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Horticultura Brasileira

versão impressa ISSN 0102-0536versão On-line ISSN 1806-9991

Resumo

OLIVEIRA, Ademar Pereira de et al. Snap bean yield in function of K2O levels. Hortic. Bras. [online]. 2007, vol.25, n.1, pp.29-33. ISSN 1806-9991.  http://dx.doi.org/10.1590/S0102-05362007000100007.

Aiming to evaluate the effect of K2O levels on the increase of snap bean yield, an experiment was performed in Paraíba State, Brazil, in a Quartz Psamment soil. The experimental design was of randomized blocks, with six treatments (0; 50; 100; 150; 200 and 250 kg ha-1 of K2O), in four replications. Each plot contained 40 plants spaced 1.0 m x 0.2 m. Pods maximum number/plant (20 pods) and the maximum yield/plant (171 g), were obtained, respectively with 145 and 173 kg ha-1 of K2O, and pods yield reached maximum value around 25,3 t ha-1 at the level of 171 kg ha-1 of K2O. The most economic level of K2O for the production of pods was of 165 kg ha-1. The most economic level represented 96% comparing to that responsible for maximum pods production. The K2O levels that obtained maximum pods production and economic return were correlated, respectively, with 181 and 176 mg dm-3 of K available for the extractor Mehlich 1.

Palavras-chave : Phaseolus vulgaris L; mineral fertilization; yield; economic return; potassium fertilization.

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