Study On Phosphorus And Nitrogen Environment-behavior In Keriya River Basin

Ecological environment is effected by multi factors of the natural factor and human activities, especially the human activities. In the arid region which is consisted of the oases unit the human activity suppose to be focused on. With the increasing of the population , the irrigation area is increasing rapidly. This has made influence of the farming activities to oasis environment become more serious. In recent 50 years the increasing use of fertilizer and pesticide have made the study on them become more and more important.In this paper, we sampled soil, river water and seepage and we analyzed TP ( total phosphorus), TN(total Nitrogen), EC(conductivity), TDS, salt and pH of samples in the Lab. According to the data , the distribution character of TP, TN in each environment and its changing character are analyzed .And we also analyzed the impact between each index. Meanwhile the pollution degree of the environment is evaluated and the counter measures are expounded.The result shows that : The TP, TN amount bring forward the increasing tendency along with the river' s streamline, the highest appears in the oasis area where the irrigation land just end. And the synthesis index which is the result of the factor analysis show the same character. The TP, TN of seepage water don' t show any regulation, but after we divided the whole sampling area to 4 parts according to their layout and we calculated each parts synthesis index , the result shows that the synthesis index is very low in the oasis' upside and it begin to increase in downside .Because of the lacking of seepage water samples , the regulation character we get can' t be confirmed. The comparison between the field soil and un-field soil shows that in the whole sampling area , 66.67%-77.78% of field soil component of TP, TN is...