Effects of different irrigation patterns on mineralization of organic manure carbon and contents of soil labile organic matter.

By determining the mineralization rate of organic carbon and the contents of soil active organic matter,the effects of different irrigation patterns on accumulation-mineralization of organic carbon and the correlation of organic matter and labile organic matter were studed.The results showed that within 90 days,the mineralization rates of organic carbon in furrow irrigation were 42.94%～47.19%,in drip irrigation were 48.51%～53.54%,in subsurface irrigation were 42.04%～45.77%,the order were drip irrigationfurrow irrigationSubsurface irrigation.The trends of labile organic matter were different with irrigation patterns and application rates of organic manure.The change trends of active organic matter in drip irrigation treatment was similar with subsurface irrigation treatment.The impact of irrigation patterns and the application amount of organic manure on contents of labile organic matter were significant difference,and there were interactions between the irrigation patterns and the application amounts of organic manure.