不同割灌方式对华北落叶松中龄林胸径生长的影响  

Effects of Different Swamping Methods on DBH Growth of Larix principis-rupprechtii Half-mature Forest

作　　者：黄永辉[1] 刘帅[1] Huang Yonghui;Liu Shuai(Mulan Weichang State-owned Forest Farm Administration,Hebei Province,Chengde 068450,China)

机构地区：[1]河北省木兰围场国有林场管理局

出　　处：《防护林科技》2019年第5期63-64,共2页Protection Forest Science and Technology

基　　金：河北省林业科学技术研究项目:木兰林区流域经营关键技术研究(1305448)

摘　　要：通过在河北省木兰林管局北沟林区布设样地,对华北落叶松中龄林实施不同强度的割灌作业,5年后对布设的样地进行了胸径生长量的对比分析,结果表明:胸径生长量依次为第二组样地(以树根为圆心0.5m为半径进行割灌)>第一组样地(不进行割灌作业)>第三组样地(以树根为圆心1m为半径进行割灌)>第四组(全面割灌);割灌对落叶松中龄林胸径生长影响不是很大,低强度小面积割灌最有助落叶松中龄林的径生长,全面割灌最不利于落叶松的胸径生长。By setting up plots in the Beigou Forest Area of Mulan Management Bureau of Hebei Province, different intensity cutting operations were conducted on the half-mature forests of Larix principis-rupprechtii . Five years later, the comparative analysis of the diameter of the DBH was conducted on the plots. Result shows that: The growth of DBH is in turn the second group of plots (swamping by taking 0.5 m as radius and taking root as the center of a circle)> The first set of plots (without cutting operation)> The third set of plots (swamping by taking 1 m as radius and taking root as the center of a circle)> The fourth group (full cut swamping);the effect of swamping on the growth of DBH of Larix principis-rupprechtii half-mature forest is not very large;the low-intensity small-area swamping can help the diameter growth of Larix principis-rupprechtii half-mature forest;comprehensive swamping is most unfavorable to the growth of the DBH of Larix principis-rupprechtii .

关 键 词：华北落叶松 割灌 胸径 

分 类 号：S791.22[农业科学—林木遗传育种]