摘要
为培育杉木大径级无节柱材,探讨修枝对杉木人工林生长和材种结构的影响,选择17年生中龄林,设置修枝与不修枝处理试验,20 a后调查中龄林修枝处理对杉木人工林生长和材种结构影响。结果表明:修枝后的前两年,修枝处理显著提高了杉木人工林的胸径年生长量(P<0.05),对树高、林分蓄积量年生长量没有显著影响,随后修枝处理对杉木人工林生长的影响逐渐减弱。中龄林修枝处理20 a对杉木人工林的胸径、树高、林分蓄积量和总生物量均没有显著影响,但显著提高了杉木人工林干生物量分配比例(P<0.05),显著降低了叶生物量分配比例(P<0.05)。中龄林修枝处理20 a显著提高了杉木人工林大径材出材率(P<0.05),有利于杉木人工林大径无节柱材培育。
This study investigates the impact of pruning on tree growth and the timber type structure of a 17-year-old middle-aged Chinese fir plantation,with a focus on cultivating knot-free Chinese fir logs.We established pruning and non-pruning treatments and observed their effects after 20 years.The results indicate that pruning significantly increased the annual growth of diameter at breast height(DBH)during the first two years(P<0.05).However,it did not have a significant impact on annual tree height growth or stand volume.Over time,the effect of pruning on the growth of the Chinese fir plantation gradually diminished,with no significant impact on DBH,tree height,or stand volume after 20 years.Additionally,pruning did not significantly affect the total biomass of the plantation after two decades but did increase the proportion of trunk biomass allocation(P<0.05)while decreasing the proportion of leaf biomass allocation(P<0.05).Furthermore,pruning significantly enhanced the yield of large-diameter timber after 20 years(P<0.05),which proved beneficial for cultivating knot-free logs from the Chinese fir plantation.
作者
江宇
黄瑜成
林华章
吴鹏飞
李明
马祥庆
JIANG Yu;HUANG Yucheng;LIN Huazhang;WU Pengfei;LI Ming;MA Xiangqing(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 Datian State-owned Forest Farm,Datian,Fujian 366100,China)
出处
《森林与环境学报》
CSCD
北大核心
2024年第1期13-19,共7页
Journal of Forest and Environment
基金
国家重点研发项目“杉木大径级无节良材培育技术”(2021YFD2201302)。
关键词
修枝
杉木
生长
生物量
中龄林
pruning
Chinese fir
growth
biomass
middle-aged plantation
