以下为句子列表：
英文: Experimental plots were established for thinning effects on stand and tree growth, tree species composition, species diversity and soil factors etc. in the mixed larch-spruce-fir stands which originated from planted larch pure forest by observations for 1
中文: 摘要以15块人工落叶松纯林演化后形成的落叶松云冷杉混交林为对象，间伐后12年观测结果，研究间伐对林分和树木生长、树种组成、物种多样性及土壤等因子的影响。
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