Changes of Organic Matter in Soils Planted Lei Bamboo with Different Years

It is important to understand soil organic matter status in Lei bamboo with a large organic material input.In this study,soil samples from Lei bamboo field with different planting times were collected.Through 13C NMR analysis and a decomposition incubation experiment,the composition and stability of soil organic matter were discussed.Results showed that soil organic matter content decreased in the early stage when the paddy field shifted to Lei bamboo.However,the content of soil organic matter increased greatly after the field using the organic material mulching technique.The increased part of soil organic matter accounted 23.8% for the input.NMR and decomposition results suggested the stability of increased organic matter was high,indicating that soil organic matter could be stabilized in Lei bamboo field with the intensive management and it is useful for carbon fixation.