Research On The Laws Of Nitrogen And Phosphorus Loss And Control Scheme In Eryuan Rural

In recen years,the water quality of Erhai Lake declining With the basin population growth and rapid economic development.And eutrophication problem has become more apparent. Rural and agricultural non-point source pollution is a major cause of eutrophication of Lake Erhai.According to the monitoring data,over 70%nitrogen and phosphorus pollution load into the Erhai lakei come from rural and agricultural non-point source pollution.Llivestock manure nitrogen and phosphorus loss cause the greatest contribution to the pollution load. Therefore this paper mainly research for the nitrogen and phosphorus loss from the following aspects:1.Survey the basic situation of breeding industry in Erhai Lake and large-scale farms were located by GPS equipment. Draw the distribution picture of pollutants by using Arc-Gis software baised on these datas which have calculated,and analysis solid waste pollution sources in these areas.2.Now the mainly reason of the loss of nitrogen and phosphorus pollution is livestock manure are stack at random and lack of effective control measures.In the rainy season and non-rainy season, nitrogen and phosphorus. respectively,loss through rainfall erosion and infiltration.Up to about 60%nitrogen and phosphorus content in livestock can loss.Studied the ways and laws of nitrogen and phosphorus loss by monitoring piled points and simulated rainfall experimental,and proposed the control measure of reduce the risk of loss.3.For the utilization rate of household composting pool is very low, conducted research of using worm degradation dairy manure. Added the worms of ohira-2 during composting.lt not only degradation dairy manure,but also generate economic benefits, it can improve the utilization rate of household composting pool.So it has a good effect in control the loss of nitrogen and phosphorus.4.Evaluation of control effect of existing projects.According to the control requirements, Proposed control scheme,the rate of solid waste to 80%in the northern region of Erhai Lake.