论文部分内容阅读
自1989年至1992年对江西省九连山自然保护区的天然常绿阔叶林通过凋落物归还到枯枝落叶层的养分量进行了测定。凋落物的干重约为6.4t/hm~2·a～8.8t/hm~2·a,其中叶凋落物约为4.3t/hm~2·a～4.7t/hm~2·a。养分归还量氮、磷、钾、钠、钙和镁各为68kg/hm~2·a～85kg/hm~2·a,3.1kg/hm~2·a～3.8kg/hm~2·a,21kg/hm~2·a～67kg/hm~2·a,4.4kg/hm~2·a～6.8kg/hm~2·a,113kg/hm~2·a～160kg/hm~2·a 和19kg/hm~2·a～28kg/hm~2·a。氮和磷的归还量小于而钙的归还量大于热带雨林。
From 1989 to 1992, the nutrient content of natural evergreen broad-leaved forest returned to litter by litter was measured in Jiulianshan Nature Reserve in Jiangxi Province. The dry weight of litter is about 6.4t / hm ~ 2 · a ~ 8.8t / hm ~ 2 · a, and the leaf litter is about 4.3t / hm ~ 2 · a ~ 4.7t / hm ~ 2 · a. Nutrients return of 68kg / hm 2 · a ~ 85kg / hm 2 · a, 3.1kg / hm 2 · a -3.8kg / hm 2 · a for nitrogen, phosphorus, potassium, 21kg / hm ~ 2 · a ~ 67kg / hm ~ 2 · a, 4.4kg / hm ~ 2 · a ~ 6.8kg / hm ~ 2 · a, 113kg / hm ~ 2 · a ~ 160kg / hm ~ 2 · a and 19kg / hm ~ 2 · a ~ 28kg / hm ~ 2 · a. The return of nitrogen and phosphorus is less than the return of calcium than the rainforest.