摘要
为了研究短期间伐对华北落叶松人工林林分生长和生产力的影响,设置不同保留密度(450、600、750、900株/hm2)的间伐样地以及相应的对照样地,对间伐前后林分的树高、胸径、单株材积、蓄积量、生物量和生产力进行测量与计算。结果表明:不同保留密度下,各间伐样地胸径、树高和单株材积的生长量均大于对照样地;由于保留密度的减小,各间伐样地蓄积量和生物量小于对照样地,各间伐样地生产力均小于对照样地(7 969 kg/(hm2.a));但是其生长率大于对照样地。抚育间伐改变了林分的空间结构和生长环境,明显促进了林木的生长,增加了林地的经济效益。
In order to study the effect of short-term thinning on the growth and productivity of Larix principis-rupprechtii plantation,thinning plots with different reserve densities（450,600,750,900 strains/hm2） and the corresponding control plots were set.Tree height,diameter,individual volume,stand volume,biomass and productivity before and after thinning were measured and calculated.The results show that： with different reserve density,growth of diameter,tree height and individual volume in thinned plots was larger than that in control plots;with decreased reserve density,the stand volume and biomass in thinned plots were less than that in control plots;the productivity of thinned plots decreased by 7 969 kg/（hm2·a）compared with control,but its growth rate was greater than the control plots.Thinning changed the spatial structure and growth conditions of stand,promoted growth of trees significantly,and increased the economic benefit of forest.
出处
《中国水土保持科学》
CSCD
2012年第5期90-93,共4页
Science of Soil and Water Conservation
基金
林业公益性行业科研专项"中国森林净生产力多尺度长期观测与评价研究"(200804006/rhh-09)
关键词
华北落叶松
人工林
间伐
生产力
Larix principis-rupprechtii
plantation
thinning
productivity
