闽楠-杉木人工混交林混交比对闽楠生长形质和空间利用能力的影响  

The Impact of Mixing Ratio in Artificial Mixed Forests of Phoebe bournei-Cunninghamia lanceolata on the Growth Morphology and Spatial Utilization Ability of Phoebe bournei

作　　者：周新华[1] 孙韵 王丽云[1] 沈丽丽 易宜萍 阳武 厉月桥[1] Zhou Xinhua;Sun Yun;Wang Liyun;Shen Lili;Yi Yiping;Yang Wu;Li Yueqiao(Experimental Center for Subtropical Forestry,Chinese Academy of Forestry,Fenyi·Jiangxi 336600,P.R.China;Forestry Bureau of Fenyi,Jiangxi Province)

机构地区：[1]中国林业科学研究院亚热带林业实验中心,江西分宜336600 [2]江西省分宜县林业局

出　　处：《东北林业大学学报》2024年第5期13-18,共6页Journal of Northeast Forestry University

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020MB004)。

摘　　要：为了分析混交比例对闽楠-杉木人工混交林中闽楠生长形质性状、空间利用能力的影响,明确珍贵用材树种闽楠的经营方向,以江西省分宜县上村实验林场6年生闽楠-杉木人工混交林和闽楠纯林为研究对象,分析不同混交比例处理对闽楠生长、干形形质、空间利用能力的影响,并通过主成分分析方法综合评价不同混交比例的闽楠生长表现,筛选出最佳混交模式。结果表明:(1)混交处理促进了闽楠生长,改善了闽楠干形形质。2楠1杉混交处理中,闽楠的胸径、树高、单株材积、枝下高、枝下高比例均为最大,分别比闽楠纯林增加了21.44%、31.78%、79.41%、48.00%、30.23%(P<0.05);但尖削度和胸高形数均小于闽楠纯林,尖削度和胸高形数分别降低了24.43%、7.20%。(2)混交处理提升了闽楠的空间利用能力。混交林的平均冠幅、冠高、树冠体积、树冠表面积、生长空间指数均显著高于闽楠纯林,各指标分别提高了6.49%~10.27%、11.28%~27.89%、45.36%~86.09%、27.56%~44.39%、13.24%~36.76%;但混交林的树冠圆满度均低于闽楠纯林。(3)混交处理能够改善闽楠的生长特征和空间利用能力,综合评价得分由高到低依次为2楠1杉(2.282)、1楠1杉(1.479)、3楠1杉(0.973)、纯林(-1.365),2楠1杉混交处理为最优混交比例。因此,营建闽楠-杉木人工混交林可提升闽楠的生长形质和空间利用能力。In order to analyze the impact of mixing ratio in plantation mixed forests of Phoebe bournei-Cunninghamia lanceolata on the growth morphology and spatial utilization ability of P. bournei , and to clarify the management direction of the valuable timber species P. bournei . Using 6-year-old P. bournei-C. lanceolata plantation mixed forest and P. bournei pure forest in Shangcun Experimental Forest Farm, Fenyi County, Jiangxi Province as the research objects, this study analyzed the effects of different mixing ratio treatments on the growth, stem form morphology, and spatial utilization ability of P. bournei . The study also comprehensively evaluated the growth performance of P. bournei under different mixing ratios using principal component analysis method, and selected the optimal mixing model. The results showed that: (1) Mixing treatments promoted the growth of P. bournei and improved the stem form morphology. In the 2:1 P. bournei-C. lanceolata mixed treatment, the diameter at breast height, tree height, individual tree volume, height under branch, and proportion of height under branch of P. bournei were all the largest, increasing by 21.44%, 31.78%, 79.41%, 48.00%, and 30.23% respectively compared to the P. bournei pure forest ( P <0.05). However, the degree of sharp cutting and the number of chest height shapes were lower than in the P. bournei pure forest treatment, with a decrease of 24.43% and 7.20%, respectively. (2) Mixing treatments improved the spatial utilization ability of P. bournei . The average crown width, crown height, crown volume, crown surface area, and growing space index of the mixed forest were significantly higher than those of the P. bournei pure forest, with respective increases of 6.49%-10.27%, 11.28%-27.89%, 45.36%-86.09%, 27.56%-44.39%, and 13.24%-36.76%. However, the crown fullness of the mixed forest was lower than that of the P. bournei pure forest. (3) Mixing treatments could improve the growth characteristics and spatial utilization ability of P. bournei . The comprehensive eval

关 键 词：闽楠 杉木 混交比例 生长形质 空间利用能力 

分 类 号：S725.2[农业科学—林木遗传育种]