您好，欢迎访问湖北省农业科学院 机构知识库！
湖北省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Patterns and determinants of nitrification and denitrification potentials across 24 rice paddy soils in subtropical China

文献类型： 外文期刊

作者： Wang, Jun 1 ; Lv, Lu 2 ; Hu, Ronggui 2 ; Ma, Haiyang 3 ; Liu, Bo 4 ; Zhang, Wenju 1 ; Wu, Lei 1 ;

作者机构： 1.Chinese Acad Agr Sci CAAS, Key Lab Arable Land Qual Monitoring & Evaluat, Minist Agr & Rural Affairs, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China

2.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China

3.Chinese Acad Trop Agr Sci CATAS, South Subtrop Crops Res Inst, Key Lab Trop Crops Nutr Hainan Prov, Zhanjiang 524091, Guangdong, Peoples R China

4.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Wuhan 430064, Hubei, Peoples R China

5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, 12 South Rd, Beijing 100081, Peoples R China

关键词： Nitrification; Denitrification; Paddy soil; Iron and manganese oxides

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 2022影响因子：6.6； 五年影响因子：6.7 ）

ISSN： 0167-8809

年卷期： 2024 年 361 卷

页码：

收录情况： SCI

摘要： Nitrification and denitrification processes are major pathways for nitrogen (N) losses in agricultural soils, and highly depend on soil properties. Improved understanding of soil nitrification and denitrification processes is essential for better N management in agroecosystems. However, the effects of geochemical properties on nitrification and denitrification potentials remain largely uncertain, especially in paddy soils. Here, we investigated the patterns and controlling factors of nitrification and denitrification potentials across 24 paddy soil sampling sites (varied in soil texture, pH, and contents of soil organic carbon (SOC), nutrients, and exchangeable metals) in major rice-producing areas of Hubei Province, China. The results showed substantial variations in the potential rates of nitrification (0.46-17.65 mg N kg- 1 soil d-1) and denitrification (6.31-18.12 mg N kg- 1 soil d-1) across the paddy soil sampling sites. Soil pH and SOC were the predominant factors regulating nitrification and denitrification potentials, respectively. Nitrification potential strongly increased with soil pH at value above 6.2, while showed an insignificant correlation with pH at value below 6.2. Increased soil pH stimulated nitrification potential via enhanced NH4+ availability, likely due to increased soil active iron (Fe) and manganese (Mn) oxides facilitating chemisorption. Denitrification potential strongly positively correlated with SOC at value below 15 g kg- 1, dissolved organic carbon and nitrate contents, but had little relationship with active Fe and Mn properties and clay contents. The potentials of nitrification uncoupled with denitrification, possibly resulting from their distinct controlling factors across the paddy soils. Overall, these findings could help improve the understanding of the key factors controlling potential nitrification and denitrification across paddy soils, and provide a theoretical basis for optimizing agricultural management to mitigate N losses.

  • 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：湖北省农业科学院

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