Crescimento inicial do feijão em diferentes densidades e tempos de decomposição da biomassa de triticale

Abstract

The density of biomass on the soil is decisive for the success of no-tillage, since this factor affects practically all the changes that the system promotes. The present work had as objective to follow the initial growth of the beans in different cover densities and periods of decomposition of the Triticale straw in no-tillage system. The experimental design used was in randomized blocks, in a 4x3 factorial scheme, with four replications. In factor A it was allocated as straw density of Triticosecale Wittmack on the soil (0; 12.1; 24.2 and 36.3 t ha-1) and not B the straw decomposition periods (0, 13 and 39 days). The variables analyzed were: emergence, emergence speed index, chlorophyll a and b, plant height, stem diameter, leaf area, dry mass, soil water retention capacity and basal soil respiration. Based on the results obtained, it was possible to overcome the following: At 13 days of straw decomposition, the highest content of chlorophyll a and b was observed in the bean leaves and an increase in the stem diameter of the plants. The presence of triticale phytomass favored the accumulation of dry bean mass at all times and eng.