However, The Mongolian pine height, density, DBH and the height and covering degree of grass under forest highly was not remarkable relevance with bird density, respectively.

树的高度、密度、胸径、森林下草的高度， 草的盖度与鸟类密度相关不显著。

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The results indicated that the effect of mixed masson pine and oak forest on soil amelioration was the best, that of grass was the second and the pure masson pine forest was the worst.

结果表明：松栎混交林对土壤的改良效果最好，草地次之，马尾松纯林则较差。

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