Abstract:

The composition and distribution characteristics of nitrogen from different paddy soil in the hilly area of the middle Sichuan basin was studied, and the correlation between nitrogen and organic was discussed. The results showed that the level of soil nitrogen content was still low, the content of soil total nitrogen (TN) and available nitrogen (AN) were (1.08±0.26)g/kg and (33.06±8.07)mg/kg, the content of ammonium nitrogen, ammonium nitrogen and amino sugar nitrogen were (30.39±15.08)mg/kg, (96.06±13.01)mg/kg and (16.77±11.30)mg/kg. The content of total nitrogen (TN), available nitrogen (AN) and organic nitrogen in different paddy soil was in the order of gleyed paddy soil > percogenic paddy soil > submergic paddy soil. The components of organic nitrogen in different paddy soil was ammonium nitrogen > ammonium nitrogen > amino sugar nitrogen. Moreover, soil total nitrogen was significantly correlated with soil organic matter (P<0.1).