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| Effects of strip composting for corn straw combined with livestock manure on soil active organic carbon |
| Received:January 08, 2021 |
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| KeyWord:straw strip composting;livestock manure;active soil organic carbon;soil carbon pool management index |
| Author Name | Affiliation | E-mail | | LI Hu | College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China | | | WU Jinggui | College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China | wujingguiok@163.com | | LI Jianming | College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China | |
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| Abstract: |
| To evaluate the effects of applying straw strip in-situ composting in agricultural production, the effects on the distribution of soil active organic carbon in straw in-situ strip composting in the field combined with the application of different livestock and poultry manures were determined. The black soils in the agricultural science and technology demonstration park in Fanjiatun, Jilin Province, were used as experimental objects. Corn stalks were used as the test material to conduct field in-situ composting experiments, where the treatments under study included conventional straw return to the field(CK), straw strip return(ST), straw strip + pig manure(STP), and straw strip + chicken manure(STC). Soil organic carbon(SOC), soil microbial biomass carbon(MBC), soil dissolved organic carbon(DOC), and soil easily oxidizable organic carbon(EOC) were measured. Moreover, the content of each component of activated organic carbon was analyzed, and the carbon pool management index(CPMI) was calculated. The results showed that the contents of SOC, MBC, DOC, and EOC in the treatments with strip straw composting were all higher than those of the CK treatment. Among the treatments, the strip straw treatments combined with livestock and poultry manure were more effective in increasing the content of active carbon components compared with that of the CK. Correlation analysis also showed there was a significant positive correlation between SOC, DOC, EOC, and CPMI in the stripstraw-composted soil, whereas these parameters had a highly significant negative correlation with the oxidation stability coefficient(Kos). The strip straw composting method of returning straw to the field effectively increased the content of SOC, MBC, DOC, and EOC in the soil. Chicken manure was more conducive to increasing soil organic carbon content, whereas the treatments with straw combined with livestock and poultry manure were more effective in increasing the soil active organic carbon content, increasing the CPMI, and reducing Kos. The findings of this study reveal that the straw in-situ strip composting method combined with the application of different livestock and poultry manures has a positive effect on improving the quality of the black soil carbon pool. |
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