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Xinjiang is located in the depths of the inland, abundant light and heat resources, climatic conditions suitable for the growth of cotton, cotton-growing industry has become a the irreplaceable pillar industry in Xinjiang is an important source of farmers' income, the importance of national economic and social development of the total one of the indicators. Xinjiang in recent years vigorously develop the cotton-growing industry, and the plastic film as an important agricultural production has long been widely used in cotton cultivation, and promote the further development of the cotton industry, improve the level of local economic development, but long-term use of plastic film plastic film resulting residues in the soil gradually increased, causing the plastic film residual pollution problems. Residual plastic film not only changed the physical and chemical properties of agricultural soils, and the growth and development of cotton plants, farming operation, the ecological environment had a negative impact. Only a comprehensive understanding of the pollution status of the of cotton fields mulch residues, the objective grasp the plastic film residual pollution factors accurately predict the cotton fields mulch residues accumulation, actively looking for solutions to solve the plastic film residual contamination, in order to promote faster and better cotton farming the fast and steady development, and promote the sustainable development of Xinjiang green ecological agriculture. The content of this study include: census of pollution sources by 2008, Xinjiang agricultural sources of pollution in the cotton fields of plastic film residual contamination status of the investigation, analysis the cotton fields mulch residual contamination status and hazards. The results showed that, the mulch residues in Xinjiang more polluted the mulch residues of different crops have different cotton fields mulch average residual of about 90 kg / ha. The mulch residues of hazardous presence of four aspects, the destruction of physical and chemical properties of soil, breaking the balance of the ecological environment, the economic side effects, visual pollution. And residual certain spatial characteristics, First, mulch duration, the recovery of plastic film and plastic film residue contamination. Cotton field mulch longer, more residues in the soil; mechanization of the recovery measures, affecting the distribution of the residual plastic film, plastic film residue is concentrated in the tillage layer. Second, Cotton Soil the mulch residue has regular distribution mulch residue was distributed in about 10 cm of the soil, 20 to 30 cm residue mulch distribution of a small number of 30 cm below the soil virtually no distribution of plastic film residue. Again, the form of cotton fields mulch diversification, the main area of 4 cm to 25 cm. Accumulation of plastic film residual area of plantings, mulch use, but the most important thing is closely related with the use of time, based on the relationship between two variables, by constructing a regression model, more reasonable and scientific projections out to 2008 basis points, after five years, 10 years, 15 years, 20 years of plastic film residue of about 186.03 kg / ha, 284.90 kg / ha, 406.59 kg / ha, 551.11 kg / ha for future mulch residual pollution prevention to provide a more accurate data, thereby promoting the rational allocation of the government's macro-control and market demand.
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