Analysis of DOC Component Structure of Black Soil Profile With Straw Deeply Bried and Based on Fluorescence Spectrum

文献类型： 外文期刊

第一作者： Kuang En-jun

作者： Kuang En-jun;Chi Feng-qin;Zhang Jiu-Ming;Su Qing-rui;Hao Xiao-yu;Kuang En-jun;Xu Ming-gang;Kuang En-jun;Colinet, Gilles;Zhu Bao-guo

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关键词： Straw return; Soil depth; Soil dissolved organic carbon; Three-dimensional fluorescence; PARAFAC analysis

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.609； 五年影响因子：0.516 ）

ISSN： 1000-0593

年卷期： 2022 年 42 卷 10 期

页码：

收录情况： SCI

摘要： Taking black soil as the research object, the difference in the three-dimensional fluorescence spectrum of soil dissolved organic carbon (DOC) after returning maize straw to the field at different soil depths (0-2, 3-10, 11-20, 21-30 and 31-40 cm) were analyzed. The change characteristics of humification degree of maize straw return to deep soil were discussed. The results showed that straw return could increase the content of soil DOC. The characteristics of three-dimensional fluorescence spectra showed that there were two kinds of fluorescence components of soil DOC. CK similar to T4 treatments were humus like components (Ex/Em = 250 similar to 275/455 nm) and tryptophan like components (Ex/Em= 225 similar to 237/340 similar to 350 nm), while T5 treatment was humus-like components (250 similar to 275/455 nm) and tyrosine like components (Ex/Em =225/304 nm) there were small authigenic components at a depth of 31 similar to 40 cm, and the humification coefficient was the highest. The fluorescence intensity of soil DOC component C1 increased with the deepening of straw returning depth, while the C2 component showed a fluctuating state, and the fluorescence intensity increased first and then decreased. Soil DOC was affected by both endogenous and exogenous sources (FI>1. 4, 0. 6

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