摘要
以吉林省临江林业局长白落叶松人工林为研究对象,分析不同林分蓄积、间伐强度、冠层结构和林下光环境对草本物种组成及物种多样性的影响。结果表明:随着间伐强度的增加,叶面积指数显著降低,冠层开度显著升高。各处理与对照相比,草本植物重要值大于1%的物种分别增多了12.50%、56.25%和50.00%,35%间伐强度的处理草本物种多样性最高。林下光辐射指标与叶面积指数呈显著负相关(P<0.05),与冠层开度呈显著正相关(P<0.05);Shannon-Wiener多样性指数、Simpson多样性指数与叶面积指数呈显著负相关(P<0.05)。间伐能明显增加长白落叶松人工林下草本物种多样性,建议间伐强度不宜超过35%。
The Larix olgensis plantation in the birch forest farm of Linjiang Forestry Bureau of Jilin Province was taken as the research object, and the sample plots with different stand volume thinning intensity(25%, 35% and 45%) and the control plots(CK) weredetermined. The differences and correlations of canopy structure, light environment and herbaceous species diversity of stands with different thinning intensity were studied. With the increase of thinning intensity, the leaf area index(LAI) decreased significantly(P<0.05), and the canopy opening(CO) increased significantly(P<0.05). Compared with CK treatment, the number of species with herbaceous plant importance values greater than 1% increased by 12.5%, 56.25% and 50.0%, and 35% intensity treatment increased the most. The light radiation index under the forest was sensitive to the change of canopy structure, which was negatively correlated with the LAI and positively correlated with the canopy opening(CO)(P<0.05). Shannon-Wiener index and Simpson index were sensitive to the change of leaf area index and negatively correlated with it(P<0.05). Thinning has a significant effect on the canopy structure, light environment and herbaceous species diversity under the forest. Thinning can significantly increase the herbaceous species diversity under L. olgensis plantation, moreover 35% thinning intensity is the best.
作者
田佳歆
刘盛
冯万斌
赵士博
王诗俊
孙宇
李恩鹏
程福山
Tian Jiaxin;Liu Sheng;Feng Wanbin;Zhao Shibo;Wang Shijun;Sun Yu;Li Enpeng;Cheng Fushan(Beihua University,Jilin 132013,P.R.China;Linjiang Forestry Bureau)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2022年第3期30-34,50,共6页
Journal of Northeast Forestry University
基金
吉林省重点研发项目(20200402091NC)。
关键词
冠层结构
林下光环境
物种多样性
Canopy structure
Light environment under forest
Species diversity
