您好，欢迎访问宁夏农林科学院 机构知识库！
宁夏农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Litter quality modifies soil organic carbon mineralization in an ecological restoration area

文献类型： 外文期刊

作者： Li, Yunfei 1 ; Wang, Zhanjun 3 ; Shi, Wanli 4 ; Yang, Haotian 1 ;

作者机构： 1.Northwest Inst Ecoenvironm & Resources, Chinese Acad Sci, Shapotou Desert Res & Expt Stn, Lanzhou, Peoples R China

2.Univ Chinese Acad Sci, Beijing, Peoples R China

3.Ningxia Acad Agr & Forestry Sci, Inst Desertificat Control, Yinchuan, Peoples R China

4.Gansu Agr Univ, Coll Forestry, Lanzhou, Peoples R China

5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Desert Res & Expt Stn, Lanzhou 730000, Peoples R China

关键词： litter addition; moisture sensitivity; priming effect; SOC mineralization; temperature sensitivity

期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.7； 五年影响因子：5.0 ）

ISSN： 1085-3278

年卷期： 2023 年 34 卷 6 期

页码：

收录情况： SCI

摘要： Soil organic carbon (SOC) mineralization impacts the loss and accumulation of carbon (C) in crucial ways. However, it is still unclear how exactly litter quality regulates the SOC mineralization process and SOC stock. We conducted a laboratory incubation experiment under different temperatures, that is 10 degrees C, 20 degrees C, 30 degrees C, and 40 degrees C, and moisture, that is 5%, 10%, and 20% regimes, as well as a control (CK), and different litter qualities, that is, Artemisia ordosica, Caragana korshinskii, and Eragrostis minor. This was conducted in soil from a revegetated area in the Tengger Desert, northern China. We investigated the impacts of litter addition on SOC mineralization by considering the chemical properties of litter, temperature, and soil moisture, as well as the cumulative CO2-C emissions (CCE), maximum rate (MR), potential mineralizable C (C-0), priming effect (PE), temperature sensitivity (Q(10)), moisture sensitivity (MS), and SOC stock. Litter addition increased the CCE, MR, C-0, and MS but decreased the Q(10), and the effects of different litter qualities on CCE, MR, C-0, MS, and Q(10) differed significantly. The SOC mineralization rate increased with increasing temperature and moisture and was also accelerated by the interactions between temperature and moisture. The total C and lignin contents of litter were the key factors that governed SOC mineralization. Litter addition had a positive PE on SOC mineralization, and high-quality litter with low C:N ratio (A. ordosica and C. korshinskii) increased the PE compared with low-quality litter with high C:N ratio (E. minor). The PE also decreased with increasing temperature and moisture. Litter addition resulted in an acceleration of the loss of SOC mineralization, and an increase in the SOC mineralization response toward moisture but reduced the SOC mineralization response toward temperature, whereas litter quality was inversely correlated with the SOC stock. Therefore, the input of low-quality litter will decrease the loss of mineralized SOC caused by PE and diminish the accumulation of SOC in the revegetated regions. These findings may provide a reasonable litter management model to promote the stability of soil C pool in arid revegetated areas.

  • 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：宁夏农林科学院

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