Concentração salina e fases de exposição à salinidade do meloeiro cultivado em substrato de fibra de coco Salt concentration and phases of exposure tosalinity of melon grown in coconut fiber substrate
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2011
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Abstract
No semiárido, a escassez de água de boa qualidade faz com que os produtores utilizem água salobra para preparar a solução nutritiva. Com o objetivo de investigar a utilização de água salobra na irrigação de meloeiro (Cucumis melo L., cv. AF 015) cultivado em substrato de fibra de coco em casa de vegetação, plantas foram nutridas com soluções salinas de condutividades elétricas (CEs) 1,1 (testemunha); 2,5; 4,0 e 5,5 dS m-1 aplicadas durante as fases: crescimento vegetativo (10-30 dias após o transplantio-DAT); florescimento (31-50 DAT) e frutificação e maturação (51-70 DAT). O delineamento experimental foi o inteiramente casualizado, com 12 tratamentos arranjados em um esquema fatorial 4x3 (níveis de salinidade x tempo de exposição dos sais), com três repetições. Houve correlação na perda relativa por incremento de CEs das variáveis de crescimento e de produção do meloeiro em função da salinidade da solução nutritiva para cada fase de exposição. As soluções nutritivas preparadas com água salobra podem ser utilizadas no cultivo do meloeiro em substrato de fibra de coco com o mínimo de perdas relativas de massa média de frutos por incremento de CEs, quando aplicadas na fase de florescimento.
Scarcity of good water quality in semiarid region causes producers to use brackish water to prepare the nutrient solution. In order to investigate the use of brackish water in irrigation of greenhouse-melon (Cucumis melo L., cv. AF 015) grown in coconut fiber substrate, plants were irrigated with saltine nutrient solutions of electrical conductivities (ECs) of 1.1 (control), 2.5, 4.0 and 5.5 dS m-1, applied during the phases of vegetative growth (10-30 days after transplanting, DAT), flowering (31-50 DAT) and fruiting and ripening (51-70 DAT). The design was completely randomized, with 12 treatments arranged in a 4x3 factorial design (salinity levels x exposure time of the salts), with three replications. There was a correlation in the reduction relative to each increased de ECs of the growth and yield variables of melon in function of ECs for each phase of exposure. The nutrient solutions prepared with brackish water can be used to grow melons in coconut fiber substrate with minimal reduction relative of mean fruit weight with increasing ECs applied during flowering.
Scarcity of good water quality in semiarid region causes producers to use brackish water to prepare the nutrient solution. In order to investigate the use of brackish water in irrigation of greenhouse-melon (Cucumis melo L., cv. AF 015) grown in coconut fiber substrate, plants were irrigated with saltine nutrient solutions of electrical conductivities (ECs) of 1.1 (control), 2.5, 4.0 and 5.5 dS m-1, applied during the phases of vegetative growth (10-30 days after transplanting, DAT), flowering (31-50 DAT) and fruiting and ripening (51-70 DAT). The design was completely randomized, with 12 treatments arranged in a 4x3 factorial design (salinity levels x exposure time of the salts), with three replications. There was a correlation in the reduction relative to each increased de ECs of the growth and yield variables of melon in function of ECs for each phase of exposure. The nutrient solutions prepared with brackish water can be used to grow melons in coconut fiber substrate with minimal reduction relative of mean fruit weight with increasing ECs applied during flowering.
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| Authors | Dias, Nildo da Silva;Oliveira, André Moreira de;Neto, Osvaldo Nogueira de Sousa;Blanco, Flávio Favaro;Rebolças, Jonatas Rafael Lacerda; |
| Journal | revista brasileira de fruticultura |
| Year | 2011 |
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