黑土区免耕秸秆不同覆盖频率下大型土壤动物群落结构特征

发布时间：2018-10-20 17:09

【摘要】：为探讨免耕玉米秸秆不同覆盖频率下大型土壤动物群落组成、结构和季节变化,于2015年4、7和10月,在中国科学院吉林省梨树县保护性耕作试验基地,对免耕玉米秸秆不同覆盖频率各样地进行大型土壤动物群落调查。结果获得大型土壤动物26类,隶属2门5纲13目,线蚓为优势类群,不同类群在各处理样地所占数量比例存在差异。免耕秸秆不同覆盖频率样地大型土壤动物个体密度、类群丰富度和多样性指数均高于常规耕作样地。各处理样地大型土壤动物群落个体密度的最高值均出现在10月,类群数量和多样性则以7月最高。不同土壤动物类群对免耕秸秆覆盖频率增加的响应存在差异。相对常规耕作,免耕秸秆覆盖频率的增加可显著提高腐食性类群密度。
[Abstract]:In order to study the community composition, structure and seasonal variation of macrofauna under different mulching frequency of no-tillage maize straw, the experiment site of conservation tillage in Lishu County, Jilin Province, Chinese Academy of Sciences, was established in April and October 2015. Soil macrofauna community was investigated in different mulching frequency of no-tillage corn straw. Results 26 species of macrofauna, belonging to 2 phylum, 5 classes, 13 orders, were obtained. The individual density, group richness and diversity index of macrofauna in no-tillage straws with different mulching frequency were higher than those in conventional tillage plots. The maximum individual density of soil macrofauna community in all treatment plots appeared in October, and the number and diversity of taxa was highest in July. The responses of different soil animal groups to the increasing frequency of no-tillage straw mulch were different. Compared with conventional tillage, the increase of straw mulching frequency in no-tillage could significantly increase the density of scavenging groups.
【作者单位】：吉林师范大学生态环境研究所;中国科学院沈阳应用生态研究所;
【基金】：国家自然科学基金项目(41401283) 吉林省重点科技成果转化项目(20140307034NY) 吉林省科技厅发展计划项目(20160520080JH) 吉林省教育厅“十三五”科学技术研究项目(吉教科合字[2016]第224号)资助
【分类号】：S154.5

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