Impact of Synergistic Fertilizer on the Flurorescence Characteristics of Soil Fulvic Acid Based on the Flurorescence Spectroscopy Technique

文献类型： 外文期刊

第一作者： Hu Yu

作者： Hu Yu;Wei Dan;Li Yan;Bai Yang;Wei Dan;Jin Liang;Wang Wei;Cai Shan-shan

作者机构：

关键词： Synergistic fertilizer; Fulvic acid; Three-dimensional fluorescence spectrum; Humification; Parallel factor analysis

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.589； 五年影响因子：0.504 ）

ISSN： 1000-0593

年卷期： 2021 年 41 卷 5 期

页码：

收录情况： SCI

摘要： To elucidate the effect of synergistic fertilizers amendment on the flurorescence characteristics and humification degree of fulvic acid in soil, field trials were conducted in Nenjiang county and Aihui district of Heihe city, respectively. Totally, there were five treatments: (1) balanced fertilization (NE); (2) 25% reduction in balanced fertilization (CK), (3) 25% reduction in balanced fertilization combined with nano-carbon synergist (Ti), (4) 25% reduction in balanced fertilization combined with zeolite synergist (T2); (5) 25% reduction in balanced fertilization combined with biochar synergist (T3). Three-dimensional fluorescence region interal (FRI) method was used to determine the change of relative F-max content among treatments. The application of synergistic fertilizers greatly improved the soil humification degree and exhibited the following pattern: T2>T1>T3>NE>CK. T2 treatment showed the highest soil humification degree and nutrient-supply capability. Especially, the ratio of relative content of the visible fluorescent FA region V and ultraviolet fluorescent FA region III (P-v,P- (n)/P-III,P- n) in T2 treatment was improved by 5. 81% in Nenjiang county, and was improved by 4. 65% in Aihui District as compared with CK. Soil FA was divided into Cl and C2 component using the parallel factor analysis. The F-max ratio of C2 to Cl component in T2 treatment was improved by 22. 09% in Nenjiang County, while was improved by 20. 93% in Aihui District as compared with CK. The C2 component exhibited more complex structure and higher condensation than Cl component. The application of synergistic fertilizers improved the proportion of C2 component in FA and exhibited the following pattern: NE> T2> Ti > T3 > CK, indicating enhanced soil nutrient-supply capabilities by synergistic fertilizers. Overall, this study indicated that the T2 treatment significantly enhanced soil humification degree as compared with CK, and its positive effect on soil FA was superior to nano-carbon and biochar synergists. Therefore, the application of zeolite synergist would effectively improve soil nutrient-supply capability and ameliorate soil ecological conditions.

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