抚育间伐对华北落叶松人工林林木生长的影响  

Effect of Tending Thinning on the Growth of Larix gmelinii var. principis-rupprechtii Plantation

作　　者：董刚毅 DONG Gang-yi(Wucheng Forest Farm,Guandi Mountain State Forestry Administration,Lvliang,Shanxi 033017)

机构地区：[1]山西省关帝山国有林管理局吴城林场,山西吕梁033017

出　　处：《园艺与种苗》2025年第2期55-57,共3页Horticulture & Seed

摘　　要：[目的]研究抚育间伐对华北落叶松人工林林木生长的影响,寻求最佳抚育间伐强度,以期获得科学的经营管理依据。[方法]在山西省关帝山林区吴城林场设置了12块华北落叶松间伐试验样地,通过对30年华北落叶松人工林进行不同间伐强度处理,间伐强度为未间伐(对照)、10%间伐强度、15%间伐强度、20%间伐强度,并于间伐后当年及间伐后第3年对华北落叶松进行每木检尺,采用方差分析和多重比较,分析不同间伐强度处理样地的林分生长情况。[结果]抚育间伐能够改善林分结构,促进林分的生长,其中,20%间伐强度对华北落叶松胸径和树高生长的影响较为显著,胸径生长量为1.704 cm,树高生长量为2.052 m,对蓄积量增加的影响并不是最大,但蓄积量增长率最大,蓄积量增加29.952 m^(3)/hm^(2),蓄积量增长率为20.71%。[结论]综合考虑时间因素,20%间伐强度为最佳抚育间伐强度。[Objective]The aim was to study the effect of tending thinning on the growth of Larix gmelinii var.principis-rupprechtii plantation,and to seek the best tending thinning intensity,so as to obtain scientific management basis.[Method]Twelve experimental plots for thinning L.gmelinii var.principis-rupprechtii were set up in Wucheng forest farm.The 30-year L.gmelinii var.principis-rupprechtii plantation was treated with different thinning intensity,including unthinning(CK),10%thinning intensity,15%thinning intensity and 20%thinning intensity.In the year of thinning and the third year after thinning,the stand growth of L.gmelinii var.principis-rupprechtii was analyzed by variance analysis and multiple comparison.[Result]Ending thinning could improve the stand structure and promote the growth of the stand.Among them,20%thinning intensity had a significant effect on the growth of DBH and height of L.gmelinii var.principis-rupprechtii.The growth of DBH was 1.704 cm,and the growth of height was 2.052 m.20%thinning intensity had not the largest effect on the increase of stock volume of L.gmelinii var.principis-rupprechtii,but the growth rate of stock volume was the largest.The stock increased to 29.952 m^(3)/hm^(2),with a growth rate of 20.71%.[Conclusion]Considering the time factor comprehen-sively,20%thinning intensity was the best thinning intensity for tending.

关 键 词：抚育间伐 华北落叶松 人工林 胸径 树高 蓄积量 

分 类 号：S753[农业科学—森林经理学]