您好，欢迎访问江苏省农业科学院 机构知识库！
江苏省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Changes in soil microbial biomass and community structure with addition of contrasting types of plant litter in a semiarid grassland ecosystem

文献类型： 外文期刊

作者： Jin, Hongmei 1 ; Sun, Osbert Jianxin 1 ; Liu, Jianfeng 3 ;

作者机构： 1.Beijing Forestry Univ, Coll Forest Sci, MOE Key Lab Silviculture & Conservat, Beijing 100083, Peoples R China

2.Beijing Forestry Univ, Inst Forestry & Climate Change Res, Beijing 100083, Peoples R China

3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

5.Chinese Acad Forestry, Inst Forestry, Beijing 100091, Peoples R China

关键词： belowground process;decomposition;plant litter;microbial community;priming effect;semiarid grassland

期刊名称：JOURNAL OF PLANT ECOLOGY （ 影响因子：1.774； 五年影响因子：2.547 ）

ISSN： 1752-9921

年卷期： 2010 年 3 卷 3 期

页码：

收录情况： SCI

摘要： Aims Elevated atmospheric CO2 has the potential to enhance the net primary productivity of terrestrial ecosystems. However, the role of soil microorganisms on soil C cycling following this increased available C remains ambiguous. This study was conducted to determine how quality and quantity of plant litter inputs would affect soil microorganisms and consequently C turnover. Methods Soil microbial biomass and community structure, bacterial community-level physiological profile, and CO2 emission caused by different substrate C decomposition were investigated using techniques of biological measurements, chemical and stable C isotope analysis, and BIOLOG-ECO microplates in a semiarid grassland ecosystem of northern China in 2006 and 2007 by mixing three contrasting types of plant materials, C-3 shoot litter (SC3), C-3 root litter (RC3), and C-4 shoot litter (SC4), into the 10- to 20-cm soil layer at rates equivalent to 0 (C-0), 60 (C-60), 120 (C-120) and 240 g C m(-2) (C-240). Important Findings Litter addition significantly enriched soil microbial biomass C and N and resulted in changes in microbial structure. Principal component analysis of microbial structure clearly differentiated among zero addition, C-3-plant-derived litter, and C-4-plant-derived litter and among shoot- and root-derived litter of C-3 plants; soil microorganisms mainly utilized carbohydrates without litter addition, carboxylic acids with C-3-plant-derived litter addition and amino acids with C-4-plant-derived litter addition. We also detected stimulated decomposition of older substrate with C-4-plant-derived litter inputs. Our results show that both quality and quantity of belowground litter are involved in affecting soil microbial community structure in semiarid grassland ecosystem.

  • 相关文献

[1]Chemical properties and microbial responses to biochar and compost amendments in the soil under continuous watermelon cropping. Cao, Yun,Ma, Yan,Guo, Dejie,Wang, Qiujun,Wang, Guangfei.

[2]Responses of periphyton morphology, structure, and function to extreme nutrient loading. Lu, Haiying,Feng, Yanfang,Yang, Linzhang,Lu, Haiying,Feng, Yanfang,Wu, Yonghong,Yang, Linzhang,Lu, Haiying,Shao, Hongbo,Wang, Jinhua.

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江苏省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台