Adubação verde em citros: disponibilização de nitrogênio e fósforo para a cultura de citros com uso de nabo forrageiro e ervilhaca

Abstract

The objective of this study was to evaluate the availability of nitrogen(N), phosphorus(P), in the citrus culture (Citrus sinensis (L) Osbeck) of variety Valencia using differents green ground. The treatments consisted in the following combinations: T1Raphanus sativus L. and,T2Vicia sativa L.. The treatments have been collecting in square mater were coumpound for four repetition each other. They were installed in Porto Mauá countyside of Itatiba do Sul, the sowing was made by hand and the chemical analysis were realized in the Laboratory of Chemical and Physic of Soil UFFS- Erechim. The Raphanus sativus L. has been producing moredry matter than Vicia sativa L.,but, the highestconcentration of N was find in Vetch (Vicia sativa L,)while Fodder turnip (Raphanus sativus L.)showed more P(g/m2).With this work it was observed that these green ground are good options to the management of fertilizing to citrus culture, because both were capable to provide nitrogen na phosphorus to the culture.