广西师范大学学报（自然科学版）2025，Vol.43Issue(4)：201-212,12.DOI:10.16088/j.issn.1001-6600.2024071901
不同林分密度对杉木林土壤特性及林下植被的影响
Effects of Different Stand Densities on Soil Properties and Understory Vegetation in Chinese fir Plantation
摘要
Abstract
In order to understand the effects of different stand retention densities on the soil characteristics of Cunninghamia lanceolate plantations,the soil water content,stoichiometric ratio,enzyme activity and understory vegetation diversity of Chinese fir plantations under different stand retention densities were studied in the experimental forests with different stand retention densities in Yangkou State Owned Forest Farm in Fujian Province.The results showed that:1)There was no significant effect on the species richness index and Shannon-Wiener index in the understory vegetation diversity of Chinese fir plantations under different retention densities(P>0.05),but it had a great impact on Simpson index and Pielou evenness index.2)There were significant differences in soil chemical properties among different stand retention densities(P<0.05),as stand retention density increased,total carbon content of soil increased first and then decreased.Soil total nitrogen decreased first and then increased.3)The retention density of different stands had a significant effect on soil enzyme activity(P<0.05),among which,with the increase of stand retention density,the activities of polyphenol oxidase and acid phosphatase decreased in soil,while the activities of soil urease and soil sucrase increased.4)Different stand retention densities had significant effects(P<0.05)on soil microbial dominant bacterial communities,and low stand density treatment could improve the structural diversity of soil microbial bacterial communities to some extent.In the correlation analysis between soil bacterial communities and physicochemical properties,TP,effective phosphorus content(AP)and soil dominant bacterial group(Actinobacteria)were highly significantly correlated(P<0.01).TC and TN were highly significantly correlated(P<0.01)with the dominant bacterial group(Zoopagomycota).Overall,low stand retention density is the best choice for planting Chinese fir plantations.关键词
林分密度/杉木人工林/土壤酶活/植被多样性/土壤微生物Key words
stand density/Cunninghamia lanceolata plantation/soil enzyme activity/vegetation diversity/soil microorganism分类
农业科技引用本文复制引用
左晓东,汪星星,许祖元,郑宏,曹光球,曹世江..不同林分密度对杉木林土壤特性及林下植被的影响[J].广西师范大学学报（自然科学版）,2025,43(4):201-212,12.基金项目
"十四五"国家重点研发计划项目(2021YFD2201302) （2021YFD2201302）
