1. 黑龙江省黑土保护利用研究院，黑龙江省土壤环境与植物营养重点实验室，黑龙江 哈尔滨 150086
2. 中国农业科学院农业资源与农业区划研究所，北京 100081
3. Department of Biosystems Engineering (BIOSE)，Gembloux Agro-Bio Tech of Université de Liège, Jean Bru, Belgium
4. 黑龙江省农业科学院佳木斯分院，黑龙江 佳木斯 154007
Analysis of DOC Component Structure of Black Soil Profile With Straw Deeply Bried and Based on Fluorescence Spectrum
KUANG En-jun1, 2, 3, CHI Feng-qin1, ZHANG Jiu-ming1, XU Ming-gang2*, Gilles Colinet3, SU Qing-rui1, HAO Xiao-yu1, ZHU Bao-guo4
1. Heilongjiang Academy of Black Soil Conservation & Utilization, The Key Laboratory of Soil Environment and Plant Nutrition of Heilongjiang Province, Harbin 150086，China
2. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081，China
3. Department of Biosystems Engineering (BIOSE), Gembloux Agro-Bio Tech of Université de Liège, Jean Bru, Belgium
4. Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences，Jiamusi 154007, China
Abstract：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~T4 treatments were humus like components (Ex/Em=250~275/455 nm) and tryptophan like components (Ex/Em=225~237/340~350 nm), while T5 treatment was humus-like components (250~275/455 nm) and tyrosine like components (Ex/Em =225/304 nm), there were small authigenic components at a depth of 31~40 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
匡恩俊，迟凤琴，张久明，徐明岗，Gilles Colinet，宿庆瑞，郝小雨，朱宝国. 基于荧光光谱分析秸秆深埋还田黑土剖面DOC组分结构变化特征[J]. 光谱学与光谱分析, 2022, 42(10): 3243-3248.
KUANG En-jun, CHI Feng-qin, ZHANG Jiu-ming, XU Ming-gang, Gilles Colinet, SU Qing-rui, HAO Xiao-yu, ZHU Bao-guo. Analysis of DOC Component Structure of Black Soil Profile With Straw Deeply Bried and Based on Fluorescence Spectrum. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(10): 3243-3248.
