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
Their fluctuation degrees were also decreasing as the number of sampling points was increasing. 3) This technique used in Larix plantations was better than Mongolian oak forest.
当抽取样本多于此值后， 曲线下降缓慢。3）落叶松人工林的样地抽样效果要好于柞树林的样地。
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。
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