杉木幼龄期良种与密度控制的生长动态效应  

Effects of Improved Varieties and Densities on the Dynamic Growth of Young Chinese Fir(Cunninghamia lanceolata)Plantation

作　　者：李晓燕 段爱国[1] 张建国[1,2] 赵世荣 冯随起 LI Xiao-yan;DUAN Ai-guo;ZHANG Jian-guo;ZHAO Shi-rong;FENG Sui-qi(Research Institute of Forestry,zhinese Academy of Forestry,Key Laboratory of Tree Breeding and Cultivation,National Forestry and Grassland Administration,State Key Laboratory of Tree Genetics and Breeding,Beijing 100091,China;The Southern National Forestry Collaborative Innovation Center,Nanjing Forestry University,Nanjing 210037,China;State-owned Forestry Farm of Weimin,Shaowu,Fujian Province,Shaowu,Fujian 354006,China)

机构地区：[1]中国林业科学研究院林业研究所/国家林业和草原局林木培育重点实验室/林木遗传育种国家重点实验室,北京100091 [2]南京林业大学南方现代林业协同创新中心,江苏南京210037 [3]福建省邵武卫闽国有林场,福建邵武354006

出　　处：《江西农业大学学报》2020年第4期778-787,共10页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家“十二五”科技计划项目(2015BAD09B0101);国家“十三五”重点研发计划项目(2016YFD0600302);国家自然科学基金项目(31570619)。

摘　　要：【目的】探讨杉木良种和初植密度2个控制因子对杉木幼龄期林分生长的影响及其互作效应,旨在为杉木良种与初植密度的优化配置提供理论依据,以切实通过良种良法的有效结合提升杉木人工林产量与质量。【方法】采用随机区组试验设计,在福建省邵武卫闽国有林场营造杉木良种和初植密度互作试验林,根据8年的逐年定位观测资料,分析杉木良种和密度控制的林分生长动态效应。【结果】林分生长前期密度效应差异不显著,后期随林龄增长各密度间树高、胸径、冠幅、单株材积生长差异逐渐增大,一般到7~8 a时,各密度间生长差异达显著性水平;整个调查期间,各密度间蓄积量生长差异达极显著水平。在6 a时,冠幅生长的良种效应差异达显著性水平,8 a时,胸径生长的良种效应差异达显著性水平;整个调查期间,树高、单株材积和蓄积量生长的良种效应未达显著性水平。初植密度与良种水平交互作用对幼龄期林分生长未达显著性水平。【结论】良种和初植密度对杉木幼龄期林分生长的影响具有叠加效应,且随林龄增长,这种叠加效应愈明显,8 a时,林分平均单株材积在3世代良种和初植密度为1667株/hm^2这一组合下最大,为0.0372 m^3,比其他组合至少高27.96%;而蓄积量在3世代良种和初植密度为6667株/hm^2这一组合下最大,为75.3865 m^3/hm^2,比其他组合至少高2.91%。[Objective]This study aimed to explore the effects of different improved varieties and densities on the dynamic growth of young Chinese fir(Cunninghamia lanceolata)plantation and their interaction and provide a theoretical basis for the optimal distribution of improved varieties and densities and improve the yield and quality of Chinese fir plantation.[Method]Interactive test forest of improved varieties and initial planting densities of Chinese fir was built with randomized block in the state-owned forestry farm of Weimin,Shaowu,Fujian Province.Based on the stand survey data of eight years,the effects of different improved varieties and densities on the dynamic growth of Chinese fir plantation were analyzed.[Result]In the early stage of stand growth,the difference in the density effect was not significant,and in the later stage,the growth difference in tree height,DBH,crown width and stem volume among different densities increased with age,and the difference reached a significant level by the year 7-8.During the whole survey period,the growth difference in stand volume among different densities was very significant.At the age of 6 years,the effect of improved varieties on the crown width growth reached a significant level,and that of DBH growth was at the age of 8 years.However,there was no significant difference in tree height,volume and stand volume at the improved varieties level.The interaction between the initial planting densities and improved varieties had no significant effect on the stand growth.[Conclusion]Improved varieties and initial planting densities have an addictive effect on young Chinese fir plantation,and the addictive effect is more obvious with age.At the age of 8 years,the stem volume is the largest in the combination of the third generation seed orchard and 1667 trees/hm^2,and its value is 0.0372 m^3,and at least 27.96% higher than that of other combinations.The stand volume is the largest in the combination of the third generation seed orchard and 6667 trees/hm^2,and its value is75.3865

关 键 词：杉木 幼龄林 良种 初植密度 互作效应 

分 类 号：S791.27[农业科学—林木遗传育种] S718.5[农业科学—林学]