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Growth of castor bean BRS-149 nordestina fertilized with nitrogen, phosphorus and potassium

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Author(s): Diva Lima de Araujo | Lúcia Helena Garófalo Chaves | Evandro Franklin de Mesquita | Clébia Pereira de França

Journal: Engenharia Ambiental : Pesquisa e Tecnologia
ISSN 1678-2178

Volume: 6;
Issue: 3;
Start page: 685;
Date: 2009;
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Keywords: Ricinus communis L. | Mineral nutrition | Fertilization

ABSTRACT
A trial was carried out in a greenhouse located at the Federal University of Campina Grande, in Campina Grande, Paraiba State, Brazil, with castor bean plants (Ricinus communis L.), cv BRS Nordestina, in order to evaluate the effects of nitrogen, phosphorus and potassium on the growth. A completely randomized design with three replications and 15 treatments originated from a baconian matrix was adopted. Reference doses were 40:90:60 kg ha-1 of N:P2O5:K2O, respectively. Plant height, stem diameter, number and length of leaves were measured at 20, 40, 60, 80, 100, 120 and 140 days after planting (DAP). The unbalanced fertilization affected the development and seed production of castor bean, and the best response of the plants was observed at levels of 200 kg ha-1 de N; 150 kg ha-1 de P2O5 and 150 kg ha-1 de K2O.
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