加强土壤和地被物管理对杉木生态系统生物量能量利用与养分循环的影响  

EFFECTS OF STRENGTHONING SOIL AND COVER PLANTS MANAGEMENT ON ENERGY UTILIZATION AND NUTRIENT CYCLE OF ECOSYSTEM BIOMASS IN CUNNINGHAMIA LANCEOLATA

作　　者：方奇[1] 

机构地区：[1]中国林业科学研究院林业研究所

出　　处：《林业科学》1990年第3期201-208,共8页Scientia Silvae Sinicae

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.

关 键 词：土壤 地被物 杉木 生物量 养分循环 

分 类 号：S791.270.2[农业科学—林木遗传育种]