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| Effect of straw and aluminum sulfate on soil organic-mineral complex and organic carbon distribution in light Chernozem |
| Received:November 21, 2016 |
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| KeyWord:light Chernozem;straw;aluminum sulfate;organic-mineral complex;soil organic carbon |
| Author Name | Affiliation | E-mail | | ZHAO Xing-min | College of Resource and Environment, Jilin Agricultural University, Key Laboratory of Sustainable Utilization of Soil Resources in the Commodity Grain Bases in Jilin Province, Changchun 130118, China | | | LIU Nan | College of Resource and Environment, Jilin Agricultural University, Key Laboratory of Sustainable Utilization of Soil Resources in the Commodity Grain Bases in Jilin Province, Changchun 130118, China | | | GUO Xin-xin | Faculty of Engineering and Green Technology, University Tunku Abdul Rahman, Kampar 31900, Malaysia | | | WANG Hong-bin | College of Resource and Environment, Jilin Agricultural University, Key Laboratory of Sustainable Utilization of Soil Resources in the Commodity Grain Bases in Jilin Province, Changchun 130118, China | | | SUI Biao | College of Resource and Environment, Jilin Agricultural University, Key Laboratory of Sustainable Utilization of Soil Resources in the Commodity Grain Bases in Jilin Province, Changchun 130118, China | | | ZHAO Lan-po | College of Resource and Environment, Jilin Agricultural University, Key Laboratory of Sustainable Utilization of Soil Resources in the Commodity Grain Bases in Jilin Province, Changchun 130118, China | zhaolanpo12@163.Com |
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| Abstract: |
| The typical light Chernozem in Jilin Province was selected for analyzing the distribution of soil organic-mineral complex and the content of organic carbon at different content levels of straw and aluminum sulfate. Furthermore, the contribution of soil organic-mineral complex to organic matter sequestration in light Chernozem was investigated via laboratory simulative incubation. The results showed that the order of organic-mineral complex content was G1 (sodium dispersion group) > G0 (water dispersion group) > G2 (sodium and abrasive dispersion group) for all treatments with straw and aluminum sulfate addition. Compared with S0Al0, the content of G0 organic-mineral complex was decreased with straw and aluminum sulfate addition. The content of G2 organic-mineral complex was increased significantly. However, straw and aluminum sulfate addition had little effect on the content of G1 organic-mineral complex. The organic carbon content in the organic-mineral complex of unit mass followed the order of G2 > G0 > G1. The organic carbon content in the G2 complex was highest and the average content was 95.92 g·kg-1, which was about three times the organic carbon content in the G0 and G1 complex.The organic carbon content in the G0 complex was slightly higher than that of the G1 complex (the average content was 32.25 g·kg-1) and the average content was 33.89 g·kg-1. Straw and aluminum sulfate addition could increase the organic carbon content in the G0 complex, and the change of organic carbon content in the G1 complex was mainly affected by straw addition. With the straw amount increasing, the organic carbon content in the G1 complex was increased. Straw addition played a positive role for increasing the organic carbon content in the G2 complex, however, the effect of aluminum sulfate was the contrary. The contribution of each organic-mineral complex to the soil carbon sequestration in light Chernozem depended on the organic carbon content in the complex and the complex content in soil. The organic carbon sequestration content in each organic-mineral complex followed the order of G1 > G0 > G2. The contribution ratio of organic-mineral complex (G0+G1+G2) to organic carbon sequestration in the light Chernozem was 61.96%~73.56%. |
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