Analysis On Pollution Situation Of Cotton Mulch Residual In Soil And The Prediction Of Its Development Trend In Xinjiang Province

Xinjiang province is located in China's inland; sunlight is sufficient which Suitable is for cotton growing. So cotton planting industry is an irreplaceable industry; a way of keeping farmers incoming in Xinjiang and one of the important indexes of measuring the national economic and social development.Recently cotton planting industry develops quickly in Xinjiang, but in order to promote economic level and the output of cotton, mulch has been widely applied in cotton planting. Because of long-time using mulch, many adverse consequences exposed. More and more pollution problems were increased by the residual mulch. The residual mulch not only changed the physical and chemical properties of soil and the growth of cotton plant but also districted agricultural operations and ecological environment, etc.Only Comprehensive understands the pollution status of cotton mulch residues; Masters the pollution factors; predicts the productions of mulch residues of cotton accurately and looking for the way of solving the residue actively, we can keep cotton planting fast and steady development and promote the green ecological agriculture sustainable development.Through the data of the census in 2008, the agricultural pollution situation of residual mulch was analyzed, Results showed that: the pollution of mulch is relatively serious in Xinjiang. Different crops has discrepancy to mulch residual, the average was 90 kg/hm2 for cotton mulch residual. It is mainly for four aspects: destructed physical and chemical properties of soil; break the balance of ecological environment. And the mulch has its certain characteristics, first, there is a relationship between the time of using recycled plastic residue way and pollution. The more use of cotton mulch, the longer residual in soil. Second, the soil with residual cotton plastic mulch, the residual distribution regularity of distribution in soil obviously about 10 cm, 20～30 cm residual film has samller, soil under general 30cm essentially no residual distribution of film. The morphological diversity, the aeras of cotton films mostly distributing from 4～25cm.The accumulation of residue mulch has relationship with the area, but using of time is the most factors, according to the relation of the two variables, through regression model, reasonable and scientific prediction to 2008, after five years, ten years, fifteen years, twenty years, the plastic mulch would be 186.03 kg/hm2,284.90 kg/hm2,406.59 kg/hm2,551.11 kg/hm2, plastic mulch to the residual pollution prevention provide accurate reference data, so as to promote the government's macroeconomic regulation and market demand of reasonable configuration.