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

Spatial heterogeneous granulation enhance soil nitrogen supply potential via regulating dissolved organic nitrogen

文献类型： 外文期刊

作者： Yang, Xinyi 1 ; Zhu, Kun 1 ; Jia, Xiaohong 1 ; Li, Bo 2 ; Li, Guitong 1 ; Zhao, Xiaorong 1 ; Lin, Qimei 1 ; Fan, Changhua 4 ;

作者机构： 1.China Agr Univ, Coll Land Sci & Technol, Dept Soil & Water Sci, 2 West Rd Yuanmingyuan, Beijing 100193, Peoples R China

2.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China

3.Beijing Soil & Fertilizer Extens Serv Ctr, 6 Yumin Zhong Rd, Beijing 100029, Peoples R China

4.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China

关键词： Spatial heterogeneous granulation; N transformation; Soil N supply; SEM

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 746 卷

页码：

收录情况： SCI

摘要： Combined application of organic fertilizer (OF) and chemical nitrogen (N) fertilizer (CF) is a common fertilization practice, providing better N supply pattern for crop growth. However, few studies focused on the effect of granulation method of these two fertilizers on N supply to soil. To validate this effect, we mixed the CF (N-15-(NH4) 2SO4) into cow manure powders with maize straw powder at rate of 2% or 8% (dry weight), respectively, in two forms, homogeneous granulation (HG) and spatial heterogeneous granulation (SG), and applied them to soil to investigate their difference in N transformations during an 80-day incubation. Results showed that there were more NH4+, NO3- and microbial biomass N (MBN) in the SG granules and the surrounding soil, while more dissolved organic N (DON) in the HG granules and the corresponding soil after day 30. At day 80, compared to HG, SG released less CF-N into the surrounding soil, but primed more organic N into mineral N. Structural equation model (SEM) revealed that DON was the main form of N transported from fertilizer granules to the surrounding soil, and then drove the changes of soil microbial activity, which determined the amount and dynamic of mineral N in the surrounding soil. These results indicated that, in heterogeneous granulation, the spatial separation between OF and CF slow down, but more importantly enhanced up, the microbial transformation of CF in the granules. This demonstrated that the spatial heterogeneous granulation of OF and CF could change the pattern of N release from fertilizer to soil and offer a potential way to optimize N fertilizer management strategies in the future. (C) 2020 Elsevier B.V. All rights reserved.

  • 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