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Nutritional status of cotton plants under fertigation with reuse water and phosphate fertilization

ABSTRACT Water reuse is an important practice in water resource management especially in arid and semi-arid areas. The objective was to evaluate the mineral composition and boll weight of upland cotton (cultivar BRS 335) plants under fertigation with domestic sewage effluent and phosphate fertilizat...

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Published in:Revista brasileira de engenharia agrícola e ambiental 2020-09, Vol.24 (9), p.603-609
Main Authors: Gonçalo Filho, Francisco, Ferreira Neto, Miguel, Dias, Nildo da S., Medeiros, José F. de, Fernandes, Cleyton dos S., Sá, Francisco V. da S.
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creator Gonçalo Filho, Francisco
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description ABSTRACT Water reuse is an important practice in water resource management especially in arid and semi-arid areas. The objective was to evaluate the mineral composition and boll weight of upland cotton (cultivar BRS 335) plants under fertigation with domestic sewage effluent and phosphate fertilization. An experiment was carried out using randomized block design in a 3 × 2 factorial scheme with six repetitions. Cotton plants were fertigated with three fertigation solutions containing domestic sewage effluent (RW) and supply water (SW) in the proportions of 100% SW - T1, 50% SW + 50% RW - T2 and 100% RW - T3, and two phosphate fertilizer managements (with and without phosphate fertilization at pre-planting). Macronutrient and micronutrient concentrations in the shoots and boll weight were measured and evaluated. Fertigation utilizing reuse water is able to supply both water and part of the nutritional demand of cotton plants. Calcium, copper, iron and zinc concentrations in cotton leaves were below the optimum range for the crop. Reuse water did not meet the total requirements of Ca, Cu, Fe and Zn of cotton, so complementary mineral supplementation with these nutrients is recommended for the crop to obtain high yield. RESUMO O reuso de água é uma prática importante no gerenciamento dos recursos hídricos, especialmente nas zonas áridas e semiáridas. Com isso, objetivou-se avaliar o estado nutricional e a massa do capulho do algodoeiro herbáceo (cultivar BRS 335) quando fertigado com efluente de esgoto doméstico e adubação fosfatada. Um experimento foi conduzido em delineamento de blocos ao acaso, em esquema fatorial 3 × 2, com seis repetições. As plantas de algodão foram fertigadas com três soluções contendo efluente de esgoto doméstico (AR) e água de abastecimento (AA) nas proporções de 100% de AA - T1, 50% AA + 50% AR - T2 e 100% AR - T3 e, dois manejos da adubação fosfatada (com adubação e sem adubação fosfatada em pré-plantio). Foram avaliados os teores de macronutrientes e micronutrientes nas folhas e a massa de capulho. A fertigação com água de reuso é viável para suprir a demanda hídrica e parte da demanda nutricional do algodoeiro. A água de reuso não atendeu aos requisitos totais de Ca, Cu, Fe e Zn do algodão, portanto, recomenda-se a suplementação mineral complementar com esses nutrientes para que a cultura obtenha alto rendimento.
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Reuse water did not meet the total requirements of Ca, Cu, Fe and Zn of cotton, so complementary mineral supplementation with these nutrients is recommended for the crop to obtain high yield. RESUMO O reuso de água é uma prática importante no gerenciamento dos recursos hídricos, especialmente nas zonas áridas e semiáridas. Com isso, objetivou-se avaliar o estado nutricional e a massa do capulho do algodoeiro herbáceo (cultivar BRS 335) quando fertigado com efluente de esgoto doméstico e adubação fosfatada. Um experimento foi conduzido em delineamento de blocos ao acaso, em esquema fatorial 3 × 2, com seis repetições. As plantas de algodão foram fertigadas com três soluções contendo efluente de esgoto doméstico (AR) e água de abastecimento (AA) nas proporções de 100% de AA - T1, 50% AA + 50% AR - T2 e 100% AR - T3 e, dois manejos da adubação fosfatada (com adubação e sem adubação fosfatada em pré-plantio). 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Reuse water did not meet the total requirements of Ca, Cu, Fe and Zn of cotton, so complementary mineral supplementation with these nutrients is recommended for the crop to obtain high yield. RESUMO O reuso de água é uma prática importante no gerenciamento dos recursos hídricos, especialmente nas zonas áridas e semiáridas. Com isso, objetivou-se avaliar o estado nutricional e a massa do capulho do algodoeiro herbáceo (cultivar BRS 335) quando fertigado com efluente de esgoto doméstico e adubação fosfatada. Um experimento foi conduzido em delineamento de blocos ao acaso, em esquema fatorial 3 × 2, com seis repetições. As plantas de algodão foram fertigadas com três soluções contendo efluente de esgoto doméstico (AR) e água de abastecimento (AA) nas proporções de 100% de AA - T1, 50% AA + 50% AR - T2 e 100% AR - T3 e, dois manejos da adubação fosfatada (com adubação e sem adubação fosfatada em pré-plantio). 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Reuse water did not meet the total requirements of Ca, Cu, Fe and Zn of cotton, so complementary mineral supplementation with these nutrients is recommended for the crop to obtain high yield. RESUMO O reuso de água é uma prática importante no gerenciamento dos recursos hídricos, especialmente nas zonas áridas e semiáridas. Com isso, objetivou-se avaliar o estado nutricional e a massa do capulho do algodoeiro herbáceo (cultivar BRS 335) quando fertigado com efluente de esgoto doméstico e adubação fosfatada. Um experimento foi conduzido em delineamento de blocos ao acaso, em esquema fatorial 3 × 2, com seis repetições. As plantas de algodão foram fertigadas com três soluções contendo efluente de esgoto doméstico (AR) e água de abastecimento (AA) nas proporções de 100% de AA - T1, 50% AA + 50% AR - T2 e 100% AR - T3 e, dois manejos da adubação fosfatada (com adubação e sem adubação fosfatada em pré-plantio). 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title Nutritional status of cotton plants under fertigation with reuse water and phosphate fertilization
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