Estoque de nutrientes em carnaubais nativos sobre impacto

Abstract

Leaf extraction and the invasion of an exotic plant are two factors that may affect nutrient stock in the ecosystem of carnauba palm (Copernicia prunifera (Mill.) H.E. Moore). However, currently there isn´t any research that quantify the magnitude of these impacts. This work aimed to assess whether the extractive activity and the invasion of Cryptostegia grandiflora Roxb. ex R. Br., modify soil nutrient stocks in the carnauba ecosystem. Thus, the age of 90 plants was estimated. Foliar and soil analyses were performed, inside and outside tree canopy to determine soil stocks and the extraction of nutrients during leaf removal. The results indicate that leaf removal does not reduce the soil nutrient stock as well as the presence of an exotic plant does not increase soil carbon. In this sense, both impacts are not intensive enough to modify soil nutrient stocks, leastwise in the period considered for this study.