Relations Of Circulation Agriculture Measure & Non-point Pollution Load In Chongqing

Since Chongqing's directly jurisdiction of the Central Government for 10 years, agricultural production has developed rapidly; rural life has improved a lot also. But the agricultural production and living of non-sustainable development and the high consumption still widely existed, this brought serious agricultural environment problem which was difficult to solve, one of the important factors which restricting development of agriculture circular economic was agricultural non-point source pollution in a relative long time. To control the non-point source pollution of agriculture, exerting different control on different area is the key, scilicet, we should divide the region into different parts according to main factors which influence agricultural Non-point source pollution and otherness and comparability of characteristics of regional agricultural Non-point source pollution. Proposed the new idea, which uses idea of circular agriculture to control agricultural non-point source pollution.The research which set 39 districts as research units except Yuzhong district in Chongqing has counted and analysed actuality of agricultural Non-point source pollution by establishing index system applying investigation and statistics. To establish "the pressure indicator system", "the response indicator system" of pollutants concentration in Chongqing and the evaluating indicator system of circulation-agriculture. Based on this, parsed the Non-point source pollution load in Chongqing. And analyzed the circulation agriculture measure by the modern mathematics method.Through to analysis discussion theThe development degree of circulatory-agriculture, The coordinating degree of circulatory-agriculture and The obstacle amounts of circulatory-agriculture in Chongqing, this paper has proposed a new idea of controlling countryside Non-point source pollution with circulatory-agriculture theory. It has also discussed about the development of circular economy, its basic theories and its function in controlling countryside non-point source of pollution. Deliberated the relations of circulation agriculture measure and the Non-point source pollution load in Chongqing. To establish 6 first-level indexes systems such as the production devotion degree of agriculture, the resource Using degree, the economy economy development degree, the ecosystem security degree, the environment quality degree and so on and 24 second-level indicator systems. Based on this,Through to analysis discussion the development degree of circulatory-agriculture, The coordinating degree of circulatory-agriculture and The obstacle amounts of circulatory-agriculture in Chongqing, we found that, the circulatory-agriculture of one hour economic cycle is best, the circulatory-agriculture of Northeast wing is middling, the circulatory-agriculture of southeast the wing is commonly.The amount of COD, BOD₅, TN, TP which are the Agricultural Non-point pollution in Chongqing, respectively, are 601300, 296200, 162200 and 32900 t/a, and the Standards are respectively 30500, 75400, 164400 and 167100t/a. The Agricultural non-point source pollution load has surpassed the urban industry and the domestic pollution load. The main City serious pollution, and the northeast and southeast are middle pollution.The concentration of COD, BOD₅, TN, and TP are respectively 20.72, 10.64, 5.58,1.27mg/L in Chongqing. TN, TP has achieved the serious pollution, BOD₅ achieves the milddle pollution, COD is demonstrated for the critical security level.The main agricultural Non-point pollution is TP and TN in Chongqing, the contribution rate, respectively, is 38.20% and 37.58%; the major pollution source is breed aquatics and fertilizer. The contribution rate, respectively, is 57.29% and 26.98%; the main effect factor is the total agricultural output value, and the contribution rate is above 99%.Based on soil pressure of sign absolute discharge and response of water pollution index , the serious region of the pollutants concentration in Chongqing are Shapingba area, the Dadukou area, the Yongchuan area, Rongchang County, Tongliang County, Bishan County, Dazu County and so on.Further research direction in future was pointed out at end of the paper, scilicet combining quantitative research of small watershed and model simulation, optimizing index and modifying parameter and then the reliability of analysis results could be improved.