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No. of bitstreams: 1 DissTJLL: 1290412 bytes, checksum: 0b28361bb68784461caec72b35759be1 (MD5) Previous issue date: 2017-04-05 / Não recebi financiamento / 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.

An experiment was conducted to evaluate the potential of producing dwarf tomatoes (Solanum lycopersicum L.) in an indoor vertical system. Cultivars 'Micro Tom', 'Jochalos', and 'Venus' were grown under the three daily light integral (DLI) levels of 16.9, 22.7, and 27.9 mol·m-2·day-1. Cultivar had an effect on height, with Jochalos being the tallest. Plants grown under 27.9 mol·m-2·day-1 were the shortest. The time of first flower was affected by cultivar, appearing earliest in Micro Tom. Regarding DLI, the first flower was earliest in plants under 22.7 and 27.9 mol·m-2·day-1. The time of first harvest was only affected by cultivar, in which Micro Tom was earliest. There was an interaction effect for the total and marketable fruit count harvested. Micro Tom had the highest overall number of fruits harvested amongst cultivars, and Micro Tom grown under 22.7 and 27.9 mol·m-2·day-1 had more total and marketable fruit counts than those grown under 16.9 mol·m-2·day-1. There was no interaction effect for fruit weight harvested. The effect of cultivar differed between the total and marketable fruit weights harvested, but Jochalos produced the highest weights in both. The effect of DLI was the same for total and marketable fruit weights harvested, with plants under 22.7 and 27.9 mol·m-2·day-1 having the highest weights. Cultivar had an effect on fruit Brix, with Micro Tom fruit having the lowest Brix and Jochalos fruit having the highest Brix. The effect of DLI resulted in fruits produced by plants under 27.9 mol·m-2·day-1 having the highest Brix and fruits produced by plants under 16.9 mol·m-2·day-1 having the lowest. Based on these results, there is potential for dwarf tomatoes to be grown in vertical farm systems. / Master of Science in Life Sciences / An experiment was conducted to evaluate the potential of producing dwarf tomatoes (Solanum lycopersicum L.) in an indoor vertical system. Cultivars 'Micro Tom', 'Jochalos', and 'Venus' were grown under the three daily light integral (DLI) levels of 16.9, 22.7, and 27.9 mol·m-2·day-1. Cultivar had an effect on height, with Jochalos being the tallest. For DLI, all plants grown under 27.9 mol·m-2·day-1 were the shortest. The time of first flower was affected by cultivar, appearing earliest in Micro Tom. Regarding DLI, the first flower was earliest in plants under the higher DLIs. The time of first harvest was only affected by cultivar, in which Micro Tom was earliest. There was an interaction effect for the total and marketable fruit count harvested. Micro Tom had the highest overall number of fruits harvested under the highest DLIs. There was no interaction effect for fruit weight harvested. In cultivars, Jochalos produced the highest weights for both total and marketable fruits. Plants under 22.7 and 27.9 mol·m-2·day-1 had the highest weights for total and marketable fruits harvested. Cultivar had an effect on fruit Brix, with Micro Tom fruit having the lowest Brix and Jochalos fruit having the highest. Uninfluenced by cultivar, fruits produced by plants under 27.9 mol·m-2·day-1 had the highest Brix, while those under 16.9 mol·m-2·day-1 had the lowest. Based on these results, there is potential for dwarf tomatoes to be grown in vertical farm systems.

The objective of this project is to produce a prototype hydroponic farming solution with improved robustness from external fault factors. This means that the plants will not be grown in soil, but instead in water with a majority of its parameters being monitored and regulated. This with the aim of producing a more efficient and automatic system than traditional farming principles. Using less water and other harmful pesticides. The particular type of hydroponic system will be a NFT system (Nutrient Film Technique) which traditionally operates with a pump constantly feeding water to the plants. The main objective then is to find a way to reduce the reliance on this pump and make the system more robust. The result was a prototype hydroponic system that successfully could monitor and maintain predetermined growth parameters. It was also operate with a constant water flow without the need for constant pump usage. / Målet med detta projekt är att framställa en prototyp av ett hydroponiskt odlingssystem med förbättrad robusthet mot externa faktorer. Det innebär att växterna inte planteras i jord utan i vatten, där en majoritet av relevanta parametrar kan övervakas och kontrolleras. Detta med syftet att skapa ett mer effektivt och automatiserat system, jämfört mot traditionella jorbruksmetoder. Där mindre vatten används och helt utan bekämpningsmedel under växt processen. Det specifika hydroponiska odlingssystemet som kommer användas är ett NFT system (eng. Nutrient Film Technique) vilket traditionellt fungerar genom att konstant låta en pump bevattna växterna. Det primära målet är därför att minska beroendet på pumpen och göra systemet mer robust. Resultatet blev en prototyp av ett hydroponiskt system som kan mäta och styra faktorer som identifierats som viktiga för plantornas växtprocess. Systemet lyckades även med att hålla ett stabilt vattenflöde, utan användandet av en pump.

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.

The response of cucumber (Cucumis sativus L.) plants to various root and shoot environments (solution depth, temperature, ionic strength, nitrogen and calcium level and light intensity) were studied. Cucumber plants were grown in continuously circulating-solution in a heated-glasshouse. Dry weights of leaves, stems and roots, leaf area, leaf number, root length and root number were measured as well as uptake of potassium, calcium and nitrogen. The relationship between shoot and root in terms of functional equilibrium equations was also examined. The results presented show that: 1. Shoot growth of cucumber plants was reduced if grown in solutions of less than 50mm in depth; 2. When roots were grown in shallow solution depths at 1 or 5mm the dry weight allocated to the root increased. The ratio of root number/root length(no./cm) also increased. Lowering solution temperature to 12.5±2.5°C enhanced the production of root number relctive to root length, and 5 and 2% of full strength and 5% of full strength nitrogen level solution stimulated the growth of root length relative to root number; 3. Under low solution temperature treatment leaf number was maintained at the expense of leaf area. Under low total ionic strength and low nitrogen solution, enhanced root length growth was at the expense of leaf area growth; 4. Low solution temperature enhanced the dry weight allocated to the stem relative to the leaf. Low total ionic strength and low nitrogen solution increased the dry weight allocated to the leaf relative to the stem; 5. The specific activity of root, represented by specific absorption rate, increased when the shoot was under light stress and, the specific activity of shoot, represented by unit shoot rate, increased when the root was under nitrogen-stress; 6. The form of equation developed by Thornley (ΔM = fmΔW, where ΔM is the increment in weight of element M and ΔW the increment in total plant dry weight during a time period Δt with fm a constant) showed a better relationship than the equation developed by Davidson [root mass x rate(absorption) ∝ leaf mass x rate(photosynthesis)] and subsequently used by Hunt in the form of mass ratio(root/shoot) ∝ l/activity ratio; 7. The equation developed by Chung et al, total plant weight/(leaf number/leaf area) ∝ total "k"/(root number/root length), where k represents the total contents of elements or compounds, showed a good approximation of the relationship between shoot and root under all the environmental stresses imposed with the exception of calcium uptake. The results support the concept that the activity of the root or shoot in carrying out its function is influenced by the demand created by the opposite organ and appears to be a better assumption than that which proposes that the activity of an organ is solely dependent on its own size.

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) / Doutor

Submitted by CLEITON DALASTRA null (sauems@gmail.com) on 2017-10-29T21:52:25Z No. of bitstreams: 1 Cleiton Dalastra_29_10_2017_ PG Agronomia.pdf: 4821380 bytes, checksum: fad04c9fa5853e9c381aeb892db6a996 (MD5) / Approved for entry into archive by LUIZA DE MENEZES ROMANETTO (luizamenezes@reitoria.unesp.br) on 2017-11-09T15:35:04Z (GMT) No. of bitstreams: 1 dalastra_c_dr_ilha.pdf: 4821380 bytes, checksum: fad04c9fa5853e9c381aeb892db6a996 (MD5) / Made available in DSpace on 2017-11-09T15:35:04Z (GMT). No. of bitstreams: 1 dalastra_c_dr_ilha.pdf: 4821380 bytes, checksum: fad04c9fa5853e9c381aeb892db6a996 (MD5) Previous issue date: 2017-08-31 / 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.

The response of cucumber (Cucumis sativus L.) plants to various root and shoot environments (solution depth, temperature, ionic strength, nitrogen and calcium level and light intensity) were studied. Cucumber plants were grown in continuously circulating-solution in a heated-glasshouse. Dry weights of leaves, stems and roots, leaf area, leaf number, root length and root number were measured as well as uptake of potassium, calcium and nitrogen. The relationship between shoot and root in terms of functional equilibrium equations was also examined. The results presented show that: 1. Shoot growth of cucumber plants was reduced if grown in solutions of less than 50mm in depth; 2. When roots were grown in shallow solution depths at 1 or 5mm the dry weight allocated to the root increased. The ratio of root number/root length(no./cm) also increased. Lowering solution temperature to 12.5±2.5°C enhanced the production of root number relctive to root length, and 5 and 2% of full strength and 5% of full strength nitrogen level solution stimulated the growth of root length relative to root number; 3. Under low solution temperature treatment leaf number was maintained at the expense of leaf area. Under low total ionic strength and low nitrogen solution, enhanced root length growth was at the expense of leaf area growth; 4. Low solution temperature enhanced the dry weight allocated to the stem relative to the leaf. Low total ionic strength and low nitrogen solution increased the dry weight allocated to the leaf relative to the stem; 5. The specific activity of root, represented by specific absorption rate, increased when the shoot was under light stress and, the specific activity of shoot, represented by unit shoot rate, increased when the root was under nitrogen-stress; 6. The form of equation developed by Thornley (∆M = fm∆W, where ∆M is the increment in weight of element M and ∆W the increment in total plant dry weight during a time period ∆t with fm a constant) showed a better relationship than the equation developed by Davidson [root mass x rate(absorption) ∝ leaf mass x rate(photosynthesis)] and subsequently used by Hunt in the form of mass ratio(root/shoot) ∝ l/activity ratio; 7. The equation developed by Chung et al, total plant weight/(leaf number/leaf area) ∝ total "k"/(root number/root length), where k represents the total contents of elements or compounds, showed a good approximation of the relationship between shoot and root under all the environmental stresses imposed with the exception of calcium uptake. The results support the concept that the activity of the root or shoot in carrying out its function is influenced by the demand created by the opposite organ and appears to be a better assumption than that which proposes that the activity of an organ is solely dependent on its own size.

No description available.