您好，欢迎访问中国农业科学院 机构知识库！

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Spring rest-grazing time affected soil organic carbon stability and storage in subalpine meadows of Carex

文献类型： 外文期刊

作者： Jing, Yuanyuan 1 ; Xiao, Hong 1 ; Xu, Changlin 1 ; Wang, Lin 1 ; Chen, Yanzhu 1 ; Liu, Yuanyuan 1 ; Yu, Xiaojun 1 ;

作者机构： 1.Grassland Sci Coll Gansu Agr Univ, Sino US Res Ctr Sustainable Grassland & Livestock, Grassland Ecosyst Key Lab, Minist Educ, Lanzhou 730070, Peoples R China

2.Chinese Acad Agr Sci, Grassland Res Inst, Hohhot 010010, Peoples R China

3.Gansu Agr Univ, 1 Yingmen Village, Lanzhou 730070, Gansu, Peoples R China

关键词： Carex subalpine meadow; Rest-grazing; Re-greening; Soil thawing; Soil organic carbon

期刊名称：ECOLOGICAL ENGINEERING （ 影响因子：3.8； 五年影响因子：4.3 ）

ISSN： 0925-8574

年卷期： 2024 年 201 卷

页码：

收录情况： SCI

摘要： Scientific grazing management is essential to maintain soil organic carbon (SOC) stability in subalpine meadows on the Qinghai -Tibet Plateau (QTP). We studied the stability of SOC in Carex subalpine meadows in QTP with five rest -grazing treatments. (ST1: soil surfaces started thawing; ST2: soil thawing depth > 10 cm; RG1: regreening coverage reached 30-40%; RG2: re -greening coverage reached 80%; CK: local traditional restgrazing time). The results showed that rest -grazing at different times in spring affected the active SOC composition by affecting the stability of physical structure. The underground organic carbon storage was dominated by the root carbon storage, while the active organic carbon component had a significant correlation with the litter content. Compared with the traditional rest -grazing, ST1, ST2, RG1 and RG2 increased the topsoil SOC storage by 5.87%, 7.24%, 13.55%, 2.17%, and the topsoil root carbon storage by 32.77%, 36.25%, 9.91%, -0.79%. Restgrazing at ST1 promoted the production of soil macro -aggregates, increased the hydrolase activity and active SOC contents in topsoil, and promoted the soil nutrient cycling. Continuing grazing after the plant re -green increased the physical structure stability and oxidase activity but decreased the active SOC and SOC storage. Although a late rest -grazing in spring has increased the SOC stability, it reduced soil carbon use efficiency and sequestration. It is necessary to rest -grazing subalpine QTP Carex meadows before soil thaw, which can promote SOC accumulation and nutrient cycling, and transport plant carbon into the deep soil through roots, which is beneficial for grassland productivity and grassland carbon sequestration.

  • 相关文献
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：中国农业科学院

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