摘要
生态系统营养元素的生物地球化学循环是生态系统重要功能过程之一。营养元素循环和动态平衡过程直接影响生产力水平,并直接关系到生态系统的连续与稳定。因此。
Based on small catchment experiment, the accumulation, distribution and biological and geochemical cycling of mineral elements in Dahurian larch plantation ecosystem are analyzed. The annual uptake of elements is 203.842kg·ha^(-1), annual return is 60% of the annual uptake (124.334kg·ha^(-1)), and average cyclic coefficient of macroelements including N, P, K, Ca, Mg is 0.607. The nutrient budget indicates that the total input of nine elements from precipitation is 31,928kg·ha^(-1)·yr^(-1), and output in runoff is 19.832kg·ha^(-1)·yr^(-1), and the net accumulation in larch forest ecosystem is 12.104kg·ha^(-1)·yr^(-1), equivalent to 37.9% of the total input. Compared with the geochemical cycling of mineral elements, the biological cycling is characterized by stronger intensity and higher speed.
出处
《生态学杂志》
CAS
CSCD
北大核心
1992年第5期1-6,15,共7页
Chinese Journal of Ecology
关键词
兴安落叶松
人工林生态系
营养元素
Dahurian larch plantation ecosystem, geochemical cycling, biological cycling, nutrient elements.
