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。
Smaller management density was beneficial to increase DBH growth rate of Chinese pine forest.
较小的经营密度有利于提高人工油松林胸径生长速率。
Smaller management density was beneficial to increase DBH growth rate of Chinese pine forest.
较小的经营密度有利于提高人工油松林胸径生长速率。
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