SOIL PHYSICAL PROPERTIES UNDER SILVOPASTORAL SYSTEM WITH DIVERSITY TREE NUCLEI IN SANTA CATARINA STATE

Abstract

Conservation farming systems, such as the silvopastoral system and Management intensive grazing (MIG), have been presented as efficient solutions to raise the quality of the physical attributes of poorly managed soils, as well as to leverage local biodiversity and agricultural productivity. Based on this, this work evaluated the effects of silvopastoral system tree nuclei with four-year-old (SPSnuclei) under the physical attributes of the soil, comparing with MIG areas without trees, primary forest (F1) and secondary forest (F2). The following soil quality indicators were evaluated: soil density (SD) and aggregation indices: geometric mean diameter (GMD) and sensitivity index – SIGMD). The results showed that the SPSnuclei and MIG systems presented higher values of SD than F1, but these values are lower than the critical value for root development. In addition, the results evidenced the potential of SPSnuclei and MIG treatments to promote the physical structuring of the soil, presenting values of GMG and SIGMD higher than F1, which represents the original condition of the soil. Thus, it was possible to infer that agroecological management (MIG and SSPnuclei) promote the process of soil aggregation more efficiently compared to forest areas, especially secondary forest, evidencing its ability to restore the physical structure of the soil.

Keywords

• agregação do solo
• estrutura física do solo
• teoria da nucleação
• agricultura biodiversa