摘要
本文从营养元素的现存量、营养元素的年增长量及营养元素的年归还量等几方面,对三江平原天然次生柞木林进行了定位研究。结果表明,该地区的柞木林营养元素的现存量为2121.30kg/ha,营养元素的增长量为83.16kg/ha·a,营养元素的归还量为155.37kg/ha·a。初步建立了营养元素生物循环的模式。
Through the quantitative and positioning observation in natural secondary Oak forests in Sanjiang plain, this paper studied the Oak forests from the Standing Crop, annual growth crop and annual return crop of nutrient elements. The authors made the Conchision that in this area, the Standing crop of nutrient elements is 2 121.30 kg/ha, the growth crop of trophic elements is 83.16 kg/ha·a, the return crop of nutrient elements is 155.37kg/ha·a in Oak forest, and got the type of the biological cycle for nutrient elements.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1990年第S3期39-46,共8页
Journal of Northeast Forestry University
基金
国家自然科学基金
关键词
柞木林
生物量
生产力
营养元素
凋落物
循环
Oak forests
Biomass
Productivity
Nutrient element
Litterfall
Cycle
