抚育间伐对冀北山地华北落叶松生长的影响  

Effects of Thinning on Growth of Larix principis-rupprechtii Plantation in Mountainous Area of North Hebei

作　　者：李增利[1] 徐国巧[1] 王雄宾 张冬梅[1] 

机构地区：[1]河北省木兰围场国有林场管理局,河北围场068450 [2]河北省水利科学研究院

出　　处：《山东林业科技》2013年第2期69-71,共3页Journal of Shandong Forestry Science and Technology

摘　　要：合理的抚育间伐能较大提高林分的生产力,作者对河北围场不同间伐保留密度华北落叶松林伐后生长情况进行了分析。结果表明,间伐保留密度为800、700、600、500株/hm2样地的胸径生长量分别为对照的261.28%、395.96%、441.21%、417.45%,其单株材积生长量分别为对照的232.76%、291.46%、344.66%、350.64%。间伐保留600株/hm2样地林分蓄积生长量最大,为72.03m3/hm2,其余依次为700、500、800的70.93、59.78、64.96m3/hm2,对照样地林分蓄积生长量最小,为38.85m3/hm2,800、700、600、500株/hm2样地比对照的生长率分别为168.75%、184.24%、187.10%、155.28%。在抚育间伐后6年,华北落叶松抚育间伐林分在间伐后蓄积量小于未间伐林分,但间伐林分的生长速度大于未间伐林分。Growth status after thinning of Larix principis--rupprechtii plantation in Weicbang, Hebei province was ana- lyzed due to improvement of stand productivity by reasonable thinning. Results showed that DBH increment was increased by 261.28%、395.96%、441.21%、417.45%,and individual stand volume was increased by 232.76%、291.46%、344.66%、350.64%, respectively compared to control when thinning intensity was 800, 700, 600, 500 individuals per hectare. Stand with 600 individuals per hectare had the largest volume increment （72.03 m3/hm2）. Stands with thinning intensity of 700, 500, 800 individuals per hectare had the corresponsive volumes of 70.93, 59.78, 64.96 ms/hm~ , respectively. Samples with thinning intensity of 800, 700, 600, 500 individuals per hectare bad the corresponsive rates of 168.75%、184.24%、187.10%、155.28%, respectively. After 6 years of thinning, Larix principis-rupprechtii plantation had lower volume but higher growth speed than stands without thinning.

关 键 词：间伐 密度 胸径 单株材积 蓄积量 生长量 

分 类 号：S753[农业科学—森林经理学]