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。
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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