期刊论文

中文

生态学报

1000-0933

2003

23

7

1369-1376

10.3321/j.issn:1000-0933.2003.07.015

国家重点野外台站资助项目 （ 2 0 0 0 -0 76）； 国家林业局重点科研资助项目 （ 2 0 0 1 -0 7）； 湖南省教育厅资助项目（ 0 1 C0 5 3 ）~~；

本校为第一机构

根据5a定位观测的数据,对湖南会同24～28a生的杉木人工林生态系统各水文学过程中的养分特性进行了研究.结果表明:林冠降水是杉木人工林生态系统养分输入的重要来源,其中Ca的养分含量最高,P的含量最低.林内穿透水各养分元素的含量明显高于林冠降水中养分的含量.除Ca外,树干茎流中其它养分元素的含量为林冠降水的6倍以上.可见,林内穿透水和树干茎流是杉木林生态系统内养分循环的重要组成部分,有利于提高系统的养分利用率.地表径流中除硝态氮外,各元素的含量与穿透水的含量接近,其中P、Na和K 三种元素的含量较低,但未超过林冠降水中养分元素含量.地下径流中N和K的含量较低,而Ca的含量与林冠降水相比...

Based on the data collected over 5 years from January of 1990 to December of 1994 at Huitong Located Research Station of Forest Ecology, the nutrient characteristics of hydroloigcal processes in a Chinese fir plantation ecosystem of 24～28 years old were investigated. The results showed that precipitation was a main source of nutrient input in Chinese fir plantation. The concentration of Ca was the highest and that of P was the lowest in precipitation. The nutrients concentrations in throughfall were conspicuously higher than those in precipita...