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vol.30 número2DIVERGÊNCIA GENÉTICA EM GENÓTIPOS DE ALGODÃO EM CONDIÇÕES DE SAFRA E SAFRINHAFAUNA EDÁFICA COMO BIOINDICADORA DA RECUPERAÇÃO DE ÁREAS DEGRADADAS NO BIOMA CAATINGA índice de autoresíndice de assuntospesquisa de artigos
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Revista Caatinga

versão impressa ISSN 0100-316Xversão On-line ISSN 1983-2125

Resumo

SOUZA, ÊNIO GOMES FLÔR et al. PRODUCTION OF LETTUCE UNDER GREEN MANURING WITH Calotropis procera IN TWO CULTIVATION SEASONS. Rev. Caatinga [online]. 2017, vol.30, n.2, pp.391-400. ISSN 0100-316X.  https://doi.org/10.1590/1983-21252017v30n214rc.

The production of vegetable crops is characterized by intensive land use, high input demands and the requirement of strategic management adoption with an agro-ecological approach. In this study, agronomic indicators were evaluated in lettuce fertilized with different amounts of roostertree biomass; fertilizer was incorporated into the soil at distinct times and seedlings were planted in two cropping seasons (spring and autumn-winter) in Serra Talhada, Pernambuco state, Brazil. The experimental design consisted of randomized complete blocks with three replications and treatments arranged in a 4 x 4 factorial scheme. The first factor was the amounts of roostertree biomass (5.4, 8.8, 12.2, and 15.6 t ha -1 on a dry basis) and the second the manure incorporation times (0, 10, 20, and 30 days before lettuce transplanting). The variables evaluated in the lettuce crop were: plant height and diameter, number of leaves per plant, productivity of green mass, and dry shoot mass. Maximum productivity and dry shoot mass were obtained using fertilization with 15.6 t ha -1. A synchrony between supply of nutrients by green manure and the period of maximum demand by lettuce was observed in the incorporation times of 10 (spring) and 20 (autumn-winter) days before transplanting. Cultivation in the spring resulted in higher vegetative growth.

Palavras-chave : Lactuca sativa L.; Roostertree; Organic cropping..

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