云南松幼林生长对间伐和修枝的响应  

Growth Response of Juvenile Pinus yunnanensis Plantation to Thinning and Pruning

作　　者：王凯[1] 李莲芳[1] 付志高 高誉衡 叶桂荣 彭思华 张青青 杨永洁 吴柏良 杨历雨 WANG Kai;LI Lian-fang;FU Zhi-gao;GAO Yu-heng;YE Gui-rong;PENG Si-hua;ZHANG Qing-qing;YANG Yong-jie;WU Bai-liang;YANG Li-yu(Southwest Forestry University,Kunming Yunnan 650224,P.R.China)

机构地区：[1]西南林业大学,云南昆明650224

出　　处：《西部林业科学》2021年第2期116-123,共8页Journal of West China Forestry Science

基　　金：国家“十三五”重点研发计划-林业资源培育及高效利用技术创新重点专项(2017YFD0600504-1)资助。

摘　　要：为了解间伐和修枝抚育经营对云南松幼林生长的影响,以昆明市宜良县禄丰林场的尖山林区12 a生1 m×2 m×5 m的非均匀密度控制造林的云南松人工林为研究对象,采用L 4(23)正交试验设计开展试验研究,并于抚育前和抚育后1 a和2 a时进行逐株对应测定和分析。结果表明,抚育后2 a时,处理组合的平均胸径、树高和材积增长率分别为16.2%~24.4%、33.7%~36.5%和68.8%~93.3%,对照则为10.8%、27.1%和46.4%;同时,抚育处理组合的单位面积蓄积量达69.0~82.7 m^(3)/hm^(2)(对照为120.0 m^(3)/hm^(2),对照未间伐,故抚育前后的蓄积量相同),其增长率与抚育前和抚育后的相比较,分别提高10.4%~37.4%和64.5%~83.9%(对照的仅提高47.6%)。处理组合间,生长指标的增长率呈现极显著的差异(P<0.01),因素水平间,生长量和蓄积量增长率随抚育后1、1~2和0~2 a时的时间变化,呈现动态变化。综合分析抚育后2 a的云南松幼林生长指标增长率,间伐强度53.3%,采用砍刀修枝后保留4轮枝条的组合是该林分较优的处理抚育措施。因此,在生产实践中,此措施可作为短期内促进云南松幼林林木生长的间伐和修枝措施加以应用。In order to understand the effects of thinning and pruning on the growth for a 12-year-old juvenile Pinus yunnanensis plantation reforested with uneven-row spacing density of the 1 m×2 m×5 m in Jianshan Forest Zone of Lufeng Forest Farm,Yiliang County,Kunming,the trial was implemented by employed the L 4(23)orthogonal design.The corresponding measurement and growth analysis of tree by tree were carried out before and the 1 and 2 years after tending.The results showed that the growth rates of diameters at breast height(DBHs),tree heights(THs)and individual tree timber volumes(ITVs)of treatment combinations(TCs)were 16.2%-24.4%,33.7%-36.5%and 68.8%-93.3%,respectively,while which of the control were 10.8%,27.1%and 46.4%for 2 years after tending;at the same period,the timber volumes per unit area(TVs)of tendingTCs were 69.0-82.7 m^(3)/hm^(2)(120.0 m^(3)/hm^(2)of the contol which non thinning,thus there was the same TV before and after tending),with increasing 10.4%-37.4%and 64.5%-83.9%of the TCs compared to which of before and after tending(the 47.6%of the control).There were significant differences in increasing rates of growth paramwtere between the TCs(P<0.01).The rates of growth and the TVs showed dynamic changes with the 1,1-2 and 0-2 years of time changes after tendingbetween factorial levels.Comprehensive analysis of growth increasing rates for two years after tending,the TC of the 53.3%thinning intensity combined retaining four rounds of branches after pruning with machete was the best TC for the stand.In production practice,this measure could be used as thinning and pruning approaches to promote the growth of trees in a short time.

关 键 词：云南松 间伐强度 修枝强度及方式 幼林抚育 生长 增长率 

分 类 号：S791.257[农业科学—林木遗传育种]