摘要
试验区迳流系数和固体迳流为0.074％与0.902t/ha·a,降水输入养分69.941kg/ha·a,同期迳流(包括固体迳流)输出养分29.143kg/ha·a,生态系统净增养分占输入量的58.33％。土壤有机质流失24.02kg/ha·a,与此同时杉木生态系统归还有机质985.35kg/ha·a,净增有机质约为流失量的41倍。试验区光能利用率平均为4.64％。5年生杉木生态系统生物量和养分积累,分别达到51.6t/ha与1078.704kg/ha。
In experimental region, the runoff coefficient and soild runoff are only 0.074％ and 0.902t/ha·a. The total amount of input nutrient from precipitation is 69.941 kg/ha·a, meanwhile the runoff output including soild runoff amounted to 29.143kg/ha·a, consequently the net increment in nutrient in this ecosystem made up 58.33％ of the total input nutrient. In a certain period, the organic matter returned to the ecosystem is 985.35k/g ha·a, the loss of it from soil is 24.02kg/ha·a, thus the net increase of it will be about 41 times as much as the loss. The average utilization efficiency of radiant energy will be 4.64％. In a 5-year-old Cunninghamia lanceolata ecosystem, biomass and nutrient accumulation will amount to 51.6t/ha and 1078.704kg/ha respectively.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1990年第3期201-208,共8页
Scientia Silvae Sinicae
