Aporte e decomposição de serapilheira em área de caatinga no município de Pombal-PB.

Abstract

The Caatinga biomes is one of the most threatened by irrational exploitation of natural resources, and even if not the largest biome in the area, comparatively, is the least known and studied, despite being one of the largest concentrated population dependent on its products natural, particularly those of vegetable origin. Based on this principle, is that this study aimed to quantify the accumulation of litter on the surface of soil in an area of Caatinga in accordance with the assessment of the rate of decomposition of leaves of three tree species (Ziziphus joazeiro, Pseudobombax marginatum, Commiphora leptophloeos). For the collection of litter, collecting 20 boxes were implanted with dimensions of 1.0 m2. To evaluate the rate of decomposition of biomass, we used the method of decomposition bags, and were placed in each bag and 10g of leaves were collected every 35 days 9 bag of each species. The amount collected was leaf exceeding the quantity of reproductive structure, and this amount was higher than branches and miscellaneous. It was observed that during the 9 months, there was obtained a total of litter of 1490.6 kg ha-1 on the soil surface. Leaf decomposition was relatively slow, and the evaluation time sufficient to decompose the material completely.