Decomposition of ground biomass of secondary forest and yield of annual crops in no tillage system

Resumen

The objective of this work was to evaluate the dynamics of decomposition process of chopped secondary forest
system, previously enriched with legumes Inga velutina Willd. and Stryphnodendron pulcherrimum (Willd.) Hochr.
and the contribution of this process to the nutrient input to the cultivation of corn and bean under no-tillage. The
experimental design was a randomized block, split plot with four replications. The plots were two species (I. velutina
and S. pulcherrimum) and the subplots were seven times of evaluation (0, 7, 28, 63, 189, 252, 294 days after
experiment installation). There was no difference (p > 0.05) between the secondary forest systems enriched and no
interaction with times for biomass waste, decomposition constant and half-life time. The waste of S. pulcherrimum
trees had higher (p < 0.05) C/N ratio than that I. velutina. However, this one was higher (p < 0.05) in lignin content.
Nevertheless, the dynamics of residue decomposition was similar. The corn yield was higher (p < 0.05) in cultivation
under I. velutina waste. Meanwhile, the beans planted after corn, shows similar (p > 0.05) yield in both areas,
regardless of the waste origin.