Abstract:Concerning the baby leaf production in trays, substrate can be reused for a certain number of times depending on its chemical and physical characteristics, but populations of pathogens such as Pythium aphanidermatum and Rhizoctonia solani that can cause damping off of lettuce, can build up during the reuse of this substrate. Solar treatment in a solar collector can be an alternative for the disinfestation of these substrates. Thus, the objective of this research was to study the reuse of coconut fiber substrat… Show more
“…Cardoso et al (2010) observed a decrease in the percentage of aeration space and a consequent increase in water availability to melon plants cultivated in the reused substrate, but like the present study, productivity was not affected by reuse. Moraes et al (2016) and Purquerio et al (2016) also highlighted the advantage of reused coconut substrates over the first-use substrate in the lettuce baby leaf production without any productivity losses.…”
Minituber production is an important step to obtain high-quality seed potatoes. This production is carried out in a greenhouse using a large volume of commercial substrate acquired in specialized trade. An alternative to reduce the volume of substrate purchased for each production of minitubers would be to reuse it, which would be a way to optimize its use. The objective of this study was to evaluate the efficiency of reused substrates in the minituber production. The experiment was conducted in Tapira-MG with the Atlantic potato cultivar. The experimental design was a randomized block with six treatments and four replications, where each plot was represented by a box (0.15 x 0.4 x 0.5m: height, width, and length, respectively) containing substrates. Treatments consisted of formulation 04-14-08 rates (0, 25, 50, 75, and 100 g box-1) added to reused substrate and a control consisting of a new virgin substrate. At 45 days after transplanting, the following characteristics were evaluated: stem size (cm), and quantities of fresh and dry matter of aerial part of plants. Harvesting was performed manually, counting, and calculating the yield of tubers according to class. The reuse substrate with enriched nutrient regardless of the rate, when compared to the use of a new virgin substrate, did not interfere in potato plant development and in the total productivity of minitubers of classes I, II, III, and IV. This can be a feasible alternative for optimizing the use of the virgin substrate. The rate of 25 g box-1 of 4-14-8 is sufficient to provide the needs of potato in nutrients, ensuring high productivity.
“…Cardoso et al (2010) observed a decrease in the percentage of aeration space and a consequent increase in water availability to melon plants cultivated in the reused substrate, but like the present study, productivity was not affected by reuse. Moraes et al (2016) and Purquerio et al (2016) also highlighted the advantage of reused coconut substrates over the first-use substrate in the lettuce baby leaf production without any productivity losses.…”
Minituber production is an important step to obtain high-quality seed potatoes. This production is carried out in a greenhouse using a large volume of commercial substrate acquired in specialized trade. An alternative to reduce the volume of substrate purchased for each production of minitubers would be to reuse it, which would be a way to optimize its use. The objective of this study was to evaluate the efficiency of reused substrates in the minituber production. The experiment was conducted in Tapira-MG with the Atlantic potato cultivar. The experimental design was a randomized block with six treatments and four replications, where each plot was represented by a box (0.15 x 0.4 x 0.5m: height, width, and length, respectively) containing substrates. Treatments consisted of formulation 04-14-08 rates (0, 25, 50, 75, and 100 g box-1) added to reused substrate and a control consisting of a new virgin substrate. At 45 days after transplanting, the following characteristics were evaluated: stem size (cm), and quantities of fresh and dry matter of aerial part of plants. Harvesting was performed manually, counting, and calculating the yield of tubers according to class. The reuse substrate with enriched nutrient regardless of the rate, when compared to the use of a new virgin substrate, did not interfere in potato plant development and in the total productivity of minitubers of classes I, II, III, and IV. This can be a feasible alternative for optimizing the use of the virgin substrate. The rate of 25 g box-1 of 4-14-8 is sufficient to provide the needs of potato in nutrients, ensuring high productivity.
“…Esse substrato de origem vegetal natural, além de renovável é bastante leve. Oferta diversos benefícios como durabilidade extensa sem alteração de suas características físicas, ausência de patógenos, baixo custo para o produtor quando comparado a outros substratos e ainda a possibilidade de esterilização (MORAES et al, 2016).…”
A presente pesquisa teve como objetivo avaliar o crescimento e desenvolvimento da cultura pimenta biquinho (Capsicum chinese) em diferentes substratos, utilizado como base o sistema semi-hidrôponico em duas fases (30 e 60 dias após o transplantio - DAT). Para tal, as unidades experimentais foram distribuídas em um delineamento inteiramente casualizado, com utilização de dois substratos (S1- areia lavada e S2- fibra de coco), duas fases (F1- 30 DAT e F2-60 DAT) e 6 repetições cada, totalizando 12 unidades experimentais. As variáveis analisadas foram de crescimento e desenvolvimento (número de folha, diâmetro do caule, altura da planta, área foliar). Podendo observar melhor desenvolvimento para o tratamento S1, mesmo sem obter diferença significativa entre o parâmetro eficiência do uso da água. Resultado indica que a produção de pimenta biquinho no sistema de cultivo semi-hidropônico tendo como substrato a areia lavada contribuem para um excelente desenvolvimento da cultura e que possivelmente irá proporcionar maior desempenho produtivo.
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