Based on analysis of main climatic factors in Yuanmou dry-hot valley,soil physical and chemical properties,growth conditions,natural regenernation,species diversity among plantations. Then evaluate stability of the plantations synthetically and quantificationally,get the most stability plantation model.
本研究通过分析元谋干热河谷地区主要气象因子变化、各类型人工林土壤理化性质、林分生长状况、天然更新状况、林下植物多样性，定量评价各人工林稳定程度，得出最稳定的人工林模式，并针对该地区人工林的现状提出生态系统管理对策。
参考来源 - 元谋干热河谷地区人工林稳定性及人工生态系统管理的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Besides, the two systems were significantly different in soil nutrient content and soil physical and chemical properties.
而且两者耕层土壤的养分含量和理化性质等指标也有明显差异。
The main conclusions can be drawn as follows: (1) Intercropping could obviously improve soil physical and chemical properties.
主要结论如下：(1)林粮间作能较好地改善土壤物理和化学性质。
The effects of soil-handling operations for coal mining subsidence on soil physical and chemical properties were investigated in this paper.
研究了采煤塌陷区适农土地表土剥离复垦和混推复垦对复垦后土壤理化性质的影响。
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