Composto orgânico na produção e qualidade de sementes de brócolis

Abstract

Due to the lack of information about the fertilization effect in vegetable seed yield and quality, mainly in the species that have an increase in cycle due to reproductive stage, it is necessary to evaluate the nutrient level to aid in recommending fertilization that provides best productivity from high physiological potential seeds. Although there are studies about nutrition and recommendation of fertilization to broccoli (Brassica oleracea L. var. italica Plenk), rarely it finds out works that approach the nutrients effects in seed yield and quality. The objective of this work was to evaluate the organic compost influence in broccoli seed quality and yield. The experiment was lead at São Manuel Experimental Farm and the evaluations at Horticulture Sector in Agronomic Science School (FCA/UNESP) in Botucatu. The treatments were four organic compost levels (30, 60, 90 and 120 t ha-1), and control without organic compost. The experimental design was randomized blocks with four replications. The characteristics evaluated were seed yield and number of seed per plant further the characteristics related with seed quality: one thousand seed mass, germination test, first germination counting, index of germination speed and electrical conductivity. The regression showed a linear response in function of organic compost levels, where larger levels resulted higher yield despite the seed quality is not affected.