Nitrogen Release During Litter Decomposition and in Rubber Plantations

In this study,both the rate and the content and release of nitrogen during decomposition for branches and leaves in rubber plantation were analyzed.The results showed that: 1)the weight lost from the decomposition in the year of 47.37% and 94.44% for branches and leaves,respectively,which mainly occurred during the period from June to October and from January to June;2)the nitrogen content varied yearly during the decomposition,which was increased for branches and decreased for leaves;3)there were different changes of nitrogen release rate between branches and leaves,that it mainly appeared the net nitrogen release for leaves in one year and the most rate with 41.50% in May,while,the average nitrogen enrichment rate with 12.25% for branches was more than that for leaves with 2.75%;4)the nitrogen release during litter decomposition in rubber plantation was gradually increasing with the age of the growth,in addition,the maximum emission of nitrogen appeared in May and enrichment in April.