科研之友
微信
新浪微博
Facebook
分享链接
摘要
we investigated the leaf nutrient content of trees species from three distinct successional stages (early, intermediate, late) of a lowland rain forest located near the coast of paran芍 state, brazil. this forest grows on sandy soil with low nutrient content. we collected mature leaves from five different individuals of each sucessional stages of the most important tree species of each successional stage (four of the early; eight of the intermediate and 11 of the late stages) for chemical analysis of following elements: n, p, k, ca, mg, c, zn, fe, cu e mn. the species from early sucessional stage have lower contents of n, p, k, zn, fe, and higher contents of mg. these concentrations are statistically different (p 25:1), despite of the tendency to decrease as succession advances. the increment of concentration of the most studied foliar nutrients along the successional gradient is probably related to the accumulation of litter above the soil that provides a more adequate environment for efficient nutrient cycling and higher nutrient concentration in the soil.
