Abstract:To study the mechanism of nitrate nitrogen loss along with runoff, through artificial simulated rainfall, the process of runoff and the characteristics of nitrate nitrogen loss were analysed on five degree red soil slope under rainfall intensities 65mm/h and 120mm/h separately. The results showed that the Boltzmann equation could be used to describe the relationships between the rainfall duration and the runoff discharge under two different rainfall intensities, and there was a highly significant positive linear correlation between the rainfall duration and the accumulated discharge. The changes of nitrate nitrogen concentration were similar under two different conditions and could be well fitted by cubic polynomial curve. The accumulated loss of nitrate nitrogen was positively and significantly correlated with the rainfall duration. There was a highly significant positive linear correlation between the accumulated discharge and the accumulated loss of nitrate nitrogen. The accumulated discharge of surface runoff was the dominant factor and played an important role in the amount of nitrate nitrogen loss under different rainfall intensities.
任秀文, 李开明, 刘爱萍, 姜国强. 模拟降雨条件下红壤坡面硝态氮流失特征研究[J]. 中国环境科学, 2013, 33(增刊): 119-124.
REN Xiu-Wen, LI Kai-Ming, LIU Ai-Ping, JIANG Guo-Qiang. Characteristics of Nitrate Nitrogen Loss on Red Soil Slope under Simulated Rainfall Conditions. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(增刊): 119-124.