Bibliografie tematiche / Nutrient film technique

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Letteratura scientifica selezionata sul tema "Nutrient film technique"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 10 febbraio 2022

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Articoli di riviste sul tema "Nutrient film technique"

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Wibisono, Vicky, e Yudi Kristyawan. "An Efficient Technique for Automation of The NFT (Nutrient Film Technique) Hydroponic System Using Arduino". International Journal of Artificial Intelligence & Robotics (IJAIR) 3, n. 1 (31 maggio 2021): 44–49. http://dx.doi.org/10.25139/ijair.v3i1.3209.

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Hydroponic Nutrient Film Technique (NFT) is most widely applied on a home and industrial scale. One of the drawbacks of the NFT hydroponic system is that it is very dependent on electricity for 24 hours to power the water pump. The basic principle of the NFT hydroponic system is to flow nutrients to plant roots with a shallow and circulating nutrient layer so that plants get enough water, nutrients, and oxygen. Therefore, the role of the water pump in the hydroponic NFT system is crucial. This research makes the automation of the NFT hydroponic system more efficient using Arduino. There are two main parts to this automation system: the control of pH levels and nutrient distribution. The pH sensor is used to control the pH level of nutrients, and the ultrasonic sensor is used for nutrient distribution. Efficiency is emphasized more on the distribution of nutrients because it absorbs more electrical energy. The method used is to flow the nutrients in the reservoir to a storage tank that is located higher than the plant using a water pump with a large discharge. Nutrients are transported to each plant using the force of gravity. The nutrient volume is controlled automatically using an ultrasonic sensor in the storage tank. The water pump is only activated by the ultrasonic sensor readings on the storage tank. So that the need for electricity to turn on the water pump is reduced, based on tests carried out on the use of a 220-volt AC / 50 Hz / 125-watt water pump and the use of a 250-liter nutrient storage tank, it can be concluded that the system that has been created can save 70% of electricity consumption.
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Burrage, S. W. "NUTRIENT FILM TECHNIQUE IN PROTECTED CULTIVATION". Acta Horticulturae, n. 323 (febbraio 1993): 23–38. http://dx.doi.org/10.17660/actahortic.1993.323.1.

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Mortley, D. G., C. K. Bonsi, J. H. Hill e W. A. Hill. "NUTRIENT MANAGEMENT OF SWEETPOTATO GROWN IN NUTRIENT FILM TECHNIQUE". Acta Horticulturae, n. 548 (marzo 2001): 567–74. http://dx.doi.org/10.17660/actahortic.2001.548.70.

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Silva, Marina Galdez de Castro, Cristina Moll Hüther, Bruno Bernardo Ramos, Patrícia da Silva Araújo, Leonardo da Silva Hamacher e Carlos Rodrigues Pereira. "GLOBAL OVERVIEW OF HYDROPONICS: NUTRIENT FILM TECHNIQUE". Revista Engenharia na Agricultura - Reveng 29 (5 agosto 2021): 138–45. http://dx.doi.org/10.13083/reveng.v29i1.11679.

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Abstract (sommario):
Hydroponics is a cultivation technique without soil. There are several modalities for the system and among them is the Nutrient Film Technique (NFT), which consists of using channels to circulate a nutrient solution intermittently. Due to the existence of risks of soil and water contamination in metropolitan areas, hydroponics is a potential alternative to conventional production. Therefore, the present work sought to verify the current study of knowledge of the NFT hydroponic system in the international literature and the performance of the countries on it. For this, a bibliographic survey was carried out from 2010 to 2019 on the international research bases Science Direct, Portal de Periódicos da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and Scielo using the search terms “Hydroponics” and “Nutrient Film Technique Hydroponics”. An increase in the number of studies was observed in the last four years of the analyzed period, that is, from 2016 to 2019, thus representing an increase in interest in hydroponics, especially the NFT type. This increase may be related to the efficiency and ease of handling this model, gains in productivity and the potential that this technique has for reducing the carbon footprint. Thus, Nutrient Film Technique is of great value in urban agriculture, especially in Brazil – its greatest representative –, with the potential to grow a lot in the future, due to its numerous benefits.
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de Kreij, C., e H. Başar. "Effect of humic substances in nutrient film technique on nutrient uptake". Journal of Plant Nutrition 18, n. 4 (aprile 1995): 793–802. http://dx.doi.org/10.1080/01904169509364938.

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Mackowiak, C. L., R. M. Wheeler, G. W. Stutte e N. C. Yorio. "Peanut Production using Recirculating Nutrient Film Technique (NFT)". HortScience 30, n. 4 (luglio 1995): 810E—810. http://dx.doi.org/10.21273/hortsci.30.4.810e.

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As part of NASA's effort with bioregenerative life support systems, the growth of candidate crops is being investigated in controlled environments. Peanut (Arachis hypogaea L.) was selected for the high oil and protein content of its seed. Peanut cvs. Pronto and Early Bunch were grown from seed, using recirculating nutrient film technique (NFT) in 6-cm-deep, trapazoidal culture trays. The trays were fitted with slotted covers, which allowed developing pegs to reach the root zone. Use of a separate moss-filled pegging compartment above the root zone (tray within a tray) had little effect on seed yield, but resulted in a 60% increase in the nitric acid requirements for pH control. Yields from both cultivars were equivalent to field values on an area basis; however, harvest indices were lower than field values due to the luxuriant canopy growth under controlled environment conditions. Proximate analysis of seeds was similar to field values, with the exception of fat, which was ≈15% lower, and ash, which was ≈30% greater under controlled environment conditions, regardless of cultivar.
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Ibrahim, Muhammad Naufal Rauf, Mohamad Solahudin e Slamet Widodo. "Control System for Nutrient Solution of Nutrient Film Technique Using Fuzzy Logic". TELKOMNIKA (Telecommunication Computing Electronics and Control) 13, n. 4 (1 dicembre 2015): 1281. http://dx.doi.org/10.12928/telkomnika.v13i4.2113.

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Sumarni, Eni, Loekas Soesanto, Noor Farid e Hanif Nasiatul Baroroh. "PERTUMBUHAN DAN PERKEMBANGAN TANAMAN PURWOCENG PADA BUDIDAYA SECARA HIDROPONIK NUTRIENT FILM TECHNIQUE (NFT)". Jurnal Litbang Provinsi Jawa Tengah 15, n. 2 (1 dicembre 2017): 145–51. http://dx.doi.org/10.36762/litbangjateng.v15i2.410.

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Purwoceng sustainability is done in order to optimize its sustainable use. Therefore it is necessary to planting Purwoceng in a controlled and planned manner. Hydroponics is one of the alternative cultivation techniques for crop production without using soil, so it can be done in areas that are difficult to cultivate. Nutrient Film Technique (NFT) is one of the hydroponic techniques of water culture. The nutrients and water are administered to the plant in a circular in a shallow layer. NFT provides proper environmental control of root areas, as well as efficient water and plant nutrients. This study aims to obtain growth and development of medicinal plants Purwoceng NFT. The study was conducted from May to July 2017. The research location of Dieng Kulon at an altitude of 2.000 m asl. The Purwoceng plant was planted with NFT technique within 5 replications. The measurement results are shown in graphical. Indicators of nutritional adequacy using EC (Electrict Conductivity) and pH. EC nutrient used is 1-1.5 mS / cm for purwoceng 1-30 HST, 1.5-2 mS / cm for plants > 30 HST, pH used 5.5-6.5. The results showed that average growth of Purwoceng plants until the age of 50 HST reaches 7-9 cm. The number of branches of Purwoceng plants up to the age of 50 HST reaches 2-4 branches. The percentage of Purwoceng plants experiencing timber in the NFT system reached 40%. Therefore it is necessary to do further research how influence duration of nutrition to growth and result of Purwoceng.
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Suhl, Johanna, Berry Oppedijk, Daniela Baganz, Werner Kloas, Uwe Schmidt e Bert van Duijn. "Oxygen consumption in recirculating nutrient film technique in aquaponics". Scientia Horticulturae 255 (settembre 2019): 281–91. http://dx.doi.org/10.1016/j.scienta.2019.05.033.

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Yamasaki, A., A. Uragami e M. Yamada. "HYDROPONIC FORCING OF TULIP USING A NUTRIENT FILM TECHNIQUE". Acta Horticulturae, n. 570 (febbraio 2002): 423–27. http://dx.doi.org/10.17660/actahortic.2002.570.60.

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Più fonti

Tesi sul tema "Nutrient film technique"

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Kazakidou, Despina. "The effect of some environmental factors on carotenoid production in African marigold (Tagetes erecta L.)". Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246440.

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Incemehmetoglu, Ali. "Investigation The Effects Of Different Support Medium On Product With Nutrient Film Technique". Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615360/index.pdf.

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Hydroponics basically is the method of growing plants using mineral nutrient solutions, in water, without soil. Vertical nutrient film technique (NFT) is one of the most used hydroponic technique that has constant flow of nutrient solution. In this study the effects of different support medium on strawberry quality and yield using vertical NFT in glass greenhouse was investigated. NFT-only system was compared to rockwool, coco fiber, perlite and expanded clay as supporting medium for strawberry production. Parameters such as weight of product, amount of product, rate of marketable product, and including physico-chemical properties such as pH, rigidity, color, dry matter amount, EC, vitamin C, sugar content, resistance to certain pathogens were observed among all supporting medium trials. NFT-only system significantly differed from other supporting medium trails by most of the parameters including fruit number per plant, average fruit weight, toughness of the fruit, vitamin C amount, sugar amount and finally soluble solid material amount in water . Revealing the effects of supporting medium on strawberry production shed light on how should NFT must be applied to fruit growing.
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Cull, D. C. "Nutrient-Film Technique : The growth of sweet pepper in relation to iron and chelating agent". Thesis, University of Bath, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374596.

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Lima, Tiago José Leme de. "Desempenho de mudas de alface produzidas nos diferentes volumes de células em bandejas e cultivadas em sistema hidropônico". Universidade Federal de São Carlos, 2017. https://repositorio.ufscar.br/handle/ufscar/9175.

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The hydroponic cultivation of lettuce in the NFT (Nutrient Film Technique) system has use seedlings obtained in trays with smaller volumes, requiring two transplants (from the tray to the nursery and then to the definitive). The use of seedlings produced in larger volumes of cells could provide the transplant directly to the definitive profiles, besides possibly ensuring the smallest cycle of lettuce plant growth in this system. Thus, the objective of this work was to verify the performance of lettuce seedlings produced in different volumes of trays cells and their subsequente transplant aiming at precocity at harvest and exemption from the use of nursery phase in hydroponic NFT system. Two subsequent experiments were performed. In the first experiment, seedlings were grown and evaluated in different volumes cells of trays (50, 40, 35, 31, 30, 29, 27, 20 and 10 cm³ céll-1) and, after 40 days, in the second experiment, Were transplanted directly to the definitive profiles of the NFT, with exception of the seedlings produced in volume 10 cm³ cell-1 that first remained 10 days in the nursery before its definitive transplant. In both experiments, it was adopted a completely randomized block design with four replications. In the seedlings, the following characteristics were evaluated: Plant height (PH cm plant-1); Root lenght of seedlings (RLs cm plant-1); Total leaves of seedlings (TLs leaves plant-1); Fresh seedling aerial mass (FSAM g plant-1); Dry mass of the aerial part of the seedlings (DMAPS g plant-1); Fresh seedlings and root pasta (FSRP g plant-1); Dry mass of seedlings root (DMSR g plant-1). After the transplanting of lettuces in the NFT system, were evaluated at 22 days after transplant (DAT) and 29 (DAT) the characteristics: Number of leaves in senescence (NLS plant-1); Total leaves (TL plant-1); Fresh mass of the aerial part (FMAP g plant-1); Fresh root pasta (FRP g plant-1); Aerial shoot dry mass (ASDM g plant-1); Stem length (ST cm) and Productivity (Kg m-2). The best performance of the seedlings was ally with the increase in volume per cell of trays. After transplant, the best performance of lettuces was generated from the use of seedlings produced in larger cell volumes. In the volumes of 20 to 50 cm³ cell-1, there was no need for the nursery for the seedlings and the number of transplants reduced from two to one, contrary to the volume of 10 cm³ cell-1. Seedlings produced in trays with 40 and 50 cm³ cell-1 provided harvest at 22 DAT of cultivtion in the NFT system.
O cultivo hidropônico de alface em sistema NFT (Nutrient Film Technique) tem utilizado mudas obtidas em bandejas com volumes menores, exigindo dois transplantes (da bandeja para a fase intermediária e posteriormente para o definitivo). O uso de mudas produzidas em maiores volumes de célula poderia proporcionar o transplante diretamente aos perfis definitivos, além de, possivelmente assegurar o menor ciclo de cultivo de plantas de alface nesse sistema. Assim, o objetivo deste trabalho foi verificar o desempenho de mudas de alface produzidas em diferentes volumes de células de bandejas e seu posterior transplante visando a precocidade na colheita e dispensa da utilização da fase intermediária em sistema hidropônico NFT. Foram realizados dois experimentos subsequentes. No primeiro experimento, efetuou-se a produção e avaliação das mudas em diferentes volumes de células de bandejas (50, 40, 35, 31, 30, 29, 27 e 20 e 10 cm³ célula-1) e, após 40 dias, no segundo experimento, estas foram transplantadas diretamente aos perfis definitivos do NFT, com exceção das mudas produzidas no volume 10 cm³ célula-1 que primeiramente permaneceram 10 dias na fase intermediária antes do seu transplante no definitivo. Nos dois experimentos adotou-se o delineamento em blocos inteiramente casualizados, com quatro repetições. Nas mudas, avaliaram-se as características: Altura da planta (APm cm planta-1); Comprimento da raiz das mudas (CRm cm planta-1); Total de folhas das mudas (TFm folhas planta-1); Massa fresca da parte aérea das mudas (MFPAm g planta-1); Massa seca da parte aérea das mudas (MSPAm g planta-1); Massa fresca da raiz das mudas (MFRm g planta-1) e; Massa seca da raiz das mudas (MSRm g planta-1). Após o transplante das alfaces no sistema NFT, avaliaram-se aos 22 dias após transplante (DAT) e 29 (DAT), as características: Número de folhas em senescência (NFS planta-1); Total de folhas (TF planta-1); Massa fresca da parte aérea (MFPA g planta-1); Massa fresca da raiz (MFR g planta-1); Massa seca da parte aérea (MSPA g planta-1); Comprimento do caule (CC cm) e Produtividade (Kg m-2). O melhor desempenho das mudas esteve aliado ao aumento do volume por célula das bandejas. Após o transplante, o melhor desempenho das alfaces foi gerado da utilização de mudas produzidas em maiores volumes de célula. Nos volumes de 20 a 50 cm³ célula-1, não houve a necessidade da fase intermediária para as mudas e o número de transplantes reduziu de dois para um, contraio ao volume de 10 cm³ célula-1. Mudas produzidas nas bandejas com 40 e 50 cm³ célula-1 proporcionaram colheita aos 22 DAT de cultivo no sistema NFT.
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Dalastra, Cleiton [UNESP]. "Nutrição e produção de alface americana em função da vazão, periodicidade de exposição e condutividade elétrica da solução nutritiva em sistema hidropônico". Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152065.

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A produção de alimento face a demanda mundial é um desafio para este século, devendo-se, obrigatoriamente, destinar atenção ao ganho de eficiência produtiva, incorporada as tecnologias disponíveis. Dentre as hortaliças folhosas, a alface se destaca em toda culinária global. A produção atual da alface tem passado por grandes avanços, atribuídos especialmente à técnica de produção hidropônica, contudo, ainda é necessita melhorias na adaptabilidade da tecnologia hidropônica às condições climáticas das diversas regiões e às diferentes necessidades da gama de cultivares presentes no mercado. Neste cenário, a proposição desta pesquisa surge em resposta à demanda de informações pelo setor produtivo, cumprindo seu papel na integração entre ensino, pesquisa e extensão rural, de maneira a contribuir modestamente com o setor produtivo. Para isso, foram realizados três experimentos isolados em sistema hidropônico NFT (Técnica de Fluxo Laminar de Nutrientes), com o objetivo de avaliar a nutrição e a produção econômica de alface americana em função da vazão, periodicidade de exposição e condutividade elétrica da solução nutritiva, respectivamente. O delineamento experimental foi em blocos casualisados, com cinco repetições e cada tratamento foi composto por 15 plantas. No experimento 1, os tratamentos utilizados constaram da aplicação de solução nutritiva nas vazões de 0,5; 1; 2 e 4 litros por minuto em cada canal de cultivo. No experimento 2, os tratamentos foram quatro combinações de intermitência de exposição da solução nutritiva em intervalos de bombeamento / intervalo de ausência de bombeamento em minutos: 15/60; 15/30; 15/15 e FI (Fluxo initermitente). No experimento 3, os tratamentos foram a manutenção diária da solução nutritiva em quatro valores de condutividade elétrica, de 0,8; 1,3; 1,8 e 2,3 dS m-1, em função da concentração de nutrientes. A maior produção e lucratividade de alface americana foi obtida com a vazão da solução nutritiva de 1 L/min, devido ao maior acúmulo de nutrientes na parte aérea e eficiência de sua utilização; também houve a maior produção e lucratividade de alface americana obtida com fluxo contínuo da solução nutritiva (FI), devido ao maior acúmulo de nutrientes na parte aérea e raízes, maior assimilação de nitrato e eficiência de utilização de nutrientes; economicamente, a condução em intervalo 15/30 minutos acarreta em prejuízo financeiro; o acompanhamento dos tratamentos de condutividade elétrica no decorrer do ciclo da alface aponta para produção superior com condutividade elétrica recomendada por fase de cultivo, sendo: 0,8 dS m-1 até os 10 dias após o transplantio (DAT); 1,30 dS m-1 dos 10 aos 17 DAT; 1,80 dS m-1 dos 17 aos 24 DAT e 1,30 dS m-1 dos 24 aos 31 DAT.
The food production to meet global demand is a challenge for this century, should be compulsorily intended attention to productive efficiency gains incorporated the available technologies. Among the leafy vegetables, the lettuce stands out in all global cuisine. The current production of lettuce has undergone great advances, especially attributed to the hydroponic production technique. However, it is still necessary to improve the adaptability of hydroponic technology to the climatic conditions of the different regions and to the different needs of the wide range of cultivars present in the market. In this scenario, the proposition of this research arises in response to the demand for information by the productive sector, fulfilling its role in the integration between teaching, research and rural extension, in order to contribute modestly with the productive sector. For that, three experiments were carried out in a NFT hydroponic system, with the objective of evaluating the nutrition and economic production of American lettuce as a function of flow rate, periodicity of exposure and electrical conductivity of the nutrient solution, respectively. The experimental design was in randomized blocks, with five replicates and each treatment consisted of 15 plants. In the experiment 1, the treatments used consisted of the application of nutrient solution at the flow rates of 0.5; 1; 2 and 4 liters per minute in each culture channel. In experiment 2, the treatments were four combinations of intermittent exposure of the nutrient solution at pumping intervals / no pumping interval in minutes: 15/60; 15/30; 15/15 and 15/0. In experiment 3, the treatments were daily maintenance of the nutrient solution in four values of electrical conductivity, of 0.8; 1,3; 1.8 and 2.3 dS m-1, depending on the concentration of nutrients. The conclusions were: The highest production and profitability of American lettuce was obtained with the flow of the nutrient solution of 1 L/min, due to the greater accumulation of nutrients in the aerial part and efficiency of use of these; The highest production and profitability of American lettuce was with cycles of 15/0 minutes, that is, with continuous flow of the nutrient solution due to the greater accumulation of nutrients in the aerial part and efficiency of use of these; Economically, driving in interval 15/30 minutes under the conditions studied, does not supply the cost of production and entails financial loss; The treatments were monitored during the lettuce cycle, indicating a higher yield than the one obtained with the recommended electrical conductivity at each cultivation stage: 0.8 dS m-1 until 10 days after transplanting (DAT) of lettuce; 1.30 dS m-1 from 10 to 17 DAT; 1.80 dS m-1 from 17 to 24 DAT and 1.30 dS m-1 from 24 to 31 DAT.
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Dalastra, Cleiton. "Nutrição e produção de alface americana em função da vazão, periodicidade de exposição e condutividade elétrica da solução nutritiva em sistema hidropônico /". Ilha Solteira, 2017. http://hdl.handle.net/11449/152065.

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Orientador: Marcelo Carvalho Minhoto Teixeira Filho
Resumo: A produção de alimento face a demanda mundial é um desafio para este século, devendo-se, obrigatoriamente, destinar atenção ao ganho de eficiência produtiva, incorporada as tecnologias disponíveis. Dentre as hortaliças folhosas, a alface se destaca em toda culinária global. A produção atual da alface tem passado por grandes avanços, atribuídos especialmente à técnica de produção hidropônica, contudo, ainda é necessita melhorias na adaptabilidade da tecnologia hidropônica às condições climáticas das diversas regiões e às diferentes necessidades da gama de cultivares presentes no mercado. Neste cenário, a proposição desta pesquisa surge em resposta à demanda de informações pelo setor produtivo, cumprindo seu papel na integração entre ensino, pesquisa e extensão rural, de maneira a contribuir modestamente com o setor produtivo. Para isso, foram realizados três experimentos isolados em sistema hidropônico NFT (Técnica de Fluxo Laminar de Nutrientes), com o objetivo de avaliar a nutrição e a produção econômica de alface americana em função da vazão, periodicidade de exposição e condutividade elétrica da solução nutritiva, respectivamente. O delineamento experimental foi em blocos casualisados, com cinco repetições e cada tratamento foi composto por 15 plantas. No experimento 1, os tratamentos utilizados constaram da aplicação de solução nutritiva nas vazões de 0,5; 1; 2 e 4 litros por minuto em cada canal de cultivo. No experimento 2, os tratamentos foram quatro combinações de int... (Resumo completo, clicar acesso eletrônico abaixo)
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Chang, Hao-Wei, e 張皓崴. "The Thermal Analysis and Optimization of Nutrient Film Technique with Shallow Geothermal Energy". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/njesyn.

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碩士
國立臺灣大學
機械工程學研究所
105
Temperature of Nutrient Film Technique(NFT) is one of the types of Hydroponics. As compared to other Hydroponics, it can be controlled by temperature. The purpose of this study is to derive the mathematical model by heat transfer analysis, and the model can be used to predict the changes of the temperature with different operating and environmental conditions. This study used MATLAB to simulate the changes of the temperature of NFT during the summer time based on Steady State, Incompressible Flow, Navier-Stokes equations, and Thermal Resistance Analysis. According to the results of numerical analysis, with 35 °C ambient temperature and 40 °C the top of the planting tube, if we only change the input water temperature and its flow rate, the temperature of the water in the planting tube can reach the target temperature (15 ~ 24 °C), but the temperature of the air in the planting tube cannot reach the target temperature. Therefore, we need to change the parameters of hardware to optimize the design. This study used Taguchi Method and Gray Relation Analysis to approach the optimum parametric combination, with the considering of the temperature of NFT and the power consumption. The parameters include cooling method of heat pump, volume flow rate of water, wide of planting tube, temperature of inlet water of planting tube, and slope of planting tube. The result show, cooling method of heat pump with Shallow Geothermal Energy, volume flow rate of water of 2 (L/min), wide of planting tube of 0.06 (m), temperature of inlet water of planting tube of 16 (°C), and slope of planting tube of 4 % is the best in all level for system. According to the results of optimization, the highest temperature of water of inside planting tube of 21.66 (°C) can be reduced to 17.87 (°C), the highest temperature of air of inside planting tube of 30.65 (°C) can be reduced to 25.14 (°C), and power consumption of planting tube can save 53%. Shallow Geothermal Energy accounts for 43% of the contribution in the saving energy. According to the results of simulating operation, it''s payback period is 5 months, and it can reduce carbon emission by 1,000 (kg) monthly.
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Mason, Sean David. "Diffusive gradients in thin films (DGT) as a technique to predict nutrient availability to plants". 2007. http://hdl.handle.net/2440/57973.

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The soils of Australia have extensive macro and micronutrient disorders varying greatly in their capacities to provide the chemical nutrients essential for plant growth. Assessment of nutrient availability in soils is important in order to maximise fertilizer efficiency and crop yields and to minimise environmental pollution associated with over fertilisation. Nutrient availability has proven difficult to assess due to the complexity of trace element soil chemistry and plant uptake mechanisms. The relatively new method, Diffusive Gradients in Thin Films ( DGT ), provides the potential to become an alternative soil test that could accurately predict nutrient availability. To date, DGT technology has only been designed for separate assessment of anionic and cationic species in waters or soils typically at concentrations characteristic of highly contaminated systems. In this study a new mixed binding gel ( MBL ) was developed capable of simultaneous assessment of cations and anions in a single assay at concentrations more representative of uncontaminated agricultural soils, sediments and waters. The MBL has the potential to eliminate measurement errors associated with very fine spatial scale changes in element concentrations in these environments. The MBL consisted of ferrihydrite and Chelex - 100 cation exchange resin combined together in a binding gel. Results from the MBL were comparable to experiments performed using individual Chelex gels and ferrihydrite gels that have been shown to work successfully for DGT methodology. To facilitate combined analysis of P and cations by ICP - MS, HCl ( 1 M ) was used for gel elution to minimise interferences from [superscript 14] N [superscript 16] OH or [superscript 15] N [superscript 16] O on [superscript 31] P. All elements tested ( Cd, Cu, Mn, Mo, P and Zn ) were bound successfully to the MBL. DGT measurements obtained using the MBL on agricultural soils correlated well ( r ? = 0.95 ) with measurements obtained using pure Chelex and ferrihydrite binding layers. This suggests that the MBL could be used for simultaneous measurement of cationic and anionic element availability in soils. Performance of the Diffusive Gradient in Thin Films ( DGT ) technique was compared with three other common testing methods ( Colwell, Olsen, Resin ) for available soil P in terms of the ability of each to predict wheat, canola, lupin and barley responsiveness to applied P on 21 Australian agricultural soils. DGT accurately predicted plant responsiveness in > 90 % of the soils used. In contrast the other soil testing methods failed to correctly predict plant response to P on numerous occasions. These observations reveal that the DGT technique with the newly developed MBL can predict plant available P on these soils with greater accuracy than other traditional soil P testing methods and could become a useful tool for predicting P fertilizer requirements. The DGT method using the MBL was also used to test Zn deficiency thresholds for canola and wheat in a manufactured soil ( acid washed sand ). DGT successfully determined the threshold for Zn deficiency in this soil, overcoming detection limit issues usually accompanying such low levels of Zn. This method also provides that potential to assess other micronutrients ( Mn, Cu ) and with further modification potentially assess K. Before DGT can become established as an alternative soil testing method, validation of the performance is required under field conditions. This study has shown that it out performs current common soil testing methods in glasshouse conditions but questions still remain if this will be reflected out in the field.
Thesis (Ph.D.)-- University of Adelaide, School of Earth and Environmental Sciences, 2007.
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Libri sul tema "Nutrient film technique"

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Gilbert, Henry. Hydroponics-nutrient film technique, 1981-1986: 197 citations. Beltsville, Md: U.S. Dept. of Agriculture, National Agricultural Library, 1987.

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Gilbert, Henry. Hydroponics/nutrient film technique, 1979-85: 187 citations. Beltsville, Md: U.S Dept. of Agriculture, National Agricultural Library, 1985.

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Gilbert, Henry. Hydroponics/nutrient film technique 1982-May 1988: 233 citations. Beltsville, Md: U.S. Dept. of Agriculture, National Agricultural Library, 1988.

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Gilbert, Henry. Hydroponics - nutrient film techniques: January 1983 - December 1991. Beltsville, Md: National Agricultural Library, 1992.

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5

L, Mackowiak C., e United States. National Aeronautics and Space Administration., a cura di. Effect of carbon dioxide enrichment on radish production using Nutrient Film Technique (NFT). [Washington, DC: National Aeronautics and Space Administration, 1994.

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The ABC of NFT , Nutrient Film Technique : The World's first method of Crop Production without a solid rooting medium. Casper Publications Pty Ltd, 2002.

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Hydroponics Nutrient Film Techniques: January 1984-March 1994. Diane Pub Co, 1994.

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Capitoli di libri sul tema "Nutrient film technique"

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Graves, Chris J. "The Nutrient Film Technique". In Horticultural Reviews, 1–44. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118060728.ch1.

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Mohammed, Stephanie. "Introduction to Nutrient Film Technique". In Tomorrow's Agriculture, 7–11. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99202-0_2.

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Mohammed, Stephanie. "Formula for Nutrient Film Technique". In Tomorrow's Agriculture, 25–26. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99202-0_5.

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Mohammed, Stephanie. "Nutrient Film Technique Greenhouse Set-up". In Tomorrow's Agriculture, 15–24. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99202-0_4.

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Grote, D. "Quantification of Phytophthora Nicotianae on Tomatos Grown with The Nutrient Film Technique (NFT)". In Developments in Plant Pathology, 495–97. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0043-1_109.

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Morgan, Lynette. "Hydroponic System - Solution Culture." In Hydroponics and protected cultivation: a practical guide, 61–76. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0061.

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Abstract This paper discusses about the solution culture or 'hydroculture' systems, which are methods of crop production which do not employ the use of substrates to contain the root system and hold moisture between irrigations. It includes NFT or the nutrient film technique, deep water culture/deep flow technique - float, raft or pond systems, aeroponics, aquaponics, organic solution culture, hydroponic fodder systems, and automation for solution culture systems.
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Morgan, Lynette. "Hydroponic System - Solution Culture." In Hydroponics and protected cultivation: a practical guide, 61–76. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244830.0005.

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Abstract (sommario):
Abstract This paper discusses about the solution culture or 'hydroculture' systems, which are methods of crop production which do not employ the use of substrates to contain the root system and hold moisture between irrigations. It includes NFT or the nutrient film technique, deep water culture/deep flow technique - float, raft or pond systems, aeroponics, aquaponics, organic solution culture, hydroponic fodder systems, and automation for solution culture systems.
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Postma, J. W. M., e W. G. Keltjens. "The use of nutrient-film technique for monitoring Al (Al citrate) effects on root development and nutrient uptake in roots of Triticum aestivum L." In Plant Nutrition, 496–97. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47624-x_240.

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"Nutrient Film Technique". In Hydroponic Food Production, 145–97. CRC Press, 2012. http://dx.doi.org/10.1201/b12500-7.

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"Nutrient Film Technique (NFT)". In Microbial Biotechnology in Horticulture, Vol. 1, 42. CRC Press, 2006. http://dx.doi.org/10.1201/9781482280432-8.

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Atti di convegni sul tema "Nutrient film technique"

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Shankar, Abhai, Anju K., Giya ., Ajith Abraham e Jawahar Saud S. "Sewage Treatment using Nutrient Film Technique". In Proceedings of the Advances in Technology, Engineering and Computing A Multinational Colloquium - 2017. Singapore: Research Publishing Services, 2017. http://dx.doi.org/10.3850/978-981-11-0744-3_c17-24.

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Mashumah, Siti, Muhammad Rivai e Astria Nur Irfansyah. "Nutrient Film Technique based Hydroponic System Using Fuzzy Logic Control". In 2018 International Seminar on Intelligent Technology and Its Applications (ISITIA). IEEE, 2018. http://dx.doi.org/10.1109/isitia.2018.8711201.

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Iswanto, Prisma Megantoro e Alfian Ma'arif. "Nutrient Film Technique for Automatic Hydroponic System Based on Arduino". In 2020 2nd International Conference on Industrial Electrical and Electronics (ICIEE). IEEE, 2020. http://dx.doi.org/10.1109/iciee49813.2020.9276920.

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Helmy, Marsha Gresia Mahaidayu, Arif Nursyahid, Thomas Agung Setyawan e Abu Hasan. "Nutrient Film Technique (NFT) hydroponic monitoring system based on wireless sensor network". In 2017 IEEE International Conference on Communication, Networks and Satellite (Comnetsat). IEEE, 2017. http://dx.doi.org/10.1109/comnetsat.2017.8263577.

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Zaini, A., A. Kurniawan e A. D. Herdhiyanto. "Internet of Things for Monitoring and Controlling Nutrient Film Technique (NFT) Aquaponic". In 2018 International Conference on Computer Engineering, Network and Intelligent Multimedia (CENIM). IEEE, 2018. http://dx.doi.org/10.1109/cenim.2018.8711304.

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Puno, John Carlo V., Jenskie Jerlin I. Haban, Jonnel D. Alejandrino, Argel A. Bandala e Elmer P. Dadios. "Design of A Nutrient Film Technique Hydroponics System with Fuzzy Logic Control". In TENCON 2020 - 2020 IEEE REGION 10 CONFERENCE (TENCON). IEEE, 2020. http://dx.doi.org/10.1109/tencon50793.2020.9293749.

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Mortley, D. G., C. K. Bonsi, W. A. Hill e C. E. Morris. "Daily Light Period Influences Pod Yield, Harvest Index, and Flowering of Peanut Grown in Nutrient Film Technique". In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2002. http://dx.doi.org/10.4271/2002-01-2488.

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Hepriyadi, Selvy Uftovia, Intan Dwi Kurniawati, Wilda Prihasty e Hendra Cordova. "Analysis of AB nutrient film technique variation towards chlorophyll concentration of lettuce (Lactuca Sativa) on integrated hydroponic system". In ADVANCED INDUSTRIAL TECHNOLOGY IN ENGINEERING PHYSICS. Author(s), 2019. http://dx.doi.org/10.1063/1.5095349.

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Eridani, Dania, Olivia Wardhani e Eko Didik Widianto. "Designing and implementing the arduino-based nutrition feeding automation system of a prototype scaled nutrient film technique (NFT) hydroponics using total dissolved solids (TDS) sensor". In 2017 4th International Conference on Information Technology, Computer, and Electrical Engineering (ICITACEE). IEEE, 2017. http://dx.doi.org/10.1109/icitacee.2017.8257697.

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