摘要 [目的]研究抚育间伐对杉木人工林林分生长的影响。[方法]以8年生杉木人工林为研究对象，设5个处理：间伐强度10%（处理①）、间伐强度20%（处理②）、间伐强度30%（处理③）、间伐强度40%（处理④）和对照（CK，不抚育），初次调查和间伐时间为2014年，复查时间为2019年，分析不同处理条件对杉木人工林林分胸径、树高和蓄积生长量的影响。[结果]抚育间伐条件下的林分胸径生长量均大于CK，其中处理④的林分胸径增长量最大;抚育间伐条件下的林分树高生长量均大于CK，其中处理④的林分树高增长量最大;抚育间伐条件下的林分蓄积增长量均大于CK，其中处理③的林分蓄积量最大;抚育间伐条件下的林分枯死率均低于CK，其中处理④的枯死率最低。[结论]抚育间伐可以改善保留木的生长空间、营养空间，可以不同程度地提高林分的胸径、树高生长量和蓄积量，并降低林木的枯死率。

关键词 抚育间伐;直径;树高;杉木;人工林

中图分类号 S 753  文献标识码 A

文章编号 0517-6611（2021）15-0129-02

Abstract [Objective]To study the effect of thinning on the growth of Chinese fir plantation.[Method]Taking the 8yearold Chinese fir plantation as the research object， five treatments were set up， namely， thinning intensity 10% （treatment ①）， thinning intensity 20% （treatment ②）， thinning intensity 30% （treatment ③）， and thinning intensity 40% （treatment ④）  and control （CK， no tending）.The initial investigation and thinning time were in 2014， and the re-inspection time was in 2019. The effects of different treatment conditions on the diameter， height and volume growth of Chinese fir plantations were analyzed. [Result]The growth of stand diameter at breast height under the condition of tending and thinning was greater than that of CK， and the growth of stand diameter under the condition of treatment ④ was the largest.The growth of tree height under the condition of tending and thinning was larger than that of CK， and the growth of tree height under the condition of treatment ④ was the largest.The growth of stand volume under the condition of tending and thinning was all greater than that of CK， and the stand volume of treatment ③ was the largest.The stand death rate under the condition of tending and thinning was lower than that of CK， and the death rate of treatment ④ was the lowest.[Conclusion]Tending thinning can improve the growth space and nutrient space of the reserved wood， increase the diameter at breast height， the height of the tree growth and the volume of the forest to varying degrees， and reduce the death rate of the forest.

Key words Tending thinning;Diameter;Tree height;Fir;Plantation

作者簡介 汪建新（1972—），男，安徽石台人，工程师，从事森林培育研究。

收稿日期 2021-03-10;修回日期 2021-04-07

随着我国社会经济快速发展，林产品需求量不断增加，人工林在木材生产中发挥的作用越来越显著[1]。工业和城市发展对森林资源的利用导致森林面积不断减少，林地退化，仅天然林提供的资源难以满足社会发展的需求，因此，人工林已逐渐成为满足社会、环境可持续发展需求的主体[2]。杉木是我国重要的用材树种，造林历史悠久，具有生长速度快、材质优良等优点，在我国南方造林面积较大。……