您好，欢迎访问浙江省农业科学院 机构知识库！
浙江省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Stability of soil organic matter accumulated under long-term use as a rice paddy

文献类型： 外文期刊

作者： Nakahara, Shiko 1 ; Zou, Ping 2 ; Ando, Ho 3 ; Fu, Jianrong 2 ; Cao, Zhihong 4 ; Nakamura, Toshio 5 ; Sugiura, Yuki 1 ; W 1 ;

作者机构： 1.Nagoya Univ, Grad Sch Bioagr Sci, Nagoya, Aichi 4648601, Japan

2.Zhejiang Acad Agr Sci, Hangzhou, Zhejiang, Peoples R China

3.Yamagata Univ, Fac Agr, Tsuruoka, Yamagata, Japan

4.Chinese Acad Sci, Inst Soil Sci, Nanjing, Jiangsu, Peoples R China

5.Nagoya Univ, Ctr Chronol Res, Nagoya, Aichi 4648601, Japan

关键词： Soil organic carbon/nitrogen in long-term use as an irrigated rice is analyzed;Chemical structure and biodegradability indicate no increase in stability;Enhanced accumulation of recently generated organic matter is suggested

期刊名称：JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES （ 影响因子：3.822； 五年影响因子：4.566 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： To understand the mechanism responsible for the enhanced accumulation of soil organic matter (SOM) under long-term use as a rice paddy, soil samples from the plow layer from 16 fields that have been used for irrigated rice production from5 to 2000 years in the Hangzhou Bay, China, were analyzed. The humin in silt/clay particles was isolated as a representative relatively stable SOMpool, and isotopic signatures (δ13C, δ15N, and 14C concentration), 13C nuclear magnetic resonance (NMR) spectra, and biodegradability in an incubation were examined. The amounts of C and N in the bulk soil, silt/clay, and silt/clay-humin increased with increasing period of use as a rice paddy within the east and west zones, respectively. The degree of humification determined for humic acids indicated that the progression of humification did not contribute to the accumulation of C beyond 100 years. The δ15N of silt/clay-humin suggested an increase in organic N derived from chemical fertilizer or recent biological fixation with increasing amount of this fraction. The 14C concentration showed a negative correlation with the amount of silt/clay-humin C. The structural property with regard to 13C NMR spectra and biodegradability of the silt/clay-humin remained constant with the length of use as a rice paddy or 14C concentration. These results suggest that the larger C or N accumulation in the soils with a longer rice paddy history can be attributed to an enhancement in the accumulation of recently generated SOM rather than the stable accumulation of humus over the years.

  • 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：浙江省农业科学院

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