中小型土壤动物群落对华西雨屏区常绿阔叶林氮沉降的响应  

Response of Meso and Micro-Soil Fauna to Nitrogen Deposition in an Evergreen Broad-Leaved Forest in the Rainy Area of Western China

作　　者：高雅荣 雷应雪 涂利华 肖玖金 鲁琴琴[1,2] 刘梅 涂程伟 田娇娇 王洁 张亚 黄玉梅 张健[1,2] GAO Yarong;LEI Yingxue;TU Lihua;XIAO Jiujin;LU Qinqin;LIU Mei;TU Chengwei;TIAN Jiaojiao;WANG Jie;ZHANG Ya;HUANG Yumei;ZHANG Jian(Forestry Ecological Engineering in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province/National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of Yangtze River,Chengdu 611130,China;College of Forestry,Sichuan Agricultural University,Chengdu 611130,China;Wuxiang Forest Farm in Hanzhong City,Hanzhong 723000,Shaanxi,China;Pengzhou Planning and Natural Resources Bureau,Pengzhou 611930,Sichuan,China;College of Landscape Architecture,Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[1]长江上游林业生态工程四川省重点实验室/长江上游森林资源保育与生态安全国家林业和草原局重点实验室,成都611130 [2]四川农业大学林学院,成都611130 [3]汉中市武乡林场,陕西汉中723000 [4]彭州市规划和自然资源和规划局,四川彭州611930 [5]四川农业大学风景园林学院,成都611130

出　　处：《四川农业大学学报》2024年第3期628-637,共10页Journal of Sichuan Agricultural University

基　　金：四川省自然科学基金面上项目(2022NSFSC0084);四川省科技计划项目(2019YJ0427);国家自然科学基金(31400457)。

摘　　要：【目的】掌握氮沉降对土壤动物群落特征的影响,为亚热带常绿阔叶林的可持续发展提供数据支撑。【方法】自2014年1月起在华西雨屏区进行模拟氮沉降试验,于2021年7月开始进行为期1年的季度采样试验。设置对照0 g/(m^(2)·a)、低氮5 g/(m^(2)·a)和高氮15 g/(m^(2)·a)3个施氮水平,采用干生漏斗对中小型土壤动物进行分离鉴定,研究土壤动物群落特征。【结果】试验共捕获中小型土壤动物8 390只,属2门5纲8目40科,优势类群为弹尾目等节(虫兆)科,占中小型土壤动物总密度的31.05%。土壤动物群落垂直分布表现出明显的表聚性特征。多样性特征均无显著变化。土壤动物功能类群以菌食性、腐食性和捕食性土壤动物为主。【结论】模拟氮沉降在一定程度降低了中小型土壤动物平均密度,增加了土壤动物类群数。氮沉降浓度的增加,不利于中小型土壤动物的生存发展。【Objective】Mastering the impact of nitrogen deposition on soil fauna community characteris⁃tics,providing data support for the sustainable development of subtropical evergreen broad-leaved forests.【Method】From January 2014,a simulated nitrogen deposition experiment was conducted in an evergreen broad-leaved forest in the Rainy Area of Western China.Three nitrogen levels(control(0 g/(m^(2)·a)),low nitrogen(5 g/(m^(2)·a))and high nitrogen(15 g/(m^(2)·a))were set.To study the charac⁃teristics of soil fauna community,we isolated and identified the meso and micro-fauna by using a dry fun⁃nel method.【Result】The results showed that 8390 meso and micro-fauna were captured during the study period, belonging to 2 phylums, 5 classes, 8 orders and 40 families. The dominant groups were Iso⁃ tomidae, accounting for 31.05% of the total density of soil fauna. The vertical distribution of soil fauna community showed obvious characteristics of surface clustering. There were no significant changes in the diversity characteristics. The functional groups of soil fauna were mainly microorganism-feeding, scav⁃ enging and predatory soil fauna. 【Conclusion】 Simulated N deposition decreased the average density of soil fauna, while promoted the number of soil fauna groups. The increasing nitrogen deposition is not con⁃ ducive to the survival and development of meso and micro-fauna.

关 键 词：华西雨屏区 常绿阔叶林 模拟氮沉降 中小型土壤动物群落 响应 

分 类 号：S714.3[农业科学—林学]