生态学报2009，Vol.29Issue(7)：3782-3789,8.
橡胶人工林养分循环通量及特征
Feature and flux of nutrient cycling in rubber plantation
摘要
Abstract
Rubber plantations are one of the most successful types of artificial forests. The flux and characteristic parameters of 3 cycling nutrient elements (N, P, K) were studied in a rubber (Hevea brasiliensis) plantation of Clone PR107 at different ages. The results show that: (1) The flux of nutrients were found to increase with the age of the growth, which ranged as N>K>P. The total nutrient absorption, retention, return and nutrient of rubber latex in rubber plantation ecosystem were estimated to be 315.28-949.13kg · hm-2 · a-1, 282.78-714.51kg · hm-2 · a-1, 32.50-205.74kg · hm-2 · a-1 and 10.18-37.73kg · hm-2 · a-1. The nutrient input and output in soil ranged from 111.73kg.hm-2.a-1 to 652.79kg · hm-2 · a-1, and 315.28kg · hm-2 · a-1 to 949.13kg · hm-2 · a-1,and the loss of nutrient in soil was just -249.94 kg · hm-2 · a-1;(2) Characteristic parameters of nutrient cycling changed with increasing age. Both absorption and return coefficients increased, retention coefficient decreased, and soil and litter nutrient equilibrium index declined as well after 6 years. The litter decomposition limited the rate of nutrient cycling, which resulted in nutrient imbalance in the soil. Nutrient utilizing efficiency was reduced after the first growth up to 14 years;(3) There were differences of the characteristic parameter of nutrient cycling for each element. Absorption and return coefficient both ranked in the following order: N>P>K, retention coefficient and nutrient utilizing efficiency followed the sequence K>P>N and P>K>N, but the soil and litter equilibrium index stood in the order of P>N>K and K>N>P. It′s also indicated that the liquidity of elements were the largest in N, second in K, and least in P, and so were the cycling rate and level.关键词
橡胶人工林/养分循环/通量/特征Key words
rubber plantation/nutrient cycling/flux/feature分类
农业科技引用本文复制引用
赵春梅,蒋菊生,曹建华,熊代群,谢贵水,李晓波..橡胶人工林养分循环通量及特征[J].生态学报,2009,29(7):3782-3789,8.基金项目
国家农业部科研所基本业务费资助项目(ywf2007) （ywf2007）
海南省自然科学基金资助项目(070835) （070835）
