文献类型：期刊文献

中文题名：杉楠不同近自然改造模式对杉木林分生长及材种出材量的影响

英文题名：Effects of close-to-nature silviculture mixed with Phoebe bournei in Chinese fir plantations on stand growth and timber assortment output of Chinese fir

作者：江怡航[1,2] 胡宇欣[1] 刘振华[3] 李党仁[4] 刘娜[1] 潘红林[1] 张建国[1] 张雄清[1,2]

第一作者：江怡航

机构：[1]林木资源高效生产全国重点实验室,国家林业和草原局林木培育重点实验室,中国林业科学研究院林业研究所,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]湖南林业科学院,湖南长沙410000;[4]湖南省临武县西山国有林场,湖南郴州424300

年份：2024

卷号：44

期号：12

起止页码：51-58

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：“十四五”国家重点研发计划课题(2021YFD2201304)。

语种：中文

中文关键词：杉木;闽楠;近自然改造;林分生长;材种出材量

外文关键词：Cunninghamia lanceolata;Phoebe bournei;close-to-nature silviculture;stand growth,timber assortment output

分类号：S791.27

摘要：【目的】杉木林下套种闽楠的近自然改造模式是当前我国杉木人工林近自然改造的主要技术模式。研究杉木-闽楠不同近自然改造模式对杉木林分生长以及材种结构的影响,可为杉木大径材培育目标下筛选适宜的杉木-闽楠近自然改造模式提供重要依据。【方法】以湖南郴州西山林场杉木-闽楠近自然改造试验林为研究对象,设置3个不同的杉木-闽楠近自然改造模式和1个纯林对照,并对不同模式下杉木的胸径、树高、冠幅、单木材积和蓄积量以及杉木大、中、小径材的出材量和出材率进行分析比较。【结果】相比于对照纯林模式,除林分蓄积量外,3种近自然改造模式的杉木平均胸径、平均树高、平均冠幅及单木平均材积均大于对照模式,不同模式下杉木胸径、树高、冠幅、单木材积和蓄积量均存在极显著差异(P<0.01)。同时,不同模式的大、中、小径材出材率差异极显著(P<0.01)。4种模式的大径材出材量和出材率大小排序为T1>T2>T3>CK,即杉木大径材的出材量和出材率随杉木占比的增大而减小。杉木大径材的材种出材量与杉木平均胸径、林分优势高、平均冠幅正相关,而与杉木保留密度负相关。【结论】与杉木纯林相比,杉木-闽楠近自然改造模式可以促进杉木的生长。近自然改造模式T1(3杉7楠)下,有利于培育杉木大径材。较低的杉木保留密度更有利于优化林分的材种结构,培育杉木大径材及超大径材。
【Objective】Close-to-nature silviculture of Chinese fir plantations mixed with Phoebe bournei is the widely silviculture mode in China.Exploring the effects of close-to-nature silviculture mixed with P.bournei in Chinese fir plantations on forest growth and timber assortment output of Chinese fir provides insight into selecting suitable silviculture mode for large-size timber production.【Method】Based on the Chinese fir forests mixed with P.bournei in Chenzhou Xishan Forest Farm,Hunan,four treatments were set in the study,including three close-to-nature silviculture modes mixing with P.bournei and one control mode.The diameter at breast height,tree height,crown width,tree volume and stand volume of Chinese fir as well as the timber assortment output were analyzed and compared under different modes.【Result】Compared with the control mode,other than the stand volume,the mean diameter at breast height,mean tree height,mean crown width and mean tree volume of the three close-to-nature silviculture modes were all greater than those of the control mode. There were significant differences between diameter, tree height, crown width, tree volume and stand volume (P < 0.01). Moreover, the timber assortment output rate of Chinese fir was also significantly different (P < 0.01). The large-size timber output and rate of mode T1 were the largest, followed by mode T2, T3, and CK, and the output and rate of large-size timber of Chinese fir decreased with the increase of the proportion of Chinese fir. The large-diameter timber output of Chinese fir was positively correlated with mean diameter, dominant height of stand and mean crown width, but negatively correlated with the retention density of Chinese fir. 【Conclusion】Compared with pure Chinese fir stand, the close-to-nature silviculture modes can significantly promote the growth of Chinese fir. Close-to-nature silviculture mode mixed with P. bournei in Chinese fir forests (T1: the ratio of Chinese fir and P. bournei is 3∶7) is conducive to cultivating large-size timber of Chinese fir. A lower retention density of Chinese fir is helpful for optimizing the timber assortment structure and cultivating large-size /super-large-size woods of Chinese fir.