内蒙古草原华北落叶松人工林生态特性研究

Studies on the ecological characteristics of Larix principis-rupprechtii plantations in the steppe of Inner Mongolia

对内蒙古半干旱草原白音敖包林场华北落叶松人工林生态特性的研究结果表明,华北落叶松在内蒙古地区最适生于阴坡,适度抚育间伐可促进华北落叶松的生长;且其间伐开始期应为12～13年,尤其是幼龄林时进行弱度间伐(株树间伐强度为20%左右)效果最明显.华北落叶松与白桦或沙地云杉混交可促进华北落叶松生长,提高其景观价值.

The ecological characteristics of Larix principis-rupprechtii plantations in the semi-arid steppe were studied.The results show that the shady slope is the most suitable site type for Larix principis-rupprechtii in Inner Mongolia.An appropriate thinning of the trees can promote the growth of the plantations and the beginning period of thinning should be 12～13 years old of the trees.Particularly the effect of weak thinning is obvious in younger stands.The mixed stands of Larix principis-rupprechtii and Betula platyphylla or Picea mongolica will accelerate the growth of the stands and promote the landscape value.