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Association Between Association Between DOM Composition Characteristics and CH, Emission of Chinese Milk Vetch Amended Under Different Water Management

文献类型： 外文期刊

作者： Han, Liu 1 ; Ma, Ting-ting 1 ; Wan, Li 1 ; Chen, Xiao-fen 1 ; Zhou, Guo-peng 3 ; Sun, Jin-xin 3 ; Zhu, An-fan 4 ; Ll, Yan-li 2 ; Liu, Jia 1 ;

作者机构： 1.Minist Agr & Rural Affairs, Soil & Fertilizer & Resources & Environm Inst, Jiangxi Acad Agr Sci Natl Engn, Natl Engn & Technol Res Ctr Red Soil Improvement,K, Nanchang 330200, Peoples R China

2.Yangtze Univ, Coll Agr, Jingzhou 434025, Peoples R China

3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China

4.Agr Technol Promot Ctr Jiangxi Prov, Nanchang 330046, Peoples R China

关键词： Green manner; Flooding after a short time delay; Methane; Dissolved organic matter; Three-dimensional excitation emission matrices; Parallel factor analysis

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.8； 五年影响因子：0.7 ）

ISSN： 1000-0593

年卷期： 2024 年 44 卷 12 期

页码：

收录情况： SCI

摘要： In order to study the relationship between the composition and structure of dissolved organic matter (DOM) and methane (CHL) emissions in the paddy soil with Chinese milk vetch returning under different water managements (flooding after a short time delay), we set an incubation experiment, with no green manure and no tillage (DW-0) as control. different water management treatments (immediately flooding, flooding after 5 and 10 days) were set up, three dimensional fluorescence spectroscopy (3DEEM) and parallel factor analysis (PARAFAC) were used to assess the effects of soil DOM composition and the effect of fluorescence spectra on CH, emissions. The results showed that both DOM content and cumulative CH, emissions significantly decreased under GDW-5 treatment, and both DOM content and cumulative CH, emissions increased with the extension of dry tillage time. Three fluorescence components, including fulvic-like (CI), humic like (C2), and protein-like. (C3), were obtained by the 3DEEM PARAFAC method, There were significant differences in the fluorescence components of soil DOM under different water management practices. The highest content of humus like components (C1-C2) was found in soil DOM under the GDW-5 treatment, which reached 79.88%, and the restricted principal component analysis indicated that soil DOM components were significantly different under different water management. The DOM Humification Index (HIX) of GDW-5 was 5. 11. significantly higher than other treatments. The correlation analysis showed that CH. emissions were negatively correlated with the CI and HIX index but positively correlated with the C2 and BIX index, the results showed that flooding after a short time delay could reduce CH, emissions by increasing the content of Cl and the level of soil DOM humification, Overall, the composition and structure of DOM in the paddy soil under different water managements are closely related to CH, emissions, which could provide a scientific basis for reducing CH, emissions from paddy soil.

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