您好，欢迎访问河北省农林科学院 机构知识库！
河北省农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Amino acid nitrogen trends in paddy soils under long-term rice cultivation in southeast coast of China

文献类型： 外文期刊

作者： Pan, Jinhua 1 ; Wang, Jin 1 ; Zhuang, Shunyao 1 ;

作者机构： 1.CAS Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

2.Hebei Acad Agr & Forestry Sci, Shijiazhuang Inst Fruit Trees, Shijiazhuang 050061, Hebei, Peoples R China

3.71 East Beijing Rd, Nanjing 210008, Peoples R China

关键词： Paddy management; Cultivation chronosequence; N sequestration; Enzyme activity; Soil properties

期刊名称：CATENA （ 影响因子：6.367； 五年影响因子：6.497 ）

ISSN： 0341-8162

年卷期： 2022 年 212 卷

页码：

收录情况： SCI

摘要： In China, tidal flats in some coastal areas have been converted into paddy fields. Such reclamation and prolonged rice cultivation activities could influence soil amino acid nitrogen (N) (AAN) contents and N cycling. However, the effects of long-term rice cultivation on the contents and proportions of AAN in paddy soils remain poorly understood. Paddy soil samples were collected in a chronosequence cultivated for 50 (P50), 100 (P100), 300 (P300), and 700 (P700) years to elucidate the responses of AAN to long-term rice cultivation. Soils from a neighboring tidal flat (T0) and salt marsh (10 years after diking, S10) used as controls. AAN, total amino acid (AA), and free amino acid (FAA) contents and proportions, as well as N-related enzyme activity and soil properties were analyzed. AAN content significantly (p < 0.05) increased from 0.12 g kg(-1)& nbsp;in T0 to 0.54 g kg(-1)& nbsp;in P300, then slightly decreased to 0.47 g kg(-1) in P700. The enantiomer L type-AA and L type-FAA contents were higher than D type-AA and D type-FAA contents in all soils. Urease and protease activities increased sharply within 100 years and then gradually declined, while urease activity remained steady over time. Regression analysis revealed linear relationships between AAN and pH, soil organic carbon, total N, microbial biomass carbon, microbial biomass N, and urease and protease activities. Overall, AAN was accumulated under long-term rice cultivation, and was closely linked to the soil properties. However, AAN accumulation was limited to 300 years, highlighting the potential effects of long-term rice cultivation on the stability of soil N cycling and sustainable N-use.

  • 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：河北省农林科学院

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