Abstract
In a sustainable agriculture farming systems experiment, the dynamics of soil organic carbon (OC), carbon/nitrogen (C/N) ratio and labile organic carbon pool in soil amended with maize stalk (MS), rice straw (RS) and alfalfa (AF) were studied from August 2005 to August 2006. The results showed that organic material with low N content decomposed slowly, while that with absolutely high N content depressed decomposition rate. After one year’s decomposition, the humification process of organic materials was basically complete. Soil labile carbon content was dramatically improved compared with the control after the addition of organic materials to the soil. The leached DOC was highly correlated with micro-organisms activity and MBC was highly dependent on N incorporation.
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