Slope of Nitrogen Loss in the Rocky Mountain Area of Parrot Ditch Under the Condition of Rainfall Simulation

This article through the wild simulating rainfall,researching different type of land using of slope surface runoff and the loss of nitrogen in the shed soil.The results show that: Total nitrogen average is more than 10 mg/L in the process of rainfall runoff plots-surface runoff.Along with the increase of the rainfall duration,total nitrogen loss presents a more steady state,with a less overall change range.Concentration output of nitrate nitrogen has a good correlation with total nitrogen,is the main form of nitrogen loss;under the condition of the heavy rain,farmland of nitrogen loss in shed soil are less than the naked slope,half in the total nitrogen.In the other two kinds of rainfall intensity conditions,nitrogen loss of farmland soil area except totall nitrogen are less than naked slope in shed soil;the nitrogen loss in shed soil has a larger proportion in the runoff,specially nitrate nitrogen,the content of nitrate nitrogen is 9.09~11.42 mg/L in shed soil,and the largest proportion is 61.4%.