Influência de prática conservacionista do solo sobre o escoamento e a produção de sedimentos.

Abstract

Soil erosion is considered a worldwide environmental problem and is observed in both agricultural and forested soils. The objective of this work was to evaluate the influence of the insertion of conservation practice on soil attributes, runoff generation and sediment yield. The research was carried out in plots of 100 m², located at the São João do Cariri Experimental Basin, PB, kept in fallow regime, with insertion of conservation practice in the plot 2 (P2), composed of three stages: planting of seedlings native species of Caatinga, seed bank recomposition and the use of manure mulch. The variables analyzed were organic matter content, density, infiltration rate, runoff and sediment yield. There was a 105% increase in organic matter content, a 23% reduction in density, runoff and sediment yield up to 100%, in plot 2. The use of the combined conservation practice reduced the regeneration land cover time from 36 to 3 months, recovered soil attributes, controlled the erosion by water, allowed the establishment of the plant species, even in the dry season.