文献类型： 外文期刊

作者： Li Yu-mei ¹ ; Wang Gen-lin ² ; Li Cheng-yang ¹ ; Liu Zheng-yu ⁴ ; Meng Xiang-hai ⁵ ; Wang Wei ¹ ; Shao Guang-zhong ⁵ ; Hu ¹ ;

作者机构： 1.Heilongjiang Acad Agr Sci, Inst Soil Fertil & Environm Resources, Harbin 150086, Peoples R China

2.Heilongjiang Acad Agr Sci, Inst Anim Sci, Harbin 150086, Peoples R China

3.Northeast Agr Univ Biol Sci, Harbin 150021, Peoples R China

4.Heilongjiang SuiBin Farm, Suibin 154213, Peoples R China

5.Heilongjiang Acad Agr Sci, Mudanjiang Branch, Mudanjiang 157041, Peoples R China

关键词： Land meadows; Straw returning; Tillage; WSOC

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： 2020 年 40 卷 4 期

页码：

收录情况： SCI

摘要： To study the effect of straw returning on composition of soil water-soluble carbon, the fluorescence spectral characteristics of WSOCwith depth were researched onland meadows with continuous no tillage, shallow turning, deep turning and no till cover, shallow and deep straw returning methods, and the results showed that the WSOC was all resolved two types of three fluorescent components in 0 similar to 50 cm soil layer with 3 kinds of tillage and corresponding straw returning, namely humus-like components Cl (240/400 nm) and C2 (245, 400/465 nm) and protein-like component C3 (220, 275/325 nm). Regardless of shallow or deep returning, the sequence was C1>C2>C3 in 0 similar to 20 cm topsoil, butthe change of C3 composition in 20 similar to 30 cm soil layer was negatively correlated with Cl and C2 components. It was also founded that the content of C3 component in 30 similar to 50 cm soil layer was increased with continuous straw returning. Fluorescence index analysis showed that the WSOC composition is a mixture of non-biological sources and biological sources, which indicated that the heterogeneous characteristics of the soil layer was obvious in 10 similar to 20 cm soil. For the reason of no disturbance to the soil in whole growing season with no-tillage and no-tillage straw cover, the self-generated characteristics in 20 similar to 50 cm soil layer was much strong. The ratio of C2/C1 in the 40 similar to 50 cm soil layer of straw deep returning was higher than that of shallow tillage and straw cover, indicating that thetenth of humus production and accumulation would be increased.