The effect of the first heavy rainfall event on soil and nitrogen losses in different slope gradient newploughed fields
In this paper,the characteristics of soil and nitrogen losses at the first heavy rainfall event after were studied.The results indicated that soil and nitrogen concentration in runoff varied with different treatments,significant relationships between losses and slope gradient were found; Sediment nitrogen and total dissoluble nitrogen (TDN) losses were almost equal,accounted for approximately 40％ of total losses,nitrate nitrogen (NH3 - - N) was the dominated species,reached more than 60％.Compared to large slope gradient fallow surface coverage and farmer activities have distinct effect on soil and nitrogen losses.Thereupon,it is very important to select reasonable planting structure and farming time for soil and nutrients conversion in Three Gorges Reservoir Area (TGRA).
Heavy rainfall slope gradient newploughed field soil losses nitrogen losses
Feng minglei Lin shah Yang qian Hu ronggui
College of Resources and Environment, Huazhong Agricultural University, Hubeu P.R. China, 430070
国内会议
武汉
英文
1489-1494
2009-11-01（万方平台首次上网日期，不代表论文的发表时间）