间伐对杉木人工林生长的短期影响  

Short-term Effect of Thinning on the Growth of Chinese Fir Plantation

作　　者：张鹏[1] 王新杰[2] 韩金[2] 卢妮妮 

机构地区：[1]北京林业大学实验林场,北京100095 [2]省部共建森林培育与保护教育部重点实验室(北京林业大学)

出　　处：《东北林业大学学报》2016年第2期6-10,14,共6页Journal of Northeast Forestry University

基　　金："十二五"农村领域国家科技计划(2012BAD22B0502);中央高校基本科研业务费专项资金资助(BLJD200907;JD2010-2)

摘　　要：为了研究杉木人工林在不同经营密度下的生长情况,以福建将乐国有林场杉木人工林为研究对象,设计间伐强度为50%、33%、25%、20%以及未间伐5个不同强度的间伐试验,分析在不同间伐强度下胸径生长、树高生长以及蓄积量的变化。结果表明:适度的间伐能够伐除小径阶的林木,直径分布曲线左偏型减弱。间伐强度为20%、25%、33%、50%的林分年平均胸径生长量分别是0.99、1.05、1.25、1.30 cm,比未间伐的生长量0.83 cm都高,且各个间伐强度下林木胸径生长由大到小依次为优势木、中庸木、劣势木;间伐强度为20%、25%、33%、50%强度间伐的林分树高生长量分别是0.94、0.91、0.89、1.01 m,未间伐的生长量为0.92 m,差异均不显著。林分蓄积结构的分析发现,间伐后1 a,林分的蓄积生长率随着间伐强度的增加而增加。With the Chinese fir plantations on Jiangle State-owned Forest Farm in Fujian,we took four different thinning intensity by 50%,33%,25% and 20% management measures and no-thinning to study the growth of DBH,height and volume structure in different thinning intensities. The moderate thinning trees can cut small grade,and the diameter distribution curve of left type weakened. The growth of stand average diameter at breast height with the thinning intensities of 20%,25%,33% and 50% were 0.99,1.05,1.25,and 1.30 cm,respectively,greater than the growth of no thinning of 0. 83 cm,and in the different thinning intensity,DBH growth descending order was the dominant outweigh,medium outweigh and inferior wood. The growth of stand average height after thinning intensity of 20%,25%,33% and 50% were 0.94,0.91,0.89,and 1.01 m,respectively,and the growth of no thinning was 0.92 m,no difference with each other. The stand density had no effect on the growth of tree height. By stand volume structure analysis,after 1-year thinning,the volume growth rate was increased with the increasing thinning intensity.

关 键 词：杉木人工林 间伐强度 林分生长 

分 类 号：S753.5[农业科学—森林经理学]