野青茅根系和叶分解过程中土壤动物群落特征  

Community characteristics of the soil fauna associated with decomposing roots and litter of Deyeuxia arundinacea

作　　者：肖玖金[1,2] 赵波[1,2] 周开伦[3] 廖扬羲 彭彩云 罗熳丽[1,2] 张健 XIAO Jiujin;ZHAO Bo;ZHOU Kailun;LIAO Yangxi;PENG Caiyun;LUO Manli;ZHANG Jian(Forestry College of Siehuan Agricultural University,Chengdu 611130,China;Institute of Ecological Forestry,Siehuan Agricultural University,Chengdu 611130,China;Dujiangyan Campus of Sichuan Agricultural University,Chengdu 611830,China)

机构地区：[1]四川农业大学林学院,成都611130 [2]四川农业大学生态林业研究所,成都611130 [3]四川农业大学都江堰校区,成都611830

出　　处：《应用与环境生物学报》2018年第5期1179-1184,共6页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金青年科学基金项目(314 0 0 457);长江上游生态安全协同创新中心开放基金项目;四川省景观与游憩研究中心项目(JGYQ2018032)资助~~

摘　　要：为了解多年生草本野青茅（Deyeuxia arundinacea）根系和叶分解过程中土壤动物群落特征，于2013年8月．2014年7月采用分解袋法对野青茅根系和叶分解过程中土壤动物群落进行调查．结果显示：野青茅根系和叶分解过程中土壤动物个体数分别为1321头和958头，类群数分别为37个和25个根系和叶分解过程中，土壤动物各多样性指数具有相似的变化趋势，其中，Shannon—Wiener指数、均匀度指数和丰富度指数随分解过程的持续而呈波动递减的趋势，优势度指数则呈现出波动递增的趋势．野青茅分解部位对土壤动物类群数和多样性指数有极显著影响（P〈0．01），对丰富度指数影响显著（P〈0．05）；分解部位和月份的交互作用对土壤动物的个体数和多样性特征影响均不显著（P〉0．05），但对类群数影响显著（P〈0．05）．气温和降水显著影响根系和叶的分解，并对多样性指数、丰富度指数产生显著影响，与优势度指数存在负相关关系．本研究结果表明，野青茅根系分解过程中土壤动物参与的类群和数量均较叶高，水热条件是影响根系和叶分解过程中土壤动物群落差异的主要因素．（图2表3参29）This study aimed to assess community characteristics of the soil fauna associated with the roots of Deyeuxia arundinacea, as well as with its decomposing litter. Litter bags were used to study the characteristics of the soil fauna from August 2013 to July 2014. In root decomposition bags, 1 321 individual animals belonging to 37 groups of the soil fauna were found, and 958 individuals of 25 groups were found in litter decomposition bags. The decomposing roots had a fauna containing higher numbers of individuals and more groups in each month than that in the litter decomposition bags. The community diversity indices showed the same trends, although the Shannon, Pielou, and Margalef indices decreased as time passed, while the Simpson＇s index increased with time. Different parts of Deyeuxia arundinacea had different effects on the number of individuals and group~ in the soil fauna. The effects of the interaction between different parts of Deyeuxia arundinacea and month on individual density and biodiversity were non-significant （P 〉 0.05）, but this interaction did significantly affect the number of groups （P 〈 0.05）. A positive correlation was found between both the average temperature and the average rainfall and the number of groups in the soil fauna associated with decomposing roots. A positive correlation was also found between the average temperature and the density of the soil fauna, and between the average temperature and average rainfall with the Shannon and Margalef index values, respectively. A negative correlation was found between both the average temperature and average rainfall and Simpson＇s index values. These results indicated that the highest numbers of individuals and groups occurred during the root decomposition process, and that the structure and diversity of the soil fauna community associated with Deyeuxia arundinacea are influenced by hydrographic conditions.

关 键 词：野青茅 凋落物分解 土壤动物 群落特征 

分 类 号：S154.5[农业科学—土壤学]