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作 者 ：田大伦 刘煊章 杨晚华 康文星

期 刊 ：林业科学 1997年 33卷 zk2期 页码：116-123

关键词：第二代杉木林；集水区；养分；生物地球化学；

Keywords:The second-generation of Chinese fir plantation, Watershed, Nutrient, Biogeochemistry,

摘 要 ：本文根据生态定位研究站观测所取得的数据，对第二代7年生杉木林生态系统中生物地球化学循环进行了研究。结果表明，集水区由降水输入的N、P、K、ca、Mg元素总量为58.110kg/hm²·a，径流输出为42.290kg/hm²·a，净积累15.820kg/hm²·a，说明集水区杉木幼林生态系统处于输出为主的生态恢复过程。

Abstract:This study was conducted to reveal the characteristics of biological and biogeologi-cal cycles in a 7-year-old second-generation Chinese fir plantation．The results showed that the total amount of N，P，K，Ca and Mg in precipitation in thd watershed is 58.110kg/hm²·a，while the amount in runoff is 42.290kg/hm²·a,the net accumulation of nutrients is 15.820kg/hm²·a．It indicates that the young Chinese fir forest ecosystem is just in the ecological recovery process．

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