论文部分内容阅读
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 the experimental area, the runoff coefficient and solid taffinity were 0.074% and 0.902 t / ha · a, respectively, and the nutrient input was 69.941 kg / ha · a by precipitation. The nutrients (29.143 kg / ha · a) Net increase of nutrients accounted for 58.33% of the input. Soil organic matter loss 24.02kg / ha · a, at the same time the Chinese fir ecosystem returned organic matter 985.35kg / ha · a, net increase of organic matter about 41 times the amount of loss. The experimental area of light energy utilization average of 4.64%. The biomass and nutrient accumulation of 5-year-old Chinese fir ecosystem reached 51.6t / ha and 1078.704kg / ha, respectively.