Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15326 |
Light grazing facilitates carbon accumulation in subsoil in Chinese grasslands: A meta‐analysis | |
Zhi‐; Yun Jiang; Zhong‐; Min Hu; Derrick Y. F. Lai; Dao‐; Rui Han; Mei Wang; Min Liu; Meng Zhang; Ming‐; Yan Guo | |
2020-10-04 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | Grazing by livestock greatly affects the soil carbon (C) cycle in grassland ecosystems. However, the effects of grazing at different intensities and durations on the dynamics of soil C in its subsoil layers are not clearly understood. Here, we compiled data from 78 sites (in total 122 published studies) to examine the effects of varying grazing intensities and durations on soil C content at different depths for grasslands in China. Our meta‐analysis revealed that grazing led to an overall decrease in soil C content and productivity of above‐ground vegetation (e.g., above‐ground biomass and litter) but an increase in below‐ground biomass. Specifically, the effects of grazing on soil C content became less negative or even positive with increasing soil depths. An increase of soil C content was consequently found under light grazing (LG), although soil C content still decreased under moderate and heavy grazing. The increase in soil C content under LG could be largely attributed to the increase of soil C content in subsoil layers (>20 cm), despite that soil C content in surface soil layer (0–20 cm) decreased. Moreover, the magnitude of increase in soil C content under LG in subsoil layers increased with grazing duration. A possible reason of the increase in soil C content in the subsoil layers was due to the increases in below‐ground biomass. Our study highlights that LG may modify the allocation of C input and promote its accumulation in subsoil layers, thus offsetting the negative impact of grazing on surface soil C content, a finding that has significant implications for C sequestration in grasslands. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/297832 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Zhi‐,Yun Jiang,Zhong‐,等. Light grazing facilitates carbon accumulation in subsoil in Chinese grasslands: A meta‐analysis[J]. Global Change Biology,2020. |
APA | Zhi‐.,Yun Jiang.,Zhong‐.,Min Hu.,Derrick Y. F. Lai.,...&Yan Guo.(2020).Light grazing facilitates carbon accumulation in subsoil in Chinese grasslands: A meta‐analysis.Global Change Biology. |
MLA | Zhi‐,et al."Light grazing facilitates carbon accumulation in subsoil in Chinese grasslands: A meta‐analysis".Global Change Biology (2020). |
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