生态学的研究显示 ,栎林 (包括蒙古栎林 )在华北地区和东北地区的分布在地质历史时期不是一成不变的 ,其优势度也呈现上下波动 ,栎树优势度的增减是由于地质历史时期气候的变化造成的 ;蒙古栎的起源时间可能不早于上新世中期 ,蒙古栎林的起源也应不早于上新世中期。
The changing range of holding-water rate of litter was 311.49%682.60%, and the order from large to small was Manchurian Ash forest, Mongolian oak forest, Larch plantation,Larch plantation and Scotspine plantatio.
凋落物持水率变化幅度为311.49％～682.60％，大小依次为水曲柳林、蒙古栎林、白桦林、落叶松人工林和樟子松人工林。
参考来源 - 黑龙江东部山地主要林分类型蓄水特征的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
蒙古栎林各月微生物总量大于樟子松林各月微生物总量。
And the monthly total amount microorganism was more in the oak stand than that of in the pine stand.
本研究以北京地区蒙古栎林生态系统为研究对象，对其健康状况进行评价。
This paper analyzed the healthy level of Mongolian oak forest ecosystem in Beijing and tried to find the influencing factors of the forest health ecosystem and proposed the control methods.
本文从群体水平上研究了蒙古栎林生态系统中的水分循环与养分循环的关系。
The relation between water cycling and nutrient cycling was studied from, community level in the oak forest.
应用推荐