大兴安岭采伐迹地主要目的树种的天然更新  

Natural Regeneration of Main Tree Species in Deforested Lands in Daxing’an Mountains

作　　者：徐鹤忠[1] 董和利[1] 底国旗[1] 刘滨辉[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2006年第1期18-21,共4页Journal of Northeast Forestry University

摘　　要：对不同采伐方式(经营择伐、二次渐伐和皆伐)、林分组成、坡向、坡位、郁闭度、土壤厚度、下木盖度、地被物盖度等条件下样地中主要目的树种的更新情况进行了调查。结果表明:经营择伐林分有效天然更新株数最多,温度和光照条件是决定兴安落叶松更新的重要条件;经营择伐林分兴安落叶松天然更新株数主要受林分郁闭度的制约,皆伐和二次渐伐林分兴安落叶松天然更新株数主要受地表草本植物的制约;二次渐伐林分不同坡位间不但更新数量存在差异,而且树木的生长状况差异也很大。An experiment was conducted to investigate the natural regeneration of main tree species in deforested lands in Daxing＇ an Mountains under different cutting methods, stand composition, slope aspects, slope position, canopy densities, soil stratification thickness, herb coverage and grass covers. Result showed that the natural regeneration in selective cutting forestlands is the best among three cutting methods （ selective cutting, clear cutting and successive cutting）. Temperature and solar condition play an important role in the natural regeneration of main tree species. Canopy density is the main factor to restrict the natural regeneration in selective cutting forestlands, while in clear cutting and successive cutting forestlands, herb coverage is the main restrictive factor. The differences in both natural effective regeneration amount and natural regeneration seedlings growth were found between different site conditions of successive cutting forestlands.

关 键 词：采伐方式 主要树种 天然更新 

分 类 号：S754.1[农业科学—森林经理学]