您好，欢迎访问中国热带农业科学院 机构知识库！
中国热带农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Tracing controls of autotrophic and heterotrophic nitrification in terrestrial soils

文献类型： 外文期刊

作者： Gao, Wenlong 1 ; Chen, Miao 1 ; Xu, Xingliang 6 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Hainan Key Lab Trop Ecocircular Agr, Haikou 571101, Peoples R China

2.Hainan Danzhou Trop Agro Ecosyst Natl Observat & R, Danzhou 571737, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Low Carbon Green Agr Trop China, Beijing, Peoples R China

4.Guangdong Acad Sci, Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Integrated Agro Environm Pollut, Guangzhou 510650, Peoples R China

5.Natl Reg Joint Engn Res Ctr Soil Pollut Control &, Guangzhou 510650, Peoples R China

6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China

关键词： Autotrophic nitrification; Heterotrophic nitrification; N mineralization; Soil pH; Soil C; N ratio

期刊名称：EUROPEAN JOURNAL OF SOIL BIOLOGY （ 影响因子：3.232； 五年影响因子：4.009 ）

ISSN： 1164-5563

年卷期： 2022 年 110 卷

页码：

收录情况： SCI

摘要： The major mechanisms and drivers of autotrophic (O-NH4) and heterotrophic (O-Nrec) nitrification in terrestrial soils are still not well understood. A synthetic analysis of the factors influencing ONH4 and ONrec in cropland, forest, and grassland soils was thus conducted to establish an evidence-based prediction after compiling data from 71 reports. This synthesis applied single-factor regression approach to highlight major relationships, with variable importance measures provided using random forest (RF) models. Empirical evidence suggests that N mineralization (M-tot) modulates O-NH4 fluxes in croplands and grasslands. pH has more of an effect than M-tot on O-NH4 fluxes in acidic cropland and forest soils. Fungal biomass can be predictive of O-Nrec fluxes in strongly acidic forest soils. The ratio of heterotrophic to gross nitrification (R-hn) might increase with forest soil C:N ratios. RF models revealed that soil C:N ratio, soil N (TN), O-NH4, M-tot and N mineralization-immobilization turnover (MIT) are important regulators of O-Nrec fluxes in forests. pH is a significant factor affecting Rhn in forest soils. However, its influence is less than that of soil C:N ratio, TN and M-tot. There is little control from soil C-N status (e.g., TN and soil C:N ratio), microbial C-N status (e.g., M-tot and MIT), and soil pH status over ONrec and Rhn in croplands and grasslands. In summary, this study advances our understanding of determinants to ONH4 and ONrec in various soil habitats. It highlights that acidity-based mechanisms outweigh substrate-based mechanisms in mediating ONH4 in acidic cropland and forest soils. Soil and microbial N status are central to heterotrophic nitrifying activities in forest ecosystems.

  • 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：中国热带农业科学院

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