Soursop production under supplementary irrigation and mulching in the semiarid region of Brazil/Producao de gravioleira sob irrigacao suplementar e mulching na regiao semiarida do Brasil.

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Publisher: ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior
Document Type: Article
Length: 3,953 words

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Abstract :

HIGHLIGHTS: Water supplementation in the dry season increases the yield of soursop. Irrigation and mulching increase soursop yield in semiarid regions. The mulch with Agave sisalana residue was more efficient in increasing the yield of soursop. Irregular rainfall in the semiarid region of Brazil and in the world exerts a limiting action on agricultural production, in general, including fruit species. Under these conditions, irrigation is the input that keeps the production system both economically and socially viable. This study was carried out from 2012 to 2014, in the municipality of Remigio, Paraiba State, Brazil, aiming at evaluating the production of 'Morada' soursop cultivated under rainfed and irrigated conditions, in soil with and without mulch, in two harvests. The treatments were distributed in randomized block design with three replicates in a 2 * 3 * 2 factorial scheme, corresponding to non-irrigated plants (0 mm water depth) and plants irrigated weekly (17.2 mm water depth) in soil without mulching, with cover crop residues, and with a sisal bagasse mulch in the 2012/2013 and 2013/2014 crop years. In the soil without mulching, irrigation increased yield from 5.3 to 34.71 [ha.sup.-1] in the first harvest and from 9.4 to 57.71 [ha.sup.-1] in the second harvest. The association between irrigation and mulch with sisal residue promoted the highest yield. The use of mulch of sisal residue increased the number and mean mass of fruits, production per plant and yield of 'Morada' soursop compared to the soil without mulch and covered by crop residues. Keywords: Annona muricata L., Agave sisalana residue, water-use efficiency yield A irregularidade das chuvas na regiao semiarida do Brasil e do mundo exerce acao limitante na producao agricola, em geraf inclusive das especies frutiferas. Nessas condicoes, a irrigacao e o insumo que mantem o sistema produtivo com viabilidade economica e social. O estudo foi desenvolvido no periodo de 2012 a 2014, no municipio de Remigio, Estado da Paraiba, Brasil, com o objetivo de avaliar a producao de gravioleira 'Morada' cultivada em condicoes de sequeiro e irrigada, no solo sem e com cobertura morta em duas safras. Os tratamentos foram distribuidos em blocos casualizados com tres repeticoes, em arranjo fatorial 2 * 3 * 2, relativos as plantas nao irrigadas (lamina de 0 mm) e irrigadas semanalmente (lamina de 17,2 mm) no solo sem cobertura, com cobertura a partir de restos de culturas e com bagaco de sisal nas safras agricolas de 2012/2013 e 2013/2014. No solo sem cobertura a irrigacao elevou a produtividade de 5,3 para 34,7 t [ha.sup.-1] na primeira safra e de 9,4 para 57,7 t [ha.sup.-1] na segunda safra. O uso conjunto da irrigacao e a cobertura com residuo de sisal proporcionou as maiores produtividades. O uso do residuo de sisal como cobertura morta aumentou o numero e a massa media de frutos, a producao por planta e a produtividade da gravioleira 'Morada' em relacao ao solo sem cobertura e coberto por residuos culturais. Palavras-chave: Annona muricata L., Agave sisalana residuo, eficiencia de uso da agua, produtividade

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Gale Document Number: GALE|A662090026