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| The Effect of Fertilizer Management Practices on Distribution of Aggregates and SOC |
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| KeyWord:cinnamon soil; aggregate stability; MWD; GMD; organic carbon |
| Author Name | Affiliation | | LIU Zhen-dong | Institute of Agricultural Resources and Regional Planning,CAAS, Beijing 100081, China | | LI Gui-chun | Institute of Environment and Sustainable Development in Agriculture, CAAS, Beijing 100081, China | | ZHOU Ying | Institute of Agricultural Resources and Regional Planning,CAAS, Beijing 100081, China | | YANG Xiao-mei | Institute of Agricultural Resources and Regional Planning,CAAS, Beijing 100081, China | | YIN Chang-bin | Institute of Agricultural Resources and Regional Planning,CAAS, Beijing 100081, China | | Fujio Nagumo | Japan International Research Center for Agricultural Sciences, JIRCAS, Japan |
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| Abstract: |
| The research is about influences of aggregate size distribution and stability and soil organic carbon protective mechanism in cinnamon soil in organic and chemical fertilizer management practices. Soil samples ,which were collected from Xushui station long-term positioning experiment field in Hebei Province, includes 6 treatments：chemical fertilizer（N10）, four fertilizer management practices which combinated chemical fertilizer with manure, CK. The aggregate size classes were got by dry sieving methods. The results indicated that N10 didn′t significantly increase the capacity of organic carbon in soil, Organic fertilizer could significantly improve the R0.25 and organic carbon content in large-aggregate. The treat of M3N7 can significantly improve MWD, GMD and organic carbon content in all levels of aggregates, showing the significance of organic fertilizer on forming and maintaining soil aggregates. Organic carbon are mainly distributed in the 2~0.25 mm aggregate size classes and organic carbon content in CK treatment of micro-aggregate is highest. That the formation and stability of micro-aggregate is earlier than large-aggregate, verified the mechanism of large-aggregate forming from micro-aggregate through the cementation. The cinnamon soil aggregate-organic carbon interaction is the key factor that the large-aggregate stability and forming with stratification mechanism, which protect the organic carbon. |
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