密度及修枝对幼林杉木节子伤口愈合的影响  

Effect of density and pruning on knot wound healing in young Cunninghamia lanceolata stands

作　　者：魏理晖 叶小鹏 陈志云 何宗明[1,2] 马祥庆 帅鹏[1,2] WEI Lihui;YE Xiaopeng;CHEN Zhiyun;HE Zongming;MA Xiangqing;SHUAI Peng(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Chinese Fir Engineering Technology Research Center,National Forestry and Grassland Administration,Fuzhou,Fujian 350002,China;Fujian Shaowu Weimin State-owned Forest Farm,Shaowu,Fujian 354006,China)

机构地区：[1]福建农林大学林学院,福建福州350002 [2]国家林业草原杉木工程技术研究中心,福建福州350002 [3]福建省邵武卫闽国有林场,福建邵武354006

出　　处：《森林与环境学报》2024年第6期639-646,共8页Journal of Forest and Environment

基　　金：“十四五”国家重点研发课题“杉木大径级无节良材培育技术”(2021YFD2201302);福建省种业创新与产业化工程(2021—2025年)林业项目“杉木高世代良种创新与产业化工程”(ZYCX-LY-2021004)。

摘　　要：为探究修枝处理下幼林杉木节子伤口愈合情况,以福建省邵武卫闽国有林场6年生杉木人工林为研究对象,设计不同修枝强度、保留密度、节子方向、伤口直径、喷漆保护等试验,统计分析修枝20个月后幼林杉木节子的伤口愈合率变化。结果表明:不同修枝强度对幼林杉木节子的横向伤口愈合率有显著影响(P<0.05),横向伤口愈合率大小依次为10 cm修枝强度>12 cm修枝强度>8 cm修枝强度。保留密度为1800株·hm^(-2)的幼林杉木节子伤口愈合最快,其中,在8 cm修枝强度下节子伤口愈合率随杉木幼林保留密度的增大而增大;在10 cm修枝强度下节子伤口愈合率随杉木幼林保留密度的增大呈现先减小后增大。东北方向的节子伤口愈合最快,西南方向的节子伤口愈合最慢,不同节子方向对伤口愈合率没有显著影响(P>0.05)。不同节子伤口直径对伤口愈合率没有显著影响(P>0.05)。喷漆保护对杉木节子伤口愈合率没有显著影响(P>0.05)。从总体上看,不同处理下节子横向伤口愈合率总是大于纵向,说明横向伤口会更早完全愈合。To explore the wound healing of knots in young Chinese fir stands,this study used 6-year-old Chinese fir plantations in the Weimin State-owned Forest Farm in Shaowu,Fujian Province,as research subjects.Experiments were designed using different pruning intensities,retention densities,knot directions,wound diameters,and paint protection.The healing rate of wounds was statistically analyzed over 20 months after pruning.Different pruning intensities were found to have significant effects on the healing rate of transverse wounds in young Chinese fir stands(P<0.05),with the order of transverse wound healing rates being 10 cm pruning intensity>12 cm pruning intensity>8 cm pruning intensity.The fastest wound healing rate was observed at a retention density of 1800 tree·hm^(-2);where under a pruning intensity<8 cm,the knot healing rate of wounds increased with the increase in retention density of the young Chinese fir stands;a pruning intensity<10 cm resulted in the knot healing rate of wounds first decreasing and then increasing with the increase in retention density of the young Chinese fir stands.Knot wounds on the northeast side healed the fastest,while those on the southwest side healed the slowest,although different knot directions,different knot wound diameters,and paint protection had no significant effects on the healing rate of Chinese fir knot wounds(P>0.05).In general,the healing rate of transverse wounds was always greater than that of longitudinal wounds under different treatments,indicating that transverse wounds would be completely healed sooner.

关 键 词：杉木 修枝 节子 伤口愈合 修枝强度 保留密度 

分 类 号：S791.27[农业科学—林木遗传育种]