目标树经营对马尾松人工林不同土层深度土壤线虫群落结构的影响  

Effects of target tree management of Pinus massoniana plantation on soil nematode community structure at different soil depths

作　　者：余安卫 胡汶廷 吴思颖 尹海锋 范川[1,2,3] 李贤伟 YU Anwei;HU Wenting;WU Siying;YIN Haifeng;FAN Chuan;LI Xianwei(College of Forestry,Sichuan Agricultural University,Chengdu 611130,China;Key Laboratory of National Forestry and Grassland Service on Forest Resources Conservation and Ecological Safety in the Upper Reaches of the Yangtze River,Chengdu 611130,China;Sichuan Province Key Laboratory of Ecological Forestry Engineering on the Upper Reaches of the Yangtze River,Chengdu 611130,China)

机构地区：[1]四川农业大学林学院,成都611130 [2]长江上游森林资源保育与生态安全国家林业与草原局重点实验室,成都611130 [3]长江上游林业生态工程四川省重点实验室,成都611130

出　　处：《应用生态学报》2023年第2期359-368,共10页Chinese Journal of Applied Ecology

基　　金：德国政府贷款四川林业可持续经营管理项目(G1403083);科技部2017年度专项(2017YFD0600302-05);四川农业大学科研兴趣培养项目(2022369)资助。

摘　　要：为研究不同土层深度土壤线虫群落结构及其对目标树经营的响应机制,以马尾松人工林目标树经营样地和对照样地为研究对象,采集了土壤样品(0~10、10~20和20~50 cm)和凋落物样品,分析了土壤线虫群落结构、土壤环境因子及其相互关系。结果表明:目标树经营提高了土壤线虫数量,其中对0~10 cm土层中线虫数量的影响最显著;采用目标树经营的处理以植食性线虫数量最多,对照以食细菌线虫数量最多。与对照相比,目标树10~20 cm土层的土壤线虫Shannon多样性指数、丰富度指数、成熟度指数和20~50 cm土层Shannon多样性指数显著提高。Pearson相关性分析和冗余分析显示,土壤pH、全磷、有效磷、全钾和速效钾是影响土壤线虫群落结构和群落组成的主要环境因子。目标树经营改善了土壤微环境,有利于土壤线虫生存和发展,推动了马尾松人工林的可持续发展。To understand soil nematode community structure at different soil depths and its responses to target tree management,we collected soil samples(0-10,10-20,and 20-50 cm)and litter samples from the target tree management plots and control plots of Pinus massoniana plantation and analyzed community structure,soil environmental factors,and their relationship.The results showed that target tree management increased the abundance of soil nematodes,with the most significant effect at a depth of 0-10 cm.The highest abundance of herbivores was found in the target tree management treatment,while that of bacterivores was found in the control.Compared with the control,Shannon diversity index,richness index,maturity index of nematodes at 10-20 cm soil layer and Shannon diversity index at 20-50 cm soil layer of target trees were significantly improved.According to the results of Pearson correlation and redundancy analysis,soil pH,total phosphorus,available phosphorus,total potassium,and available potassium were the main environmental factors affecting community structure and composition of soil nematodes.In general,target tree management was conducive to the survival and development of soil nematodes and promoted the sustainable development of P.massoniana plantations.

关 键 词：土壤线虫 群落结构 土层深度 目标树经营 马尾松人工林 

分 类 号：S791.248[农业科学—林木遗传育种] S714.3[农业科学—林学]