic system in comparison to the conventional climate-controlled greenhouse system, using vermiculite and phenolic foam as alternative substrates. At the end of the experiment, the seedlings were analyzed for growth (height, stem diameter, number of total leaves, leaf area, root area, shoot and root dry matter) and physiological (chlorophyll content and stomatal conductance) characteristics. For the statistical analysis, a completely randomized design was used in a factorial scheme 2 (types of substrate) x 2 (cultivation systems) with six replications and ten plants per plot. The innovative modified hydroponic system leads to a greater growth of coffee seedlings produced by cuttings in tubes with vermiculite compared to those produced in conventional systems. The substrate phenolic foam can be used alternatively in the air-conditioned greenhouse system. However, in the modified hydroponic system, it is not indicated, as it causes total seedling mortality.

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Guitton, Yann, Laurent Legendre, and Lubomír Adamec. "Mineral nutrition in hydroponically-grown Pinguicula." Carnivorous Plant Newsletter 41, no. 1 (March 1, 2012): 8–15. http://dx.doi.org/10.55360/cpn411.yg153.

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Hydroponic cultivation consists of growing plants on inert substrates with liquid mineral nutrient solutions. It has recently become popular for home-growing plants in limited spaces and for large-scale greenhouse production of crop plants. It is also a valuable tool for the scientific investigations of plant mineral nutrition. Despite the importance of mineral nutrition in the carnivorous syndrome, there is no recent report on the potential usefulness of hydroponics as an investigation tool for studying mineral nutrition of carnivorous plants. The goal of this study was to evaluate the growth response of carnivorous plants of the genus Pinguicula on a peat-based and a rockwool-based hydroponic set-ups under various conditions of mineral deficiencies.

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Succop, C. Elizabeth, and Steven E. Newman. "Hydroponic Greenhouse Production of Fresh-market Basil in Colorado." HortScience 32, no. 3 (June 1997): 519B—519. http://dx.doi.org/10.21273/hortsci.32.3.519b.

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Fresh-market basil is becoming a viable greenhouse commodity in Colorado. Marketing pressures and profit advantages also encourage the production of certified organic produce. The research objectives were to determine the length of time basil plants were productive in the greenhouse and to compare the production of fresh-market basil grown with three root zone systems and two fertilizer treatments. The three systems were hydroponic rockwool slab culture, hydroponic perlite raised bed culture, and hydroponic peat/perlite/compost bag culture. The two types of hydroponic fertilizer treatments were an inorganically formulated nutrient solution and an organic solution consisting of fermented poultry compost, hydrolized fish emulsion, and soluble kelp. The plants were harvested once per week and fresh weight was determined. During the 2nd and 3rd months of harvest, productivity from the plants treated with the organic fertilizer was greatest in the perlite system. However, productivity from the plants treated with the traditional fertilizer was greatest in the bag mix and rockwool systems.

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Daniel J. Cantliffe, Nicole L. Shaw, Juan C. Rodriguez, and Peter J. Stoffella. "HYDROPONIC GREENHOUSE PRODUCTION OF SPECIALTY CUCURBIT CROPS." Acta Horticulturae, no. 731 (January 2007): 225–34. http://dx.doi.org/10.17660/actahortic.2007.731.31.

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ITO, T. "THE GREENHOUSE AND HYDROPONIC INDUSTRIES OF JAPAN." Acta Horticulturae, no. 481 (January 1999): 761–64. http://dx.doi.org/10.17660/actahortic.1999.481.94.

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Feng, Wenzhuo, Akira Nukaya, Mamoru Satou, Naoko Fukuta, Yasushi Ishiguro, Haruhisa Suga, and Koji Kageyama. "Use of LAMP Detection to Identify Potential Contamination Sources of Plant-Pathogenic Pythium Species in Hydroponic Culture Systems of Tomato and Eustoma." Plant Disease 102, no. 7 (July 2018): 1357–64. http://dx.doi.org/10.1094/pdis-10-17-1679-re.

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Hydroponic culture systems are subject to high risks of diseases caused by zoosporic plant pathogens. Control is generally difficult because of the rapid spread of zoospores in the nutrient solutions. In Japan, tomato and eustoma, which are cultivated using the D-tray and nutrient film techniques, respectively, are susceptible to diseases caused by Pythium aphanidermatum and P. irregulare. We used loop-mediated isothermal amplification to identify potential contamination sources of these two pathogens by monitoring their presence in the water supply wells, seedling terraces, nutrient solutions, diseased plants, and ground soils of a tomato greenhouse complex and a eustoma greenhouse complex. The results indicated that the pathogens may enter the culture systems from the soils around the greenhouses. Entry most likely occurs when seedlings are moved from the seedling terraces to the greenhouses, and sterilization of the hydroponic systems may not be sufficient. Therefore, monitoring pathogens in the culture systems and ground soils is very important for the management and prevention of these diseases.

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Succop, C. Elizabeth, and Steven E. Newman. "Hydroponic Greenhouse Production of Fresh-market Basil in Colorado." HortScience 33, no. 3 (June 1998): 480f—481. http://dx.doi.org/10.21273/hortsci.33.3.480f.

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Fresh-market basil has become a viable greenhouse commodity in Colorado. Marketing pressures and profit advantages also encourage the production of certified organic produce. The research objectives were to determine the length of time basil plants were productive in the greenhouse and to compare the production of fresh-market basil grown with three root zone systems and two fertilizer treatments. The three systems were hydroponic rockwool slab culture, hydroponic perlite raised bed culture, and hydroponic peat/perlite/compost bag culture. The two types of hydroponic fertilizer treatments were a salt-based formulated nutrient solution and an organic solution consisting of fermented poultry compost, hydrolized fish emulsion, and soluble kelp. The plants were harvested once per week for fresh weight determination. The results from the two runs show greater productivity for the plants in the perlite system as well as the bag mix system when fertilized with the organic fertilizer compared to salt-based fertilizer. However, productivity of the plants in the rockwool system was greater with the salt-based treatment compared to the organic treatment.

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Kurniawan, Lutfi Athanuzul, and Amirullah Amirullah. "Monitoring and Controlling of pH Levels and Plant Nutrition Supplied by Standalone Photovoltaic in a Greenhouse Hydroponic System using Arduino Uno." ELKHA 13, no. 1 (April 20, 2021): 69. http://dx.doi.org/10.26418/elkha.v13i1.45657.

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This paper aims to implement the prototype model to monitor and control the pH levels and nutrition plant (electrical conductivity-EC) supplied by a standalone photovoltaic (PV) module-connected battery (Lithium-Ion) on the greenhouse hydroponic systems. The pH and EC sensors are connected to the Arduino Uno circuit as a relay control to drive four pumps, i.e. the water flow pump, EC pump, pH up pump, and pH down pump. The greenhouse function to control pests and the impact of environmental non-uniformity caused by variation of wind speed, temperature, or sunlight so that hydroponic plants can grow in an appropriate environment. The Arduino Uno circuit with a 20 × 4 liquid crystal display (LCD) order four relays to monitor and control the four pumps of the greenhouse hydroponic system based on the coding which has been programmed previously. The prototype model is able to monitor and control the pH of hydroponic plant water at the level between 6-7 using a pH-up and pH-down sensor. This model is also able to monitor and control nutrition plant water over 1 mS/cm using an EC sensor. Finally, the proposed prototype is able to monitor and control EC and pH level to regulate plant growth in the greenhouse hydroponic system normally and in real-time.

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Snyder, Richard G., A. Brent Rowell, Thomas J. Koske, and R. Allen Straw. "Regionalizing Agent Training with the Greenhouse Tomato Short Course." HortScience 40, no. 4 (July 2005): 1142D—1143. http://dx.doi.org/10.21273/hortsci.40.4.1142d.

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The protocol for agent training has always been for extension specialists to train agents within the same state in each aspect of agriculture. However, with ubiquitous cutbacks among universities, and extension in particular, it is no longer feasible for every state to provide expertise in each field. Consequently, agents cannot receive training in some specialized fields. With a partnership agreement from the USDA Risk Management Agency, the Greenhouse Tomato Short Course in Jackson, Miss., provided training for five to seven agents from each state in the region: Louisiana, Tennessee, Kentucky, and Mississippi. Funding was made available to cover travel expenses, registration, and a resource notebook for 25 agents. As a result, these agents took part in 3 days of intensive training seminars, as well as a 1-day tour of greenhouses. Invited speakers from around the United States spoke to these agents, as well as current and prospective commercial growers from all over the United States. Topics included basics of producing a commercial crop of hydroponic greenhouse tomatoes, budget for establishing and operating a greenhouse business, marketing and promotion, principles of risk management, pest and disease identification and management, grower's point of view, heating, cooling, and ventilation of greenhouses, new technologies, diagnostics, recent research in greenhouse production, and alternative crops (lettuce, peppers, mini-cucumbers, galia melons, baby squash) for the greenhouse. With this training, agents from throughout the south-central region returned to their offices with the skills to assist growers in their counties to succeed in the hydroponic greenhouse tomato business. Complete information on the short course can be found at www.greenhousetomatosc.com.

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Zhai, Zhengli, David L. Ehret, Tom Forge, Tom Helmer, Wei Lin, Martine Dorais, and Athanasios P. Papadopoulos. "Organic Fertilizers for Greenhouse Tomatoes: Productivity and Substrate Microbiology." HortScience 44, no. 3 (June 2009): 800–809. http://dx.doi.org/10.21273/hortsci.44.3.800.

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Organic fertilizer regimens consisting of combinations of composts (yard waste, swine manure, or spent mushroom substrate) and liquid fertilizers (fish- or plant-based) were evaluated against conventional hydroponic fertilizers in two experiments with greenhouse tomatoes grown in peat-based substrate. Crop yield and fruit quality were evaluated and several assays of substrate microbial activity and community profiles (fluorescein diacetate analysis and EcoLog, values, nematode counts) were conducted. Crops grown in 20% to 40% compost (yard waste or yard waste plus swine manure) plus a continuously applied liquid source of organic potassium (K), calcium (Ca), magnesium (Mg), and sulphate (SO4) could not be sustained more than 1 month before nutrient deficiencies became visible. Supplementation with a nitrogen (N)- and phosphorus (P)-containing plant-based liquid fertilizer at the point when plant deficiencies became apparent subsequently produced yields ≈80% that of the hydroponic control. In a second experiment, the proportion of mushroom or yard waste compost was increased to 50% of the mix, and liquid delivery of K, Ca, Mg and SO4 plus either plant-based or fish-based N- and P-containing liquid feeds was started at the date of transplanting. In this case, organic yields equal to that of the hydroponic control (8.5 kg/plant) were observed in some treatments. The most productive organic treatment was the mushroom compost supplemented with a low concentration of the plant-based liquid fertilizer. In general, organic tomatoes had a lower postharvest decay index (better shelf life) than did the hydroponic controls, possibly as an indirect consequence of overall reduced yield in those treatments. High concentrations of both organic liquid feeds resulted in lower yields as a result of treatment-induced fusarium crown and root rot. In contrast to some previous studies, those treatments showing fusarium crown and root rot also had the highest gross microbial activity. Measures of gross microbial activity and numbers of microbivorous nematodes were higher (average of 37% and 6.7 times, respectively) in compost/organic feed treatments than in the hydroponic control. Community physiological profiles of the bacterial populations, on the other hand, did not differ between organic and hydroponic treatments. Nematode populations were significantly correlated with gross microbial activity in the organic treatments.

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Miller, Alexander, Petrus Langenhoven, and Krishna Nemali. "Maximizing Productivity of Greenhouse-grown Hydroponic Lettuce during Winter." HortScience 55, no. 12 (December 2020): 1963–69. http://dx.doi.org/10.21273/hortsci15351-20.

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Operational cost of producing lettuce (Lactuca sativa) during the winter in greenhouses is high in the northern regions of the United States due to the addition of supplemental lighting (SL) and heating. Crop productivity in greenhouses should increase to offset high operational costs and maintain profits. Factors including SL composition, heating efficiency, suitability of production systems (PS), and cultivar performance can affect crop productivity. Research-based information on optimizing the above environmental- and production-related factors is limited. This information is critical for growers to make informed decisions and increase profits during winter hydroponic production. We evaluated the interactive effects of SL composition, solution temperature, PS, and cultivar treatments on lettuce shoot dry weight (SDW, g·m−2) and shoot water content (SWC, %) in a greenhouse maintained at suboptimal air temperature (13.7 °C) using a split-plot design. There were three light treatments (sunlight without SL, sunlight + narrow-spectrum SL at nighttime, and sunlight + full-spectrum SL at nighttime), two solution temperature levels [heated (18.8 °C) and unheated (13.2 °C)], two hydroponic PS [constant flood technique (CFT) and nutrient film technique (NFT)], and eight cultivars included in the study. Results indicated that 1) a narrow-spectrum SL at nighttime in combination with heated solution resulted in maximum SDW of lettuce, 2) the SDW and SWC (major determinant of economic yield) increase between the heated and unheated solution temperature treatments was higher in the CFT than in the NFT, and 3) the positive effects of using heated solution were seen mainly in the green-color cultivars. Our research identified the optimal spectral composition of nighttime SL, tested the positive effects of alternate heating methods using heated solution on plant growth under suboptimal air temperature conditions, compared the suitability of two hydroponic PS for lettuce production, and quantified yield potential of several lettuce cultivars in hydroponic production during winter. Growers can use our research findings to make informed decisions about their investment and to maximize hydroponic lettuce productivity and profits during winter.

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Agustin, Heny, and Indri Indrawan. "Penanaman Hidroponik dan Olahannya Sebagai Pencegahan Berat Badan Kurang di Desa Cibitung Wetan, Pamijahan, Bogor." Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat 7, no. 3 (November 23, 2021): 237–46. http://dx.doi.org/10.29244/agrokreatif.7.3.237-246.

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Trilogi University with the community ‘Kampung Ramah Lingkungan’ (KRL) Seroja Kahuripan have conducted underweight prevention services in Cibitung Wetan Village, Pamijahan, Bogor. This service activity aims to educate importance of nutritious food, train in creating greenhouses and hydroponic installations, cultivate vegetable crops and their processing to increase the food value as prevention of underweight. The method was carried out in several stages: 1) The preparation and coordination; 2) Implementation; and 3) monitoring and evaluation. Based on the data, it was known that 13,69% of children aged 0–23 months are observed with underweight with body weight far below the standard and 34,44% of children are approaching as underweight. Efforts to prevent underweight were carried out by strengthening the identity of partners, the construction of greenhouse and hydroponic installation as well as training in vegetable cultivation carried out by the team so that partners can be independent in providing nutritious food. The yields of vegetables and their processed products in form of nuggets and jerky have provided food value added increasement to partners. As a result, increasement in the number of partner members from 15 to 54 people, the formation of a group logo as identity reinforcement, the construction of greenhouse facilities and hydroponic installations series, increasement of partner’s knowledges and skills in hydroponic cultivation and crops processing, and increasement partner’s awareness of underweight issue. The results of partner’s satisfaction questionnaire showed that 85% were very satisfied with the program and they hoped for sustainable and further fostering.

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Short, T. H., A. El-Attal, and H. M. Keener. "DECISIONS AND RISK FOR HYDROPONIC GREENHOUSE TOMATO PRODUCTION." Acta Horticulturae, no. 491 (May 1999): 325–30. http://dx.doi.org/10.17660/actahortic.1999.491.49.

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Field, S., and M. A. Nichols. "CONTROL OF FRUIT SIZE IN HYDROPONIC GREENHOUSE TOMATOES." Acta Horticulturae, no. 648 (February 2004): 31–37. http://dx.doi.org/10.17660/actahortic.2004.648.4.

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Short, T. H., A. El-Attal, H. M. Keener, and R. P. Fynn. "A DECISION MODEL FOR HYDROPONIC GREENHOUSE TOMATO PRODUCTION." Acta Horticulturae, no. 456 (March 1998): 493–504. http://dx.doi.org/10.17660/actahortic.1998.456.59.

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Keerthana, S. "Automating and Analysing Greenhouse Hydroponic Farms using IOT." International Journal for Research in Applied Science and Engineering Technology 6, no. 3 (March 31, 2018): 3325–29. http://dx.doi.org/10.22214/ijraset.2018.3706.

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Newell, Robert, Lenore Newman, Mathew Dickson, Bill Vanderkooi, Tim Fernback, and Charmaine White. "Hydroponic fodder and greenhouse gas emissions: a potential avenue for climate mitigation strategy and policy development." FACETS 6 (January 1, 2021): 334–57. http://dx.doi.org/10.1139/facets-2020-0066.

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This research explores the potential hydroponic systems have for contributing to climate mitigation in fodder agriculture. Using British Columbia (BC) and Alberta as case studies, the study compares greenhouse gas (GHG) emissions and carbon sequestration potential of hydroponically grown sprouted barley fodder to conventional barley grain fodder. GHG emissions were examined through scenarios that assumed Alberta to be the main barley producer, while exploring different situations of BC and Alberta as consumers, distributed/centralized hydroponic systems, and renewable/nonrenewable energy. Carbon sequestration opportunities were examined through scenarios that explored the land sparing potential of transitioning from conventional to hydroponic barley and shifts from tillage to no-tillage practices. Sensitivity analyses were done to examine how changes in hydroponic seed-to-fodder output and energy consumption affect the systems’ climate mitigation potential. The results indicated that incorporating hydroponic systems into barley production has the potential to reduce GHG emissions, given seed-to-fodder output and energy consumption are maintained at certain levels and the systems are powered by renewable energy. Results also showed that hydroponic farming can provide greater carbon sequestration opportunities than simply shifting to no-tillage farming. The research indicates that hydroponic fodder farming could contribute to climate mitigation objectives if complemented with effective energy and land use policies.

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Nemali, Krishna. "History of Controlled Environment Horticulture: Greenhouses." HortScience 57, no. 2 (February 2022): 239–46. http://dx.doi.org/10.21273/hortsci16160-21.

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Modern greenhouses are intensive farming systems designed to achieve high efficiency and productivity. Plants are produced year-round in greenhouses by maintaining the environment at or near optimum levels regardless of extreme weather conditions. Many scientific discoveries and technological advancements that happened in the past two centuries paved the way for current state-of-the-art greenhouses. These include, but are not limited to, advancements in climate-specific structural designs and glazing materials, and temperature control, artificial lighting, and hydroponic production systems. Greenhouse structures can be broadly grouped into four distinct designs, including tall Venlo greenhouses of the Netherlands, passive solar greenhouses of China, low-cost Parral greenhouses of the Mediterranean region, and gutter-connected polyethylene houses of India and African countries. These designs were developed to suit local climatic conditions and maximize the return on investment. Although glass and rigid plastic options are available for glazing, the development of low-cost and lightweight plastic glazing materials (e.g., polyethylene) enabled widespread growth of the greenhouse industry in the developing world. For temperate regions, supplemental lighting technology is crucial for year-round production. This heavily relies on advancements in electro-lighting during the 19th and 20th centuries. The development of hydroponic production systems for the controlled delivery of nutrients further enhanced crop productivity. This article addresses important historical events, scientific discoveries, and technological improvements related to advancements in these areas.

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Mailani, Fitri, Donny Eros, Jauharry Jauharry, and Mulyanti Roberto Muliantino. "Pendampingan Hidroponik 55 untuk Tumbuh Kembang dengan Usaha Produksi Sayur Sehat dan Menjadi Tujuan Eco-Eduwisata di Cupak Tangah, Padang." Jurnal Warta Pengabdian Andalas 28, no. 1 (March 23, 2021): 1–9. http://dx.doi.org/10.25077/jwa.28.1.1-9.2021.

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The advantages of this hydroponic vegetable product are that it is free of chemical pesticides, the taste of vegetables is crunchy and sweet, clean, environmentally friendly, and affordable. However, the public's knowledge and understanding regarding hydroponic vegetables is still very little and not evenly distributed in all circles, so that marketing is only limited to certain groups. This service aims to assist and assist Hydroponics 55 partners in producing healthy vegetables and developing into an Eco-tourism area. This service activity is planned to last for 3 years (2021-2024). With the following activity plans: 1) designing a green-house in agricultural areas, 2) increasing online and offline promotion and education, 3) submitting a proposal for collaboration with restaurants, cafes, hospitals and supermarkets in the city of Padang, 4) developing Hydroponic 55 businesses, in processing healthy food derived from hydroponic vegetables, 5) developing agricultural areas into Eco-tourism areas. Activities that have been carried out this year include making educational posters and promoting hydroponic vegetables and distributing them through social media, conducting FGDs with stakeholders, inviting speakers regarding greenhouse preparation and providing knowledge dissemination related to marketing tricks and eco-tourism concepts and facilitating partners in develop business licenses in processing healthy food products. The results of this activity are in the form of educational and promotional posters, proposals for making green-houses, proposals for developing healthy food processing and proposals for developing eco-tourism areas.

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Ehret, D. L., and T. Helmer. "A new wood fibre substrate for hydroponic tomato and pepper crops." Canadian Journal of Plant Science 89, no. 6 (November 1, 2009): 1127–32. http://dx.doi.org/10.4141/cjps08183.

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The use of red cedar sawdust as a growing substrate for hydroponic tomato and pepper production was tested by comparison with yellow cedar sawdust and coir. In experiments with 14-d-old transplants, growth inhibition was observed in response to red cedar compared with yellow cedar sawdust. However, growth of plants transplanted at 28 d was better in red cedar than in yellow cedar, and those planted at 38 d were unaffected by sawdust type. Additionally, tomato and pepper plants grown to maturity under conditions similar to commercial production systems showed no negative effects of red cedar on fruit yield or quality when compared with plants grown in either yellow cedar or coir. There were also no differences in plants grown in either new or old red cedar sawdust. The data suggest that western red cedar should be considered as a viable substrate for production of greenhouse vegetable crops. Key words: Western red cedar, tomato, pepper, hydroponics, soilless culture, yellow cedar, coir, greenhouse

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Zapata-Vahos, Isabel Cristina, Felipe Rojas-Rodas, Dorely David, Jaime A. Gutierrez-Monsalve, and Dagoberto Castro-Restrepo. "Comparison of antioxidant contents of green and red leaf lettuce cultured in hydroponic systems under greenhouse, and conventional soil culture." Revista Facultad Nacional de Agronomía Medellín 73, no. 1 (January 1, 2020): 9077–88. http://dx.doi.org/10.15446/rfnam.v73n1.77279.

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Hydroponic technologies have increased the cultivated area under greenhouses covered with UV filter polyethylene film. However, there is a concern about the antioxidant contents of lettuces produced under these systems. In this study, it was compared to the antioxidant contents of green and red leaf lettuces produced in two hydroponic systems in a greenhouse, against the ones produced with the conventional cultivation system by Colombian farmers. The antioxidant analysis revealed significant statistical differences for DPPH and Anthocyanin analyses (P=0) versus all other culture systems. The best results were obtained in the conventional cultivation. Red lettuce obtained the highest value of FRAP (655.3±82.6 mgAAE 100g-1), ABTS (17.8±6.9 mmolTE 100g-1), total phenols (680.2±69.3 mgGAE 100g-1) and anthocyanin (126.2±6.9 mgC3G 100g-1). Green lettuce exhibited the most antioxidant activity of DPPH (20.7±5.6 mmolTE 100g-1). These results suggest a detrimental effect of the greenhouse covered with UV filter polyethylene film in the antioxidant production of lettuce. Finally, red leaf lettuce showed better antioxidant capacity independent of the cultivation system.

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Koch, Matthew J., and Stacy A. Bonos. "Correlation of Three Salinity Tolerance Screening Methods for Cool-season Turfgrasses." HortScience 46, no. 8 (August 2011): 1198–201. http://dx.doi.org/10.21273/hortsci.46.8.1198.

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The identification of turfgrasses with salinity tolerance will be important for the successful implementation of saline irrigation water use on turfgrass sites. Salinity tolerance in turfgrasses has been evaluated using different techniques, including hydroponic and overhead irrigation methods. This study compared turfgrass response and efficiency of three different salinity screening methods: hydroponic, an overhead irrigation greenhouse method, and a field screening method. There was a significant correlation among all three methods for percent green ratings and a significant correlation between the two greenhouse techniques for dry clipping weights, dry shoot weights, and dry root weights. A difference in magnitude was observed between methods. The overhead-irrigated greenhouse and field methods had lower percent green value ratings than the hydroponic method. However, similar rankings among perennial ryegrass clones were found between methods indicating that numerous methods can be used to screen turfgrass germplasm for salinity tolerance with similar results. The cost, time, and available area required and reliability varied depending on the method with the field screening requiring the most area (929 cm2 per plant) and cost ($23.18 per plant) and the hydroponic method requiring the most time (48.3 min per plant). However, these results indicate any of these methods should be sufficient to screen germplasm for salinity tolerance. This information will be useful to plant breeding programs choosing selection methods for germplasm screening.

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Kratky, B. A. "FOUR NON-CIRCULATING, HYDROPONIC METHODS FOR GROWING GREENHOUSE TOMATOES." HortScience 27, no. 6 (June 1992): 592d—592. http://dx.doi.org/10.21273/hortsci.27.6.592d.

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Total salable yields of `Vendor' greenhouse tomatoes produced with 4 non-circulating, hydroponic methods were not significantly different from yields produced with conventional soil bed culture (5.69 kg/plant). Three methods employed a capillary, sub-irrigated system wherein the plant container rested in a shallow, covered, polyethylene-lined tank containing 5 cm of nutrient solution. Plant containers consisted of 7 and 25 liter plastic pots containing a 1 hapuu:2 cinder medium plus 1 and 2 plants, respectively, and rockwool blocks (7.5 × 7.5 × 6.5 cm) resting on larger rockwool blocks (15 × 15 × 7.5 cm). The fourth method consisted of rockwool blocks (7.5 × 7.5 × 6.5 cm) resting on a screen placed in a covered, 20 cm deep, polyethylene-lined tank filled with nutrient solution.

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ADAMS, P. "NUTRITION OF GREENHOUSE VEGETABLES IN NFT AND HYDROPONIC SYSTEMS." Acta Horticulturae, no. 361 (June 1994): 245–57. http://dx.doi.org/10.17660/actahortic.1994.361.23.

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Ronay, Karoly, and Cristian-Dragoş Dumitru. "Hydroponic Greenhouse Energy Supply Based on Renewable Energy Sources." Procedia Technology 19 (2015): 703–7. http://dx.doi.org/10.1016/j.protcy.2015.02.099.

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Khan, Fraz Ahmad. "A Review an Hydroponic Greenhouse Cultivation for Sustainable Agriculture." International Journal of Agriculture, Environment and Food Sciences 2, no. 2 (April 10, 2018): 59–66. http://dx.doi.org/10.31015/jaefs.18010.

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Schnitzler, W. H., and H. Heuberger. "GREENHOUSE BELL PEPPER CULTIVATION IN LOW COST HYDROPONIC SYSTEMS." Acta Horticulturae, no. 548 (March 2001): 43–50. http://dx.doi.org/10.17660/actahortic.2001.548.2.

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37

OROZCO, LEOPOLDO, LETICIA RICO-ROMERO, and EDUARDO F. ESCARTÍN. "Microbiological Profile of Greenhouses in a Farm Producing Hydroponic Tomatoes." Journal of Food Protection 71, no. 1 (January 1, 2008): 60–65. http://dx.doi.org/10.4315/0362-028x-71.1.60.

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Produce, including tomatoes, has been implicated in several outbreaks of foodborne illness. A number of the sources of contamination for produce grown in open fields are known. However, as an alternative agricultural system, hydroponic greenhouses are reasonably expected to reduce some of these sources. The objective of the present study was to determine the microbiological profile of tomatoes grown in greenhouses at a Mexican hydroponic farm with a high technological level and sanitary agricultural practices (SAPs) in place. Tomatoes and other materials associated with the farm were analyzed for the presence of Salmonella enterica and populations of Escherichia coli, coliforms, and Enterobacteriaceae. Tomatoes showed median levels of 0.8 log CFU per tomato for Enterobacteriaceae, <0.5 log CFU per tomato for coliforms, and 0.5 most probable number per tomato for E. coli. Despite the physical barriers that the facilities provide and the implemented SAPs, we found that 2.8% of tomatoes were contaminated with Salmonella and 0.7% with E. coli. Other Salmonella-positive materials were puddles, soil, cleaning cloths, and sponges. Samples from the nursery and greenhouses were positive for E. coli, whereas Salmonella was found only in the latter. Although hydroponic greenhouses provide physical barriers against some sources of enteric bacterial contamination, these results show that sporadic evidence of fecal contamination and the presence of Salmonella can occur at the studied greenhouse farm.

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Coleman, Shannon M., Bledar Bisha, Steven E. Newman, Marisa Bunning, and Lawrence D. Goodridge. "Transmission and Persistence of Salmonella enterica in Nutrient Solution of Hydroponic Greenhouse Grown Tomatoes." HortScience 52, no. 5 (May 2017): 713–18. http://dx.doi.org/10.21273/hortsci11200-16.

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Hydroponic greenhouse tomato production’s popularity has grown in the United States to meet the demands for year-round availability of fresh tomatoes. Although Salmonella has been the cause of several foodborne illness outbreaks linked to tomatoes, the potential for contamination in hydroponic production is not well understood. The objectives of this study were to determine whether biweekly inoculation of Salmonella in a hydroponic tomato nutrient solution would lead to Salmonella survival and contamination of the tomato fruit and plants, hydroponic nutrient film technique (NFT) troughs, and water receptacles. An avirulent strain of Salmonella Typhimurium was used to contaminate the nutrient solution at a concentration of 105 colony-forming units (CFU)/mL. Inoculation was conducted on day 0 and biweekly until the termination of project at 12 weeks; samples were filtered and plated on selective media. Leaves and biofilm coupons were collected on day 0 and every 2 weeks postinoculation. Leaf samples were analyzed using culture methods. The biofilm coupons were analyzed using tape fluorescence in situ hybridization (FISH) method. Fruit samples were collected 6 weeks postinoculation until termination of project and analyzed using culture methods. Typical Salmonella morphology of colonies on plates streaked from overnight cultures from plant samples were confirmed by automated ribotyping. A 2-log10 reduction of cells was observed in water samples 2 days post initial inoculation. Reduction continued over the 2-week period with few cells surviving until the next inoculation. S. Typhimurium was observed on the surface of the root systems. However, a splash incident resulted in low-level contamination of selected leaves and fruit samples. The results of the study indicate that although contaminated hydroponic nutrient solution led to surface contamination of roots, such an event may not pose a high risk of contamination of hydroponically grown fruit.

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Ntinas, Georgios K., Kalliopi Kadoglidou, Nektaria Tsivelika, Konstantinos Krommydas, Apostolos Kalivas, Parthenopi Ralli, and Maria Irakli. "Performance and Hydroponic Tomato Crop Quality Characteristics in a Novel Greenhouse Using Dye-Sensitized Solar Cell Technology for Covering Material." Horticulturae 5, no. 2 (June 1, 2019): 42. http://dx.doi.org/10.3390/horticulturae5020042.

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In this study, we evaluated crop productivity and physiology during the hydroponic cultivation of medium-sized and cherry tomato crops, using two experimental greenhouses. Of the greenhouses, one used dye-sensitized solar cell (DSSC) technology for covering material, whilst the other, a conventional one (CONV), was covered using diffusion glass as a control. The effect of the colored lighting that resulted from the DSSC glass filtering on the physiological response of the crops was examined by measuring the plant transpiration rate and leaf chlorophyll content. Furthermore, we evaluated potential differences in the concentration of phytochemical compounds, such as ascorbic acid, lycopene, and quality characteristics. Tomato plants in the DSSC greenhouse presented lower early and total yields, as well as lower chlorophyll content, stomatal conductance, photosynthetic rate, and transpiration rate values, especially in the medium-sized fruits, as compared to the CONV greenhouse. The DSSC greenhouse showed significantly higher values of bioactive compounds for both the cherry and medium-sized tomato, with increases in the ascorbic acid, lycopene, β-carotene, and total carotenoids concentration, which ranged from 6% to 26%. Finally, for both the hybrids, the 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) tests showed circa 10% and 5% increase, respectively, in the DSSC greenhouse.

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Lopes, Sidinei José, Durval Dourado Neto, Paulo Augusto Manfron, and Luís Renato Jasniewicz. "Models to estimate phytomass accumulation of hydroponic lettuce." Scientia Agricola 61, no. 4 (2004): 392–400. http://dx.doi.org/10.1590/s0103-90162004000400007.

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The protected and hydroponics cultivation are increasing in Brazil, demanding a better knowledge of crop performance in this environment. Plant dry matter accumulation as a function of solar radiation, temperature, relative humidity and other weather parameters in greenhouse is different when compared with field cultivation. With the purpose of proposing models to characterize the temporal variation of leaf and total dry matter production of hydroponics-grown lettuce (Lactuca sativa L.) and to determine the flowering period and the maximum dry matter accumulation rate as a function of plant relative development (relative degree-days), solar radiation and effective thermal index, two experiments (Spring and Autumn) were carried out in the greenhouse, at Santa Maria, Rio Grande do Sul State, Brazil. Growth and development models are useful in obtaining basic information on the plant <FONT FACE=Symbol>´</FONT> environment interactions, maximizing the use of resources in greenhouse, as well as, to define the best form of crop management. The cultivar Vera was chosen as function of its earliness. Models were proposed to estimate the temporal variation of dry matter accumulation, where the best results for relative development were obtained using effective degree-days, characterizing the importance of the air temperature for the vegetative phase and the solar radiation for the reproductive. The yield and quality of the lettuce seeds evidenced a high potential of hydroponics technique.

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Wang, Qinghai, Juan Yang, Cui Li, Bo Xiao, and Xiaoe Que. "Influence of initial pesticide concentrations in water on chlorpyrifos toxicity and removal by Iris pseudacorus." Water Science and Technology 67, no. 9 (May 1, 2013): 1908–15. http://dx.doi.org/10.2166/wst.2013.071.

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For understanding the influence of initial concentrations of pesticides in the water body on removal efficiency of the contaminant by aquatic plants, one hydroponics experiment was used to investigate the influence of initial concentration (1–16 mg L−1) on toxicity and chlorpyrifos removal potential of Iris pseudacorus for 20 days under greenhouse conditions. An increased sensitivity to and reduced removal rate for chlorpyrifos were observed with increasing chlorpyrifos concentration. The relative growth rate (RGR) of I. pseudacorus was significantly inhibited in the presence of 4, 8 and 16 mg L−1 chlorpyrifos, and a negative relationship was also found between RGR and initial pesticide concentration. The half-life of chlorpyrifos was shortened in the hydroponic system with plants, indicating that I. pseudacorus accelerated chlorpyrifos removal from water. But the contribution of the plant to chlorpyrifos removal in the hydroponic phytoremediation system decreased with the increase of initial concentration of chlorpyrifos. The results also indicated that I. pseudacorus can efficiently eliminate chlorpyrifos and may ultimately serve as phytoremediation agents in the natural water body.

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42

Wang, Yi-Ju, Amanda J. Deering, and Hye-Ji Kim. "The Occurrence of Shiga Toxin-Producing E. coli in Aquaponic and Hydroponic Systems." Horticulturae 6, no. 1 (January 2, 2020): 1. http://dx.doi.org/10.3390/horticulturae6010001.

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Food safety concerns have been raised over vegetables and herbs grown in aquaponics and hydroponics due to the reuse of wastewater and spent nutrient solutions. This study was conducted to determine the occurrence of foodborne pathogens in greenhouse-based aquaponic and hydroponic systems. Fish feces, recirculating water, roots, and the edible portions of lettuce, basil, and tomato were collected at harvest, and microbiological analyses were conducted for the bacterial pathogens Shiga toxin-producing Escherichia coli (STEC), Listeria monocytogenes, and Salmonella spp. Enrichments and selective media were used for the isolation, and presumptive positive colonies were confirmed by PCR. STEC was found in fish feces, in the water of both systems, and on the surface of the roots of lettuce, basil, and tomato regardless of the system. However, contaminated water did not lead to the internalization of STEC into the roots, leaves, and/or fruit of the plants. Meanwhile, L. monocytogenes and Salmonella spp. were not present in any samples examined. Our results demonstrated that there are potential food safety hazards for fresh produce grown in aquaponic and hydroponic production systems.

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Sánchez-del Castillo, F., E. del C. Moreno-Pérez, and E. L. Cruz-Arellanes. "PRODUCCIÓN DE JITOMATE HIDROPÓNICO BAJO INVERNADERO EN UN SISTEMA DE DOSEL EN FORMA DE ESCALERA." Revista Chapingo Serie Horticultura 15, no. 1 (April 2009): 67–73. http://dx.doi.org/10.5154/r.rchsh.2009.15.009.

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Abidin, Syed Zainol, Ronny D. Nasihien, and Hery Budiyanto. "Air inflated Greenhouse As Urban Farming Facilities: Architectural Overview." IJTI (International Journal of Transportation and Infrastructure) 1, no. 1 (September 29, 2017): 1–8. http://dx.doi.org/10.29138/ijti.v1i1.326.

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Urban Farming utilizing land intensification, in order to meet the needs of fresh vegetables and fruits everyday for the community residential / housing in urban areas. Air Inflated Greenhouse as urban farming facilities, can be built and transferred to a residential location / specific housing is easy, safe, fast and lightweight (0,55mm PVC tarpaulin) so that urban farming products closer to consumers in urban settlements, the price impact getting cheaper, but quality. Long-term goal is to develop prototype Air inflated Greenhouse as facilities Urban Farming which fulfills the power, speed, effectiveness, comfort and encourage crops of fruit / vegetable hydroponic hygienic, cheap and profitable, so that the product Air Inflated Greenhouse automatically support an increase in food production, specific target is the availability prototype Air Inflated Greenhouse as Urban Farming facility in order to increase productivity of crops of fruit / vegetable hydroponic hygienic, cheap and profitable, so the high prospects for mass production by SMEs Partners to meet national food requirements. Methods using methods Experiments and Action Research, beginning with the development of design, manufacture, testing and repair of prototype Air Inflated Greenhouse includes (1) a test of strength and endurance of materials Air Inflated Greenhouse to the weather, (2) test material Air Inflated Greenhouse most effective as a component of the structure, (3) test the speed of manufacture, transport, assembly, installation, dismantling Air Inflated Greenhouse, (4) test the temperature, humidity and air pressure in the Air Inflated Greenhouse.

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Kachanova, O. A., and D. K. Levonevskiy. "Software Architecture of an Automated Greenhouse Complex based on Cloud Technologies." Programmnaya Ingeneria 12, no. 9 (December 16, 2021): 474–89. http://dx.doi.org/10.17587/prin.12.475-489.

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To grow crops in greenhouse complexes, it is necessary to maintain the microclimatic conditions required for these crops and monitor them. Automation of these processes is an urgent task, and for its solution it is necessary to use both hardware and software. The paper proposes a cloud service architecture for managing robotic vertical farms, which allows for reliable two-way data transfer between the greenhouse modules and the operator and can be used for growing crops both in vertical hydroponic installations and in single-level greenhouses of greenhouses. The business processes are described that allow you to understand and evaluate the principles of organizing monitoring and management of cultivation. On the basis of the developed architecture, software has been implemented, which has been tested in the tasks of managing the greenhouse complex and obtaining data on the microclimate. Thanks to the use of wireless networks, the absence of restrictions on the type and location of modules, duplication of functionality and data replication, such a system can be considered flexible in use and scalable.

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Gul, A., F. Sen, and M. Bonakdarzedeh. "Does greenhouse covering material affect fruit quality of hydroponic tomatoes?" Acta Horticulturae, no. 1107 (December 2015): 237–44. http://dx.doi.org/10.17660/actahortic.2015.1107.32.

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Hultberg, Malin, Anders S. Carlsson, and Susanne Gustafsson. "Treatment of drainage solution from hydroponic greenhouse production with microalgae." Bioresource Technology 136 (May 2013): 401–6. http://dx.doi.org/10.1016/j.biortech.2013.03.019.

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Kitta, E., N. Katsoulas, and C. Kittas. "Effect of shading on photosynthesis in greenhouse hydroponic cucumber crops." Acta Horticulturae, no. 1320 (August 2021): 167–72. http://dx.doi.org/10.17660/actahortic.2021.1320.21.

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Christy, Julieta, Lollie Agustina P. Putri, and Diana Sofia Hanafiah. "A STUDY OF HYDROPONIC MELON CULTIVATIONS WITH SEVERAL SUBSTRATE MEDIA AND VARIETIES." Journal of Community Research and Service 1, no. 2 (March 29, 2018): 92. http://dx.doi.org/10.24114/jcrs.v1i2.9343.

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AbstractMelon is a fruit plant that has a high nutritional value. A limited agricultural land encourages the application of alternatives planting method and utilizes local materials around the community as potential planting media towards resulting a high-yielding variety. One of the cultivation techniques is the use of the hydroponics system. The objective of this study is to determine the most suitable planting medium for melon varieties to be planted hydroponically. This research was conducted in the greenhouse at the sub-district of Medan Tuntungan in the city of Medan during May to August 2017. This research used Randomize Complete Block Design Factorial with 3 replications. The use of planting media consisted of charcoal husk, cocopeat, sawdust and sand; whereby the treatment of varieties consisted of Aramis F1, Amanta F1 and Red Aroma. The results showed that the best medium for hydroponics melon is charcoal husk highlighting significant result onto the plant height, number of leaves and fruit weight of crops, from the use of charcoal husk media.Keywords: hydroponic, soilless culture, melon, medium and variety

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Baâtour, Olfa, Imen Tarchoune, Hela Mahmoudi, Nawel Nassri, Wissal Abidi, Rym Kaddour, Ghaith Hamdaoui, Mouhiba Nasri-Ayachi, Mohtar Lachaâl, and Brahim Marzouk. "Culture conditions and salt effects on essential oil composition of sweet marjoram (Origanum majorana) from Tunisia." Acta Pharmaceutica 62, no. 2 (June 1, 2012): 251–61. http://dx.doi.org/10.2478/v10007-012-0019-9.

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Culture conditions and salt effects on essential oil composition of sweet marjoram (Origanum majorana) from TunisiaO. majoranashoots were investigated for their essential oil (EO) composition. Two experiments were carried out; the first on hydroponic medium in a culture chamber and the second on inert sand in a greenhouse for 20 days. Plants were cultivated for 17 days in hydroponic medium supplemented with NaCl 100 mmol L-1. The results showed that theO. majoranahydroponic medium offered higher essential oil yield than that from the greenhouse. The latter increased significantly in yield (by 50 %) under saline constraint while it did not change in the culture chamber. Under greenhouse conditions and in the absence of salt treatment, the major constituents were terpinen-4-ol andtrans-sabinene hydrate. However, in the culture chamber, the major volatile components werecis-sabinene hydrate and terpinen-4-ol. In the presence of NaCl, new compounds appeared, such as eicosane, spathulenol, eugenol, and phenol. In addition, in the greenhouse, with or without salt, a very important change oftrans-sabinene hydrate concentration in EO occurred, whereas in the culture chamber change appeared incis-sabinene hydrate content.

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Journal articles on the topic 'Hydroponic greenhouse'

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