<b>Structural characteristics of <em>Brachiaria decumbens</em> pastures deferred for 140 days and nitrogen fertilization strategies</b> - doi: 10.4025/actascianimsci.v33i4.10212

Abstract

The objective of this study was to evaluate the structural characteristics of Brachiaria decumbens pastures deferred for 140 days, in order to determine the most appropriate nitrogenous fertilization. Four fertilization strategies were studied at the beginning and end of summer (0-0, 100-0, 50-50, 0-100 kg ha^-1 N), respectively, with four replications. For volumetric density evaluation, forage was harvested in three strata: stratum A- over 40 cm above the soil; B- 20-40 cm; and C- 0-20 cm above the soil. The falling index was lower (p < 0.05) for the fertilization strategy using 100 kg ha ^-1 N applied at the end of summer. In stratum B (between 20 and 40 cm above the soil), greater (p < 0.05) densities were observed for total forage, leaf blade and green stem using the fertilization strategy of 100 kg ha^-1 N applied in early summer (100-0). Greater stem lengths (p < 0.05) were observed in pastures with fertilization strategy 0-100, followed by the 50-50 strategy. The strategies of applying 100 kg ha^-1 at the end of summer, followed by the strategy of 50 kg ha^-1 nitrogen partitioned in the beginning and end of summer, have a positive influence on the structural characteristics in pastures deferred for 140 days.