Relevant bibliographies by topics / Hydroponic

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Hydroponic'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2023

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Journal articles on the topic "Hydroponic"

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Anita, Anita. "Budidaya Hidroponik Posyandu Mawar Desa Palioi Kecamatan Kindang Kabupaten Bulukumba." Jurnal Nasional Pengabdian Masyarakat 1, no. 1 (December 19, 2020): 1–8. http://dx.doi.org/10.47747/pengabdiankepadamasyarakat.v1i1.117.

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Posyandu (Integrated Service Post) is a form of community self-help activity in the health sector whose existence is expected to bring promotive and preventive efforts closer to the community. Based on the output of the survey conducted at Posyandu Mawar, located in Palioi Village, Kindang District, Bulukumba Regency, it was found that there is still minimal use of posyandu land for vegetable cultivation. One method solution to solving the problem of Posyandu Mawar cadres is conducting hydroponic training. Hydroponics is the cultivation of planting using water without using soil but emphasizes more on meeting nutritional needs for plants. The method used uses interactive lecturing techniques using power point media. The materials provided are: (a) Definition of Hydroponics, (b) Excess Hydroponics, (c) Procurement of Hydroponic planting media, (d) Types of Hydroponic Plants, (e) Maintenance of Hydroponic Plants, (f) Hydroponic Harvesting. Training activities and practice of making hydroponics have been carried out with the output of this Community Partnership Program, namely Posyandu Mawar cadres who understand hydroponic vegetable cultivation and are able to practice it.
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Zherebtsov, Boris, Alexander Kozlov, and Sergey Netesov. "Analysis and selection of an effective method for growing meristemic potato plants (SolanumTuberosum L.)." АгроЭкоИнфо 7, Special (November 24, 2021): 14. http://dx.doi.org/10.51419/20217014.

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In this article, methods of growing meristemic plants are considered and the basics of hydroponics techniques are studied. Studies of the main characteristics of growing potato plants in a nutrient medium on the basis of a designed automated hydroponic installation are presented and the indicators are compared with traditional methods. Keywords: HYDROPONICS, GROUNDLESS CULTIVATION METHODS, HYDROPONIC AGRICULTURE, HYDROPONIC TECHNOLOGIES
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Aryani, Diah, Ignatius Agus Supriyono, Hani Dewi Ariessanti, Shine Pintor Siolemba Patiro, and Ichyan Holilan. "Design Of Smart Hydroponics Based On Raspberry Pi 3." Petir 14, no. 2 (September 2, 2021): 235–46. http://dx.doi.org/10.33322/petir.v14i2.1198.

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The development of hydroponic suitable methods is currently quite good, the utilization of the narrow land availability and the people's attractiveness to hydroponics are the reasons for the developing hydroponic suitable method. However, in its development, there is less land with soil growing media, there is a pattern of farming using water media, namely hydroponics (Hydroponics). Hydroponic cultivation must pay attention to the elements that plants need, such as providing special nutrition to plants. The provision of nutrition that is done manually often results in irregular nutrition in hydroponics which results in disruption of hydroponic plant growth and harvest is not optimal. Research on the Smart Hydroponics System based on the Raspberry Pi 3 using the tidal hydroponic system can make it easier for every human being who wants to grow crops especially who are busy with work activities. With the research methodology using flowchart design methods and system block diagrams, where the Raspberry Pi 3 Mini Computer is used to control pumps in the circulation of hydroponic plant nutrients. Set the nutrient pump On / Off, display a Video Stream from the Cyberlink C170 webcam to check the progress of fruit or vegetable crops ready for harvest. Everything is done remotely via the Web Interface at the Manapu location so that with this research, monitoring can be carried out and it is easier to provide the elements needed by plants
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Fahri, Fadel Alfahri, Yuspian Gunawan, and Prinob Aksar. "Analisis Sistem Perpipaan Pada Hidroponik Sistem Deep Flow Tehnique." Enthalpy : Jurnal Ilmiah Mahasiswa Teknik Mesin 7, no. 2 (May 31, 2022): 75. http://dx.doi.org/10.55679/enthalpy.v7i2.24769.

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Hydroponics is water management that is used as a medium for plant growth, deep flow technique hydroponics is a hydroponic system that circulates water continuously in a closed flow circuit using a pump. DFT hydroponics. This research was carried out by paying attention to the piping system and drawing the installation of the piping system using the Inventor software and then testing. Data collection was carried out by analyzing the supply system, calculating the flow rate, determining the type of flow and performing a strength simulation on the DFT hydroponic rack using the Inventor software application. The research shows the flow rate is 1.43 L/minute and the pump flowrate is 10 L/minute so that the water supply efficiency is 0.143 L/minute (14%). The resulting Reynolds value is 1304.61 m2/s, so the flow that works is laminar flow. Based on the simulation results, the maximum stress on the DFT hydroponic rack is 1616 MPa while the load on the DFT hydroponic rack is 37.8426 MPa so it is safe to use.Keywords:Piping system, hydroponic deep flow tehnique
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Suresh, Pulla, Sam Nirmal, and Arpan Roy. "Hydroponic Farming in Indian Hotels." Volume 5 - 2020, Issue 8 - August 5, no. 8 (September 4, 2020): 1038–41. http://dx.doi.org/10.38124/ijisrt20aug589.

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Hydroponics farms have become a new trend in the Agricultural sector, especially with the growing needs of food and also because of the limited resources. The purpose of the research project was to gain knowledge about the modern Farming Method. The findings of the research suggest that in about 5-10 years of time the hydroponic business is eyed to increase about 200%-300%compared to the present situation. The food products produced by Hydroponics method are both nutritious and organic. The limited use of resources in hydroponic farming makes this method the tool for future sustainability. The complete analysis of the research has been made by using 2 basic research tools .One is an online survey, conducted to collect the information regarding people views about Hydroponics. The other tool was an interview with a local Hydroponic Grower.
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Pratama, Johan Andri, Alfian Hamdani, and Aryanda Tata Permana. "Growing Insights and Youth Knowledge in the NFT Hydraulic Application (Nutrient Film Technique)." Kontribusia (Research Dissemination for Community Development) 2, no. 1 (February 22, 2019): 41. http://dx.doi.org/10.30587/kontribusia.v2i1.781.

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The more rapid growth of technology allows humans to work effectively and efficiently. Technology proves the way humans change patterns of significant social change, from those that initially used human power to machines. The way humans use machines is inseparable from the ways and techniques of its use which are effective and efficient. One of the technologies used is the technology of crop cultivation without using soil as a planting medium. The technology introduced is hydroponics. Hydroponics as a way of farming is an approach that has several advantages, namely the use of agricultural land that is not extensive, and the system is not too complicated. The introduction of this technology aims to provide insight and knowledge to the public about the technology of crop cultivation in addition to conventional farming systems. This activity was carried out in Rayung gumuk Village, Glagah District, Lamongan Regency. The hydroponic system that we introduce is the NFT hydroponic system (Nutrient Film Technique). The goal is because the hydroponic system is easily applied and has several significant advantages. The first method of implementation is socialization.This is done to find out the extent to which people's insights and knowledge about hydroponics and the interests and interests of the community towards hydroponic using the NFT system. Moreover, the second is training. It aims to provide techniques and methods for assembling NFT hydroponic installations. From the results of our activities, the community's response to hydroponics is still minimal because some of them still consider hydroponic use too costly and their disinterest in agriculture.
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Izzuddin, Ahmad. "Wirausaha Santri Berbasis Budidaya Tanaman Hidroponik." Dimas: Jurnal Pemikiran Agama untuk Pemberdayaan 16, no. 2 (December 7, 2016): 351. http://dx.doi.org/10.21580/dms.2016.162.1097.

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Cultivation of hydroponic plants need to be socialized in detail and depth to the students Ponpes Life Skill DaarunNajaah. In addition to training students to grow plants that are effective and efficient, training hydroponic plant cultivation is expected to train the spirit of independence and entrepreneurial spirit in view of this hydroponic plant is a plant that has the potential to sell on the market because the quality is good for health. Farming with hydroponics system saves 90% of water use compared with planting in the ground. Hydroponics system has many advantages than conventional systems with their land.
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Arizona, Rafil, Jhonni Rahman, Syarifah Farradina, Zaflis Zaim, and Prima Titisari. "Rekayasa Growth Light LED Berbasis Solar Cell untuk Percepatan Pertumbuhan Tanaman Hidroponik Pada Usaha “Sidomulyo Hidroponik”." Dinamisia : Jurnal Pengabdian Kepada Masyarakat 6, no. 3 (June 30, 2022): 596–602. http://dx.doi.org/10.31849/dinamisia.v6i3.9184.

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This activity is a research-based community service program. The goal of this community service program is to create a series of solar cell-based grow light led lights as a source of electrical energy in the "Sidomulyo Hydroponics" business, to increase the growth of hydroponic plants, to improve the quality and quantity of hydroponic plants, to provide residents with insight into optimizing the use of public land for urban farming, and to improve mental health during the pandemic by growing hydroponic crops. This program's outputs include the development of skills for residents of Sidomulyo housing to cultivate hydroponically, as well as the establishment of a hydroponic plant center. The implementation method used consists of two major stages: preparation and core. The following are the implementation results: all sessions in the preparation stage, as well as the core program of socialization, inauguration, core activities, and design projects, were completed on time. The use of a series of solar cell-based LED grow lights as a source of hydroponic electrical energy, increasing the quality and quantity of hydroponic plants in the "Sidomulyo Hydroponics" business, and being able to practice self-healing are all indicators of success.
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Wulandari, Retno, Francy Rivansuna Fifintari, and Triwara Buddhisatyarini. "Empowerment of urban communities in utilizing small courtyards with hydroponic technology." Community Empowerment 7, no. 8 (August 23, 2022): 1294–303. http://dx.doi.org/10.31603/ce.6243.

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Hydroponic technology is one way to grow crops on a small piece of land. Homes in urban areas can use this approach. The purpose of this community service is to increase the role of members of the Women Farmers Group (KWT) in the use of small urban yards using hydroponic technology, especially for KWT Agro 40 in Pilahan Village, Kotagede, Yogyakarta City. In this program, the empowerment of group members is achieved through counseling, training on demonstration plots, mentoring, oversight, and evaluation. Members of KWT Agro 40 are knowledgeable and skilled in using their yard to grow vegetables using hydroponic methods, allowing them to use their yard to improve family nutrition and income. This community service resulted in one hydroponic installation with the NFT system (Nutrient Film Technique) and 5 hydroponic installations with the wick system. Hydroponics technology made with the NFT system is placed in the group garden, while for hydroponics with the wick system it is placed in the group garden and in the homes of KWT members. The harvest from this hydroponic technology can meet the needs of healthy and nutritious vegetables and can reduce family expenses.
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Untoro, Meida Cahyo, and Fathan Rizki Hidayah. "IOT-BASED HYDROPONIC PLANT MONITORING AND CONTROL SYSTEM TO MAINTAIN PLANT FERTILITY." INTEK: Jurnal Penelitian 9, no. 1 (April 1, 2022): 33. http://dx.doi.org/10.31963/intek.v9i1.3407.

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Hydroponics is a method of cultivating plants by utilizing a small amount of land without using soil media. Hydroponic cultivation is still done conventionally in monitoring and controlling nutrients and pH of the air. Hydroponics is already with Internet of Things (IoT) technology in the cultivation process. The research aims to use IoT technology by developing control devices and monitoring hydroponic plants remotely, to make it easier for cultivators to control and monitor plant color, temperature, nutrients and the pH value of hydroponic plant water. Control and monitoring can be done through a smartphone application. The data from testing the condition of hydroponic plants obtained an average error of 1.8% for air temperature, 4.8% for water pH, 6.6% for plant color and 7% for water nutrients. Hydroponic plants with the TCS3200 sensor get a monitoring opportunity of 53.3%. Testing of tool control related to nutritional improvement has been carried out using the fuzzy Mamdani method with an increase in the probability of 88.75% for adding nutritional value and 0% for decreasing nutritional value. Tool control for improving the pH value of hydroponic plant water has been successfully carried out.
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Dissertations / Theses on the topic "Hydroponic"

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Földhazy, Erik. "Smart Hydroponics : Conceptual Design of Hydroponic Plant System for Home Environment." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67827.

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Hydroponics is a method of cultivating plants without the use of soil. Soil acts as a growth medium which gives plants stability, provides nutrients and allows roots to be kept wet without drowning. In hydroponics the soil’s functions are replaced by synthesized methods. Stability comes from a substrate (i.e. LECA, rockwool perlite).The 16 essential nutrients are solved in water which are distributed to plants’ roots by different techniques. To generate photosynthesis natural light is replaced by artificial light, especially red light in the proximity of 660 nm. Hydroponics has been used as a cultivation method for at least 2000 years. During the 20th century industrial applications became common since plastics allowed for complex systems engineering. The method also makes it possible to grow the same amount of crops with approximately 10% water usage and 25% of the area compared to conventional cultivation. During the past few years systems for home use has emerged but the product genre is still in its cradle. This master thesis covers a new conceptual design of a hydroponic home system. The project was carried out at Omecon AB in Stockholm as a consulting design project. Omecon AB is an engineering consultant agency within mostly mechanical construction looking to widen the competence base. Using a design process based on Human-Centered Design the project involved the stakeholders users, extreme users, Omecon AB, plant experts, electronics engineering and service as well as plastics design engineering. Additional/supplemental economical–, ecological– and social sustainability aspects has been considered during all phases of the process. By using the Human-Centered Design process the problem range is expanded from its initial state which results in a more complete end result. Common methodology altered with some unorthodox twists has been utilized throughout the project. The final result is a conceptual hydroponic system for home environment which is designed as an interior design product as well as a high-performance cultivation system. By using natural materials such as wood and steel the users expands its life span and thus mitigates the negative environmental impact. Another aspect which prolongs the products life span is the modular usage which lets users vary and choose their preferred settings. All manufactured materials included in the final concept were flow resources and the parts were engineered to be easily separable for future replacement and recycling. A new type of pot was invented along with a new way of adjusting the height-wise position of lamps. The aeroponic technique, which was applied to this concept, is generally considered to generate the largest plants and thus comprises higher performance compared to other home systems. The use of substrate was also eliminated which decreases continous material consumption within hydroponics.
Hydroponik är en metod för att odla växter utan jord. Jord i odling agerar som ett växtmedium som ger plantor stabilitet, tillför näringsämnen och tillåter rötter att vara i väta utan att dränka dem. I hydroponik ersätts jordens funktioner med syntetiska metoder. Stabilitet ges av ett substrat (t.ex. LECA-kulor, stenull eller perlit). De 16 essentiella näringsämnena löses i vatten och distribueras till plantors rötter med hjälp av olika tekniker. For att skapa fotosyntes ersätts naturligt ljus med artificiellt ljus. Speciellt rött ljus i närheten av 660 nm. Hydroponik har använts som odlingsmetod i åtminstånde 2000 år. Under 1900-talet blev industiella applikationer vanliga eftersom plast möjliggjorde tillverkling av komplexa system. Metoden tillåter även att odla samma mängd grödor med 10% av vattenmängden och 25% av ytan jämfört med konventionell odling. Under de senaste åren har system avsedda för användning hemma blivit vanligare men produktgenren är fortfarande ung. Det här examensarbetet täcker en ny konceptuell design av ett hydroponiskt system för hemmabruk. Projektet utfördes på Omecon AB i Stockholm som ett konsultarbete inom design. Omecon AB är en konsultfirma som mestadels är verksamma inom mekanikkonstruktion men de vill vidga sin kompetens. Genom användning av en designprocess som har baserats på Human-Centered Design har projektet involverat intressenterna användare, extrema användare, Omecon AB, växtexperter, en elektronikingenjör samt plastkonstruktion. Vidare har aspekter inom ekonomisk–, ekologisk– och social hållbarhet beaktats genom alla faser av processen. Via användning av Human-Centered Design-processen har problemrummet expanderats från den initiala utgångspunkten vilket resulterar i ett mer komplett slutresultat. Vanlig metodik varvat med okonventionella anpassningar har använts genom projektet. Slutresultatet består av ett konceptuellt hydroponiskt system för hemmabruk som är designat som en inredningsprodukt samt ett odlingssystem med hög prestanda. Genom användning av naturliga material som trä och stål förlänger användarna produktens livslängd och på så sätt förmildras den negativa klimatpåverkan. En annan aspekt som förlänger produktens livslängd är moduläriteten som låter användare variera och välja deras föredragna inställningar. Alla tillverkade material inkluderade i slutkonceptet var flödesresurser och delarna konstruerades så att de går lätt att separera för framtida ersättning och återvinning. En ny typ av kruka uppfanns tillsammans med ett nytt sätt att justera höjden av lamporna. Den aeroponiska tekniken, som används is konceptet, är allmänt ansedd att generera de största plantorna och innefattar därför högre prestanda jämfört med andra hydroponiska hemmasystem. Användning av substrat eliminerades också vilket minskar kontinuerlig materialkonsumption inom hydroponik.
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Ortner, Jens, and Erik Ågren. "Automated Hydroponic system." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264438.

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This report includes research into how to automate a small scale system for hydroponics. Hydroponics is a growing technique which features a soil-less environment were the plants roots are exposed to a nutrient-enriched water solution. The research focused mainly on how to regulate the pH and the level of nutrient in the water solvent and finding a system to automate that process. In the research fully grown basil plants were used as test specimens, with the plants roots submerged in a water solvent. The water solvent had sensors that were connected to a micro controller making it possible to monitor the presence of nutrients and pH in the solvent. If the micro controller deemed that the pH and/or the nutrient level was too high or too low, the micro controller would adjust the solvent by activating pumps adding pH down buffer solution and/or nutrient solution to the solvent. The research proved that a way to automate a small scale hydroponics system is by building a computerized system consisting of: • Micro controller. • pH sensor. •EC sensor (to measure nutrient level in solvent). • Temperature sensor. • Fluid pumps connected to pH- and nutrient reservoirs
I denna rapport följer en forskning om hur ett system för hydroponics kan automatiseras. Hydroponics är en odlingsteknik som utesluter nyttjandet av jord. Istället får plantorna näring och vatten via en näringsrik vattenlösning som dess rötter är i kontakt med. Forskningen fokuserade huvudsakligen på hur man reglerar pH och nivån av näringsämnen i en vattenlösning och skapa ett system för att automatisera denna processen. I undersökningen användes fullvuxna basilikaväxter som prover med plantornas rötter nedsänkta i en vattenlösning. Vattenlösningen hade sensorer som var anslutna till en mikrostyrenhet som gjorde det möjligt att övervaka nivån av näringsämnen och pH i vattenlösningen.  Om mikrokontrollen ansåg att pH- och/eller nivån av näringsämnen var felaktig så skulle mikrostyrenheten justera vattenlösningen. Detta skedde genom att mikrostyrenheten aktiverade vätskepumpar som tilsatte pH-buffer och/eller näringslösning. Forskningen visade att ett sätt att automatisera ett hydroponicsystem är att bygga ett datoriserat system som består utav: mikrostyrenhet. pH mätare. EC mätare (används för att mäta näringsnivån i vattenlösningen). Temperaturmätare. Vätskepumpar anslutna till behållare inehållandes pH- och näringslösning.
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Martin, Colin. "Towards a Hydroponic Architecture." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1554119967725464.

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Ling, Jonathan, and Gustav Lindstrand. "Optimizable Hydroponic Plant Incubator : Building a hydroponic plant incubator with a highly optimizable environment." Thesis, KTH, Mekatronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-295805.

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This report investigates how to build a compact, optimizable and at the same time user friendly hydroponic systemfor growing plants as efficiently as possible. Hydroponics grows plants using water with dissolved nutrients instead of soil, allowing faster and more efficient growth.The focus has been on the implementation and the usability of such a system, centering around monitoring and to some degree controlling important parameters for growth such as humidity, air temperature, nutrition concentration and light intensity, colour and exposure time. The plant is enclosed in a confined space with artificial lighting which allows thorough control of the light environment. In order to achieve the desired level of control over the growth parameters, several sensors along with a microcontroller were used. A touch screen with a custom built graphical user interface was also connected to allow the user to control and monitor important aspects of growth conditions. The conclusion drawn from this project is that there is ahigh order of optimizability within the boundaries of this project. The measured factors are easily read on an intuitive, easily navigated touch screen for direct feedback. Regarding the lights’ effect on plant growth, the conclusionis drawn that plants grow well with many types of lights, but more time is needed to thoroughly investigate different light exposure times, colour and intensity.
I denna rapport undersöks hur man kan bygga ett kompakt, optimerat och samtidigt användarvänligt hydroponiskt system för att odla växter så effektivt som möjligt. Hydroponiska system får plantor att växa genom att användavatten med näring istället för jord, vilket tillåter snabbare och mer effektiv tillväxt. Fokuset i denna rapport har varit på implementeringen och användbarheten av ett sådant system, med tyngpunkt på övervakning och till viss grad styrning av viktiga faktorer i en plantas tillväxt såsom luftfuktighet, temperatur, näringskoncentration och ljusintensitet, färg och exponeringstid. Växten är innesluten i ett begränsat utrymme med artificiellt ljus, vilket tillåter genomgående kontroll av ljusmiljön. För att uppnå önskad kontroll av tillväxtparametrarna, användes ett flertal sensorer tillsammans med en mikrokontroller. Till detta kopplades en pekskärm med ett egen tillverkat användargränssnitt, som tillåter användaren att kontrollera och övervaka viktiga aspekter i tillväxten. Slutsatsen från detta projekt är att det finns en hög grad av optimerbarhet inom denna konstruktion. De uppmätta parametrarna kan enkelt avläsa ljusexponering, ljusintesitet och färg.
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Ndame, Loic Andre Stephane. "Wireless ICT monitoring for hydroponic agriculture." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/3605.

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It is becoming increasingly evident that agriculture is playing a pivotal role in the socio-economic development of South Africa. The agricultural sector is important because it contributes approximately 2% to the gross domestic product of the country. However, many factors impact on the sustainability of traditional agriculture in South Africa. Unpredictable climatic conditions, land degradation and a lack of information and awareness of innovative farming solutions are among the factors plaguing the South African agricultural landscape. Various farming techniques have been looked at in order to mitigate these challenges. Among these interventions are the introduction of organic agriculture, greenhouse agriculture and hydroponic agriculture, which is the focus area of this study. Hydroponic agriculture is a method of precision agriculture where plants are grown in a mineral nutrient solution instead labour- intensive activity that requires an incessant monitoring of the farm environment in order to ensure a successful harvest. Hydroponic agriculture, however, presents a number of challenges that can be mitigated by leveraging the recent mobile Information and Communication Technologies (ICTs) breakthroughs. This dissertation reports on the development of a wireless ICT monitoring application for hydroponic agriculture: HydroWatcher mobile app. HydroWatcher is a complex system that is composed of several interlacing parts and this study will be focusing on the development of the mobile app, the front-end of the system. This focus is motivated by the fact that in such systems the front-end, being the part that the users interact with, is critical for the acceptance of the system. However, in order to design and develop any part of HydroWatcher, it is crucial to understand the context of hydroponic agriculture in South Africa. Therefore, complementary objectives of this study are to identify the critical factors that impact hydroponic agriculture as well as the challenges faced by hydroponic farmers in South Africa. Thus, it leads to the elicitation of the requirements for the design and development of HydroWatcher. This study followed a mixed methods approach, including interviews, observations, exploration of hydroponic farming, to collect the data, which will best enable the researcher to understand the activities relating to hydroponic agriculture. A qualitative content analysis was followed to analyse the data and to constitute the requirements for the system and later to assert their applicability to the mobile app. HydroWatcher proposes to couple recent advances in mobile technology development, like the Android platform, with the contemporary advances in electronics necessary for the creation of wireless sensor nodes, as well as Human Computer interaction guidelines tailored for developing countries, in order to boost the user experience.
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Lewis, Fay. "Bacterial suppression of fungal pathogens in hydroponic solutions." Thesis, University of Hull, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301373.

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Brown, Andrew Charles. "Gravel bed hydroponic treatment of metal contaminated wastewater." Thesis, University of Portsmouth, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266922.

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Dayananda, Hithaishi. "One Square Meter Yield: A Hydroponic System Design." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446249.

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Vertical hydroponic farming is a developing sector that has the potential to mitigate the adverse effects of conventional farming while also meeting the demands of rapidly urbanizing populations. The global food system is responsible for up to 30% of anthropogenic GHG emissions, with primary production accounting for the majority of these emissions. Hydroponic farming is a type of crop production in which the plants grow without the use of soil. It is mainly done indoors. Hydroponic production has various advantages for the food system, including water efficiency, space efficiency, year-round production, and system productivity. Despite many advantages mentioned in the literature, hydroponic farming has certain drawbacks, including a reliance on electricity to grow, a limited choice of crops appropriate for hydroponic cultivation, and a higher product price.This paper examines the obstacles and describes how integrated modular farms might be implemented in Sweden to improve urban food resilience. This project aims to design a modular solution for a closed hydroponic farm using various data gathering and design methodologies. In one year, the designed hydroponic system generates about one ton of lettuce in a one-square-meter area while saving 91.27% of water compared to conventional farming methods. The secondary goal was to assess the designed system's long -term viability interms of social, environmental, and economic sustainability indicators and study the structure from an engineering standpoint.
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Xego, Sibusiso. "Hydroponic propagation of Siphonochilus aethiopicus: an endangered medicinal plant." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2421.

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Thesis (MTech (Horticultural Sciences))--Cape Peninsula University of Technology, 2017.
The increasing demand for medicinal plants has led into serious over-harvesting of wild populations and presents an opportunity for potential profitable cultivation. Production of medicinal plants in controlled environments particularly hydroponic technology provides opportunities for high quality biomass accumulation and optimizes production of secondary metabolites. Water availability and supplies are becoming scarce, thus search for innovative irrigation practices is desirable and vital. The proper irrigation interval and growing media can play a major role in increasing the water use efficiency. Thus, Siphonochilus aethiopicus was cultivated by means of the hydroponic technique, under various substrate combinations and watering regimes.
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Santos, Francisco SÃrgio Ribeiro dos. "Production and nutrition in strawberry crop soil and hydroponic." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13165.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior
Traditional soil based strawberry production currently faces some obstacles, both by excessive use of pesticides, as the diseases caused by fungi and other pathogens and ergonomic difficulties of cultivating the soil. Strawberry soilless cultivation combined with greenhouse and the use of substrate promotes some advantages such as: eliminating the use of products for soil disinfection, precocity, increased yields, better crop management conditions and crop protection against adverse weather conditions, pest attacks and diseases.. The objective of the study was to evaluate yield and nutrition of four strawberry cultivars in three cropping systems in Serra da Ibiapaba â CearÃ. The experiment was conducted in 3 x 4 factorial design, randomized blocks, with three cultivation systems arranged in strips (soil, hydroponic in gutters and bags), with four strawberry cultivars (Oso Grande, Albion, and Camarosa and Festival) and five replications. Coconut fiber was used as substrate in the hydroponic systems. In the period between the sixth and thirty-eighth week after transplanting, the number and average fruit weight, yield per plant and yield were determined. From the beginning of flowering, leaves were collected every two months to determine the levels of macro and micronutrients. Hydroponic gutter and bag systems increased the number of fruits per plant, but did not increase average fruit weight. The strawberry yield in hydroponic cultivation system was superior to soil cultivation. Cultivar Festival presented more fruits than the other cultivars in hydroponic systems. The Oso Grande and Festival cultivars stood out as the average fruit weight and yield, respectively, and may be recommended for hydroponic cultivation for the region of Serra da Ibiapaba. Based on the leaf nutrient contents, it is suggested adjustments in concentrations of phosphorus and magnesium in the nutrient solution used in hydroponic strawberry crop. Keywords: Fragaria x ananassa, cultivar, nutrients, crop system,
O cultivo do morangueiro no solo enfrenta atualmente alguns entraves, tanto pelo uso excessivo de defensivos, como pelas doenÃas causadas por fungos e outros patÃgenos e as dificuldades ergonÃmicas do cultivo no solo. O cultivo em sistemas sem solo combinado com ambiente protegido e o uso de substrato proporciona algumas vantagens como: eliminaÃÃo do uso de produtos destinados à desinfecÃÃo do solo, antecipaÃÃo do inÃcio das colheitas, aumento da produÃÃo, proteÃÃo da cultura Ãs condiÃÃes meteorolÃgicas adversas, ataque de pragas e doenÃas e melhores condiÃÃes de manejo da cultura. O experimento teve como objetivo avaliar a produÃÃo e nutriÃÃo de quatro cultivares de morango em trÃs sistemas de cultivo na Serra da Ibiapaba â CearÃ. O experimento foi conduzido em esquema fatorial 3 x 4, em blocos casualizados, sendo trÃs sistemas de cultivo dispostos em faixa (solo, hidropÃnico em calhas e em s a c o l a s ), com quatro cultivares de morangueiro (Oso Grande, Albion, Camarosa e Festival), com cinco repetiÃÃes. No sistema hidropÃnico foi utilizado como substrato fibra de coco. No perÃodo entre a sexta e trigÃsima oitava semana apÃs o transplantio, foi determinado o nÃmero e peso mÃdio de frutos, produÃÃo por planta e produtividade. A partir do inÃcio do florescimento, foram coletadas a cada dois meses folhas para determinaÃÃo dos teores de macro e micronutrientes. Os sistemas hidropÃnicos em calha e em sacolas aumentaram o nÃmero de frutos por planta, porÃm nÃo aumentaram o peso mÃdio de frutos. A produtividade do morangueiro cultivado no sistema hidropÃnico foi superior ao cultivo no solo. A cultivar Festival apresentou maior nÃmero de frutos em relaÃÃo as demais cultivares nos sistemas hidropÃnicos. As cultivares Oso Grande e Festival destacaram-se quanto a peso mÃdio de frutos e produtividade, respectivamente, sendo recomendadas para cultivo hidropÃnico para regiÃo da Serra da Ibiapaba. Com base nos teores de nutirentes na folha sugere-se ajustes nas concentraÃÃes de fÃsforo e magnÃsio na soluÃÃo nutritiva utilizada no cultivo hidropÃnico do morangueiro. Palavras-chaves: Fragaria x ananassa, cultivar, sistema de cultivo, nutrientes.
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Books on the topic "Hydroponic"

1

Hydroponic gardening. Port Melbourne, Vic: Lothian, 1993.

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Bridwell, Raymond. Hydroponic gardening: The "magic" of modern hydroponics for the home gardener. Santa Barbara, Calif: Woodbridge Press Pub. Co., 1989.

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Godard, Gilles. Building Your Own Hydroponic Systems : Hydroponic Gardening Guide: Hydroponics for Beginners. Independently Published, 2022.

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Godard, Gilles. Building Your Own Hydroponic Systems : Hydroponic Gardening Guide: Hydroponics for Beginners. Independently Published, 2022.

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Cohen, Margaret. Hydroponics: Learn the Gardening Hydroponic Basics and to Manage Hydroponic Systems. Hydroponic Gardening Also for Beginners. Draft2Digital, 2021.

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Hydroponics and protected cultivation: a practical guide. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0000.

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Abstract This book contains 14 chapters. It is a practical guide about hydroponics and protected cultivation. Topics covered include: background and history of hydroponics and protected cultivation; greenhouses and protected cropping structures; greenhouse operation and management; hydroponic systems - solution culture; substrate-based hydroponic systems; organic soilless greenhouse systems; propagation and transplant production; plant nutrition and nutrient formulation; plant Health, plant protection and abiotic factors; hydroponic production of selected crops; plant factories - closed plant production systems; greenhouse produce quality and assessment; and harvest and postharvest factors.
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Hradecky, Josiah. Guidebook on Hydroponics : the Essentials for Starting Your Own Hydroponic Garden: Hydroponic Setup. Independently Published, 2021.

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Deschanel, Zooey. Hydroponics: A Beginner's Guide to Hydroponic Gardening. Independently Published, 2020.

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Hughston, Michael. Hydroponics : Hydroponic Gardening: Growing Vegetables Without Soil. CreateSpace Independent Publishing Platform, 2015.

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Cooperman, Haywood. Building Easy Hydroponic System : How to Create a Hydroponic System and Types of Hydroponic Plants: Guide to Hydroponics Gardening. Independently Published, 2021.

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Book chapters on the topic "Hydroponic"

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Morgan, Lynette. "Organic soilless greenhouse systems." In Hydroponics and protected cultivation: a practical guide, 100–117. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0007.

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Abstract This chapter discusses the organic soilless greenhouse systems. It includes topics on organic greenhouse production, organic hydroponic systems, organic hydroponic nutrients, microbial mineralization of organic nutrients for hydroponics, anaerobic and aerobic processing of organic materials, vermicast and vermicomposting, use of vermiculture liquids in hydroponics, composting for organic nutrient processing and substrate preparation, organic materials for vermicast, composting and biodigester systems, auqaponics, organic hydroponic production systems, biofilms in hydroponic systems, nutrient amendmentsorganic certification in the USA, organic pest and disease control, hybrid systems, and issues commonly encountered with organic hydroponic systems.
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Morgan, Lynette. "Organic soilless greenhouse systems." In Hydroponics and protected cultivation: a practical guide, 100–117. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0100.

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Abstract This chapter discusses the organic soilless greenhouse systems. It includes topics on organic greenhouse production, organic hydroponic systems, organic hydroponic nutrients, microbial mineralization of organic nutrients for hydroponics, anaerobic and aerobic processing of organic materials, vermicast and vermicomposting, use of vermiculture liquids in hydroponics, composting for organic nutrient processing and substrate preparation, organic materials for vermicast, composting and biodigester systems, auqaponics, organic hydroponic production systems, biofilms in hydroponic systems, nutrient amendmentsorganic certification in the USA, organic pest and disease control, hybrid systems, and issues commonly encountered with organic hydroponic systems.
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Maucieri, Carmelo, Carlo Nicoletto, Erik van Os, Dieter Anseeuw, Robin Van Havermaet, and Ranka Junge. "Hydroponic Technologies." In Aquaponics Food Production Systems, 77–110. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_4.

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AbstractHydroponics is a method to grow crops without soil, and as such, these systems are added to aquaculture components to create aquaponics systems. Thus, together with the recirculating aquaculture system (RAS), hydroponic production forms a key part of the aqua-agricultural system of aquaponics. Many different existing hydroponic technologies can be applied when designing aquaponics systems. This depends on the environmental and financial circumstances, the type of crop that is cultivated and the available space. This chapter provides an overview of different hydroponic types, including substrates, nutrients and nutrient solutions, and disinfection methods of the recirculating nutrient solutions.
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Morgan, Lynette. "Hydroponic production of selected crops." In Hydroponics and protected cultivation: a practical guide, 196–228. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0011a.

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Abstract While there is a wide range of potentially profitable crops which can be grown in hydroponics under protected cultivation, greenhouse production is dominated by fruiting crops such as tomatoes, cucumber, capsicum and strawberries, and vegetative species such as lettuce, salad and leafy greens, herbs and specialty crops like microgreens. This chapter summarizes information on a selected range of common hydroponic crops to give basic procedures for each and an outline of the systems of production. These crops include tomato, capsicum or sweet bell pepper, cucumber, lettuce and other salad greens, strawberry and rose. Information is given on their hydroponic production systems and environment, propagation, plant density, pruning, pollination, fruit growth, crop nutrition, pests, diseases, disorders, harvesting and postharvest handling.
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Morgan, Lynette. "Hydroponic production of selected crops." In Hydroponics and protected cultivation: a practical guide, 196–228. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0196.

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Abstract While there is a wide range of potentially profitable crops which can be grown in hydroponics under protected cultivation, greenhouse production is dominated by fruiting crops such as tomatoes, cucumber, capsicum and strawberries, and vegetative species such as lettuce, salad and leafy greens, herbs and specialty crops like microgreens. This chapter summarizes information on a selected range of common hydroponic crops to give basic procedures for each and an outline of the systems of production. These crops include tomato, capsicum or sweet bell pepper, cucumber, lettuce and other salad greens, strawberry and rose. Information is given on their hydroponic production systems and environment, propagation, plant density, pruning, pollination, fruit growth, crop nutrition, pests, diseases, disorders, harvesting and postharvest handling.
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Waller, Peter, and Muluneh Yitayew. "Hydroponic Irrigation Systems." In Irrigation and Drainage Engineering, 369–86. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-05699-9_21.

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Jensen, Merle H., and W. L. Collins. "Hydroponic Vegetable Production." In Horticultural Reviews, 483–558. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118060735.ch10.

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Morgan, Lynette. "Substrate-based Hydroponic Systems." In Hydroponics and protected cultivation: a practical guide, 77–99. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0006.

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Abstract This chapter focuses on substrate-based hydroponic systems. The main purpose of the substrate in hydroponic systems is to provide plant support, allowing roots to grow throughout the medium absorbing water and nutrients from the nutrient solution. Topics discussed are properties of hydroponic substrates, open and closed soilless systems, common hydroponic substrates, substrates and water-holding capacity, substrates and oversaturation, matching substrates to crop species, physical properties of soilless substrates, chemical properties of hydroponic substrates, nutrient delivery in substrate systems, irrigation and moisture control in substrates, and microbial populations in substrates.
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Morgan, Lynette. "Substrate-based Hydroponic Systems." In Hydroponics and protected cultivation: a practical guide, 77–99. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0077.

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Abstract This chapter focuses on substrate-based hydroponic systems. The main purpose of the substrate in hydroponic systems is to provide plant support, allowing roots to grow throughout the medium absorbing water and nutrients from the nutrient solution. Topics discussed are properties of hydroponic substrates, open and closed soilless systems, common hydroponic substrates, substrates and water-holding capacity, substrates and oversaturation, matching substrates to crop species, physical properties of soilless substrates, chemical properties of hydroponic substrates, nutrient delivery in substrate systems, irrigation and moisture control in substrates, and microbial populations in substrates.
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Resh, Howard M. "Rockwool Culture." In Hydroponic Food Production, 251–86. 8th ed. New York: CRC Press, 2022. http://dx.doi.org/10.1201/9781003133254-10.

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Conference papers on the topic "Hydroponic"

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Ghorbel, Roukaya, and Nedim Koşum. "Hydroponic Fodder Production: An Alternative Solution for Feed Scarcity." In 6th International Students Science Congress. Izmir International Guest Student Association, 2022. http://dx.doi.org/10.52460/issc.2022.005.

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Feeds and animal nutrition presents a major sector in providing food security. However, there is a large gap between fodder supply and demand [1]. This gap can be attributed basically to climatic changes, urbanization and increase in meat demand. Nowadays, especially after the covid-19 pandemic, there is a crucial problem in supplying fresh green feed to remote and urban regions. Hydroponic fodder is an alternative solution to provide the sustainability of quality forage for ruminant. Hydroponics can include several crops such as maize, wheat and barley, the fodder can be produced in a short duration (6-10 days) and all year around. The hydroponics fodder present various benefits for animal health. Feeding hydroponically produced fodder increases the digestibility of the nutrients in the ration, which could increase milk production [2]. Hydroponic fodder production is an economic solution particularly where the conventional production of green fodder is limited or unavailable. This technology put forward a solution to address the shortage of forage production caused by the scarcity of green feed in dry seasons and urban areas [3]. That´s why, further studies and academic efforts are needed to expand hydroponic fodder production. The purpose of this study is to review the actual literature on hydroponic fodder production process, nutritious value and effects on livestock production and productivity.
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Popov, Vladimir. "HYDROPONICS IS A NEW PARADIGM AND A WAY OF FODDER PRODUCTION INTENSIFICATION." In Multifunctional adaptive feed production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-22-70-134-144.

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Hydroponics is a way of intensification and a new paradigm of fodder production: from adaptive plant growing to operated cultivation of green mass of the set property. In a review the precondition of introduction of the alternative high-quality green foods "know-how" in completely controllable conditions are presented. Terms and definitions of the general concept and separate parts of hydroponic forage are given. Hydroponics makes for every day providing animals with the adequate quantity of high-quality forage. The hydroponics of forages allows to cultivate ecologically pure and organic product commercially, within economically defensible expenses. The synergy is shown and examples of zootechnical and economic efficiency are resulted.
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Takeuchi, Yuichiro. "Printable Hydroponic Gardens." In CHI'16: CHI Conference on Human Factors in Computing Systems. New York, NY, USA: ACM, 2016. http://dx.doi.org/10.1145/2851581.2892587.

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Bakhtar, Nikita, Varsha Chhabria, Iptisaam Chougle, Harsha Vidhrani, and Rupali Hande. "IoT based Hydroponic Farm." In 2018 International Conference on Smart Systems and Inventive Technology (ICSSIT). IEEE, 2018. http://dx.doi.org/10.1109/icssit.2018.8748447.

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Al-Gharibi, Ruaa Suliman. "IoT-Based Hydroponic System." In 2021 International Conference on System, Computation, Automation and Networking (ICSCAN). IEEE, 2021. http://dx.doi.org/10.1109/icscan53069.2021.9526391.

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Fernandes, Miguel B., Bertinho A. Costa, and Joao M. Lemos. "Hydroponic Greenhouse Crop Optimization." In 2018 13th APCA International Conference on Automatic Control and Soft Computing (CONTROLO). IEEE, 2018. http://dx.doi.org/10.1109/controlo.2018.8514264.

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Umamaheswari, S., A. Preethi, E. Pravin, and R. Dhanusha. "Integrating scheduled hydroponic system." In 2016 IEEE International Conference on Advances in Computer Applications (ICACA). IEEE, 2016. http://dx.doi.org/10.1109/icaca.2016.7887976.

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Kanhekar, Vaibhav, Tejas Deshbhratar, Yogeshwari Matey, Kamlesh Kalbande, and Atul Deshmukh. "Hydroponic Farming using IoT." In 2022 International Conference on Edge Computing and Applications (ICECAA). IEEE, 2022. http://dx.doi.org/10.1109/icecaa55415.2022.9936366.

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Adedeji, Paul A., Obafemi O. Olatunji, Nkosinathi Madushele, and Nickey Janse van Rensburg. "Techno-Economic Analysis of Solar PV-Assisted Hydroponic System - A Case Study in Johannesburg, South Africa." In ASME 2022 Power Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/power2022-86265.

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Abstract Nutrient film technology-based hydroponic systems are hydrophilic. Hence, a constant water supply is essential for the optimal yield and viability of the investment. Though the national grid could power water pumps for a hydroponic system in urban areas, incessant load shedding in South Africa has significantly affected the yield. Hence, the need for an alternative power supply for these systems. This study conducted a techno-economic analysis on a proposed solar photovoltaic (PV) for a hydroponic food garden located in Johannesburg. The case study constitutes one of the Urban Agricultural Initiatives (UAI) in the city. The optimal solar-PV sizing for the hydroponic system was developed. Two scenarios for powering the hydroponic system were investigated vis-à-vis the standalone solar-PV and national grid with solar-PV and battery backup. Among other cost functions, the levelized cost of electricity (LCOE) was used to evaluate the systems. The simulations were performed using HOMER Pro tool for Microgrid Analysis to determine the profitability of the two alternative energy sources on the system. Among the two alternatives, the hybrid system offered a lower net present value (NPV) of 79, 156.74 (ZAR) and an LCOE of 0.47 (ZAR) compared with the standalone system with an NPV of 290,930.73 (ZAR) and an LCOE of 2.57 (ZAR). However, the indirect value chain of the hybrid solution is associated with environmental emissions. The results obtained from the two scenarios could be used as a model for powering other urban hydroponic systems in other geospatial locations. While system effectiveness is highly prioritized, an economical scenario that mitigates the load shedding effects and enhances the productivity of the hydroponic food garden is very vital.
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Tang, Henry C. K., Tiger Y. S. Cheng, Joe C. Y. Wong, Ray C. C. Cheung, and Alan H. F. Lam. "Aero-Hydroponic Agriculture IoT System." In 2021 IEEE 7th World Forum on Internet of Things (WF-IoT). IEEE, 2021. http://dx.doi.org/10.1109/wf-iot51360.2021.9595205.

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Reports on the topic "Hydroponic"

1

Tranel, Larry F. Hydroponic Fodder Systems for Dairy Cattle? Ames (Iowa): Iowa State University, January 2013. http://dx.doi.org/10.31274/ans_air-180814-606.

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Blok, Chris, Erik van Os, Raed Daoud, Laith Waked, and A. Hasan. Hydroponic Green Farming Initiative : increasing water use efficiency by use of hydroponic cultivation methods in Jordan : final report. Bleiswijk: Wageningen University & Research, BU Greenhouse Horticulture, 2017. http://dx.doi.org/10.18174/426168.

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Katan, Jaacov, and Michael E. Stanghellini. Clinical (Major) and Subclinical (Minor) Root-Infecting Pathogens in Plant Growth Substrates, and Integrated Strategies for their Control. United States Department of Agriculture, October 1993. http://dx.doi.org/10.32747/1993.7568089.bard.

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In intensive agriculture, harmful soilborne biotic agents, cause severe damage. These include both typical soilborne (clinical) major pathogens which destroy plants (e.g. Fusarium and Phytophthora pathogens), and subclinical ("minor") pathogens (e.g. Olpidium and Pythium). The latter cause growth retardation and yield decline. The objectives of this study were: (1) To study the behavior of clinical (major) and subclinical (minor) pathogens in plant growth substrate, with emphasis on zoosporic fungi, such as Pythium, Olipidium and Polymyxa. (2) To study the interaction between subclinical pathogens and plants, and those aspects of Pythium biology which are relevant to these systems. (3) To adopt a holistic-integrated approach for control that includes both eradicative and protective measures, based on a knowledge of the pathogens' biology. Zoospores were demonstrated as the primary, if not the sole propagule, responsible for pathogen spread in a recirculating hydroponic cultural system, as verified with P. aphanidermatum and Phytophthora capsici. P. aphanidermatum, in contrast to Phytophthora capsici, can also spread by hyphae from plant-to-plant. Synthetic surfactants, when added to the recirculating nutrient solutions provided 100% control of root rot of peppers by these fungi without any detrimental effects on plant growth or yield. A bacterium which produced a biosurfactant was proved as efficacious as synthetic surfactants in the control of zoosporic plant pathogens in the recirculating hydroponic cultural system. The biosurfactant was identified as a rhamnolipid. Olpidium and Polymyxa are widespread and were determined as subclinical pathogens since they cause growth retardation but no plant mortality. Pythium can induce both phenomena and is an occasional subclinical pathogen. Physiological and ultrastructural studies of the interaction between Olpidium and melon plants showed that this pathogen is not destructive but affects root hairs, respiration and plant nutrition. The infected roots constitute an amplified sink competing with the shoots and eventually leading to growth retardation. Space solarization, by solar heating of the greenhouse, is effective in the sanitation of the greenhouse from residual inoculum and should be used as a component in disease management, along with other strategies.
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Sonneveld, Cees, and Wim Voogt. Complexvorming van spoorelementen in substraten en hydroponics : Een samenvatting van resultaten uit onderzoek en literatuur. Bleiswijk: Wageningen University & Research, BU Glastuinbouw, 2019. http://dx.doi.org/10.18174/472921.

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Raghothama, Kashchandra G., Avner Silber, and Avraham Levy. Biotechnology approaches to enhance phosphorus acquisition of tomato plants. United States Department of Agriculture, January 2006. http://dx.doi.org/10.32747/2006.7586546.bard.

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Abstract: Phosphorus is one of the least available macronutrient in the soil. The high affinity phosphate transporters are known to be associated with phosphate acquisition under natural conditions. Due to unique interactions of phosphate with soil particles, up to 80% of the applied phosphates may be fixed forcing the farmers to apply 4 to 5 times the fertilizers necessary for crop production. Efficient uptake and utilization of this essential nutrient is essential for sustainability and profitability of agriculture. Many predictions point to utilization/exhaustion of high quality phosphate rocks within this century. This calls for efforts to improve the ability of plants to acquire and utilize limiting sources of phosphate in the rhizosphere. Two important molecular and biochemical components associated with phosphate efficiency are phosphate transporters and phosphatases. This research project is aimed at defining molecular determinants of phosphate acquisition and utilization in addition to generating phosphate uptake efficient plants. The main objectives of the project were; Creation and analysis of transgenic tomato plants over-expressing phosphatases and transporters Characterization of the recently identified members (LePT3 and LePT4) of the Pi transporter family Generate molecular tools to study genetic responses of plants to Pi deficiency During the project period we have successfully identified and characterized a novel phosphate transporter associated with mycorrhizal symbiosis. The expression of this transporter increases with mycorrhizal symbiosis. A thorough characterization of mutant tomato lacking the expression of this gene revealed the biological significance of LePT3 and another novel gene LePT4. In addition we have isolated and characterized several phosphate starvation induced genes from tomato using a combination of differential and subtractive mRNA hybridization techniques. One of the genes, LePS2 belongs to the family of phospho-protein phosphatase. The functionality of the recombinant protein was determined using synthetic phosphor-peptides. Over expression of this gene in tomato resulted in significant changes in growth, delay in flowering and senescence. It is anticipated that phospho-protein phosphatase may have regulatory role in phosphate deficiency responses of plants. In addition a novel phosphate starvation induced glycerol 3-phosphate permease gene family was also characterized. Two doctoral research students are continuing the characterization and functional analysis of these genes. Over expression of high affinity phosphate transporters in tobacco showed increased phosphate content under hydroponic conditions. There is growing evidence suggesting that high affinity phosphate transporters are crucial for phosphate acquisition even under phosphate sufficiency conditions. This project has helped train several postdoctoral fellows and graduate students. Further analysis of transgenic plants expressing phosphatases and transporters will not only reveal the biological function of the targeted genes but also result in phosphate uptake and utilization efficient plants.
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