Contribuição da serapilheira de eucalipto para o sistema de integração lavoura-pecuária-floresta

Abstract

The objective of the study was to evaluate the deposition of litter from Eucalyptus grandis x E. urophylla (clone H13) in the crop-livestock-forest integration system, in Sinop, MT. The deposition was evaluated monthly, for a year, in collectors positioned in the line and interweaving of the planting lines, as well as 3,5m, 7,5m and 15m distance between the tree ranges, considering the south and north face of the systems integration. Litter production was higher in the dry period, mainly in July.The leaf presented the largest stock of nutrients, followed by the branches, bark and reproductive material. In general, the highest stock of nutrients occurred in the homogeneous culture followed by the iLF system, in the decreasing sequence of N> Ca> K> S> Mg> P, and for the micronutrients in the Fe> Mn> Zn> Cu. Considering the exposure faces, to the north presented higher values, already for the position of the collectors, the position 15m presented greater deposition of litter. This demonstrates the importance of studies on nutrient return via litter deposition to maintain the productivity of integration systems.