间伐强度对塞罕坝华北落叶松人工林生长进程和生物量的影响  

Effects of Thinning Intensity on the Growth and Biomass of Larix principis-rupprechtii Plantation in Saihanba,Hebei Province

作　　者：贾忠奎[1] 公宁宁[1] 姚凯 司瑞雪 程顺 王立东 刘杰[1] 王西洋[1] 游伟斌[1] 张田田[1] 

机构地区：[1]省部共建森林培育与保护重点实验室(北京林业大学),北京100083 [2]河北省塞罕坝机械林场

出　　处：《东北林业大学学报》2012年第3期5-7,31,共4页Journal of Northeast Forestry University

基　　金：中央高校基本科研业务费专项资金(BLJD200904);北京林业大学科技创新计划项目(TD2011-08);林业公益性行业科研专项经费项目(201004021);林业科技推广项目(2011-44)

摘　　要：根据塞罕坝机械林场总场阴河林场生产经营现有的间伐强度(24.0%、25.9%、38.6%),设置标准地9块并制作解析木9株,对不同间伐强度条件下的华北落叶松(Larix principis-rupprechtii Mayr.)人工林生长状况、生物量及生产力进行了调查研究。结果表明:随着间伐强度的增加,胸径、树高、材积生长量均有明显增加;相同龄组不同间伐强度条件下,林木树干、树皮、树枝、树叶、树根生物量及总生物量有随间伐强度增大而增加的趋势。间伐强度为38.6%的林分树干的含碳量为48.20 t.hm-2,比间伐强度24.0%、25.9%的林分分别大2.81、1.08 t.hm-2,林木碳储量的积累主要在树干部分,大约占总碳储量的50%左右。从生产实际来说间伐强度为38.6%条件下林分平均生产力比24.0%、25.9%间伐林分分别高出4%、5%。针对林场生产经营现有的3种间伐措施来讲,最适间伐强度为38.6%。Nine sample plots were set up in Larix principis-rupprechtii plantations in Saihanba State-owned Forest Farm based on the existing thinning intensities（24.0%,25.9% and 38.6%）.One analytic tree was selected in each sample plot（3 repeated trials for every thinning intensity） to study the effects of various thinning intensities on the growth,biomass and productivity of L.principis-rupprechtii plantations.Results showed that diameter at breast height,tree height and wood volume were positively affected by the increase of thinning intensity.Biomasses of tree trunks,bark,branches,leaves,roots and the total biomass of L.principis-rupprechtii plantations in the same age group showed an increasing trend with increasing thinning intensity.The carbon content in trunks was highest（48.20 t·hm-2） under thinning intensity of 38.6%,which was 2.81 and 1.08 t·hm-2 higher than that of the other two thinning intensity treatments（24.0%,25.9%）,respectively.Forest carbon storage was mainly accumulated in the trunks（50% of the total carbon storage）.Similarly,plantation productivity was highest（5.2 t·hm-2·a-1） under the thinning intensity of 38.6%,which was 4% and 5% higher than that of the other two treatments,respectively.For the existing thinning measures,the optimal thinning intensity was 38.6%.

关 键 词：间伐 华北落叶松人工林 生物量 生产力 

分 类 号：S753.71[农业科学—森林经理学] S719.22[农业科学—林学]