Use of biofertilizer and chemical fertilizer on piatã-grass (Brachiaria brizantha)

Abstract

A study was carried out aimed at evaluating the development of piatã-grass (Brachiaria brizantha) receiving different levels of organic fertilization (0, 1.0, 2.0, 3.0 and 4.0 L of biofertilizers liquid manure) in different conditions of chemical fertilizer (no chemical fertilizer - control, with application of 50 % and 100 % of the chemical fertilizer recommendation). It was observed effect (P <0,05) with or without biofertilizer with chemical fertilizer in all morphogenic and structural characteristics of piatã-grass except the life span of leaves with 100% of chemical fertilizer. It was also observed linear effect (P <0.05) of biofertilizer in leaf elongation rate and leaf senescence in all conditions of chemical fertilizer. With 50% of the chemical recommendation, there was a linear effect (P <0.05) in leaf appearance rate, phyllochron and number of live leaves. The total or partial replacement of chemical fertilizer with biofertilizer may be promising in the development of piatã-grass.