Growth and production of castor bean BRS Paraguacu under irrigation, soil mulching and organic fertilization/Crescimento e producao da mamoneira BRS Paraguacu sob irrigacao, cobertura do solo e adubacao organica

• Published in: Revista brasileira de engenharia agrícola e ambiental p. 857
• Main Authors: Ferreira, Nubia M, de Mesquita, Evandro F, V. da S. Sa, Francisco, Be, de Paiva, Emanoela P, Farias, Soahd A.R
• Format: Journal Article
• Language: Spanish
• Published: ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior 01.09.2015
• Subjects: Brasil
• ISSN: 1415-4366
• DOI: 10.1590/1807-1929/agriambi.v19n9p857-864

The objective of this study was to evaluate the growth and production of castor bean BRS188 Paraguacu, which has been recommended for the Northeast of Brazil in relation to organic fertilization, mulching and levels of water replacement. For this, an experiment was conducted under field conditions in the municipality of Catole of Rocha-PB, using a randomized complete block design with factorial 2 x 2 x 4, consisting of two levels of replacement of water through irrigation due to the crop evapotranspiration--ETc 100 and 50%, with and without mulch (Cenchrus ciliares L) and four levels of bovine biofertilizer (0, 1.2, 2.4 and 3.6 L [plant.sup.-1]), applied to the soil, totaling 16 treatments with three replications and ten plants per treatment totaling 48 experimental plots. Plants irrigated with 50% of ETc, under mulch and bovine fertilizer at a dose of 3.6 L [plant.sup.-1] reached leaf area and similar productions to plants grown in conventional system without mulch cover and irrigated with 100% ETc. Key words: Ricinus communis L. cropping system water management Objetivou-se, neste trabalho, avaliar o crescimento e producao da mamona cv. BRS-188 Paraguacu que tem sido recomendada para a regiao Nordeste do Brasil em relacao a adubacao organica, cobertura morta e niveis de reposicao de agua. Para isto foi desenvolvido o experimento em condicoes de campo, na cidade de Catole do Rocha, PB, usando-se um delineamento experimental em blocos casualizados com fatorial 2 x 2 x 4, constituido de dois niveis de reposicao de agua em funcao da evapotranspiracao da cultura--ETc de 100 e 50% no solo sem e com cobertura morta (Cenchrus ciliares L) e quatro niveis de biofertilizante bovino (0; 1,2; 2,4 e 3,6 L [planta.sup.-1]), aplicados ao solo totalizando 16 tratamentos com tres repeticoes e dez plantas por tratamento totalizando 48 parcelas experimentais. As plantas irrigadas com 50% da ETc, no solo com cobertura morta e biofertilizante bovino na dose de 3,6 L [planta.sup.-1] atingiram areas foliares e producoes semelhantes as plantas cultivadas em sistema convencional sem cobertura e irrigadas com 100% da ETc. Palavras-chave: Ricinus communis L. sistema de cultivo manejo de agua