摘要
为了解不同林分密度对杉木Cunninghamia lanceolate人工林土壤特性的影响,以福建省洋口国有林场的不同林分密度的实验林为研究对象,对不同林分密度下杉木人工林的土壤含水量、化学计量比、酶活及林下植被多样性进行研究,结果表明:1)各个密度对杉木人工林林下植被多样性中的物种丰富度指数和Shannon-Wiener指数无显著性影响(P>0.05),对Simpson指数和Pielou均匀度指数却有较大影响。2)不同林分密度对土壤化学性质有显著差异(P<0.05),随着林分密度的上升,土壤全碳含量先增加后减少,土壤全氮先下降后上升。3)不同林分密度对于土壤酶活性具有显著影响(P<0.05),其中,随着林分密度的上升,土壤的多酚氧化酶、酸性磷酸酶活性降低,而土壤脲酶和土壤蔗糖酶活性增加。4)不同林分密度对土壤微生物优势菌群存在显著影响(P<0.05),低林分密度一定程度上可以提高土壤微生物细菌群落结构多样性。在土壤细菌群落与理化性质相关性分析中,全磷(TP)、有效磷(AP)含量与土壤优势菌群Actinobacteria呈极显著相关(P<0.01)。全碳(TC)、全氮(TN)与优势菌群Zoopagomycota呈极显著相关(P<0.01)。总体而言,低林分密度是杉木人工林种植的最佳选择。
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.
作者
左晓东
汪星星
许祖元
郑宏
曹光球
曹世江
ZUO Xiaodong;WANG Xinxin;XU Zuyuan;ZHENG Hong;CAO Guangqiu;CAO Shijiang(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou Fujian 350002,China;National Forestry and Grassland Chinese fir Engineering Technology Research Center,Fuzhou Fujian 350002,China;Xiamen Ocean Vocational College,Xiamen Fujian 361100,China;Fujian Yangkou State Owned Forest Farm,Nanping Fujian 353200,China)
出处
《广西师范大学学报(自然科学版)》
北大核心
2025年第4期201-212,共12页
Journal of Guangxi Normal University:Natural Science Edition
基金
“十四五”国家重点研发计划项目(2021YFD2201302)。
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
stand density
Cunninghamia lanceolata plantation
soil enzyme activity
vegetation diversity
soil microorganism
作者简介
通信作者:曹世江(1984-),男,吉林长春人,福建农林大学副教授,博士。E-mail:csjiang1123@126.com。
