Study On Regional Distribution Of Plastic Film Covered Planting And Residual Membrane Pollution Prevention And Control Strategies In Xinjiang

Xinjiang is one of the important cotton and grain producing areas in China.The spatial and temporal distribution of agricultural land resources is one of the causes of a series of ecological and environmental problems.The planting and mulching structure of crops in xinjiang not only indicates the expansion of planting and mulching scale of crops in xinjiang,but also refers to the planting pattern of different crops in xinjiang.Therefore,in the first part of this paper use about 75%of the proportion of crops in xinjiang three crops（grain,cotton,oil）statistical data of planting area in xinjiang uygur autonomous region and xinjiang production and construction corps planting area of statistical data,and effect of planting statistical data of the xinjiang uygur autonomous region and xinjiang production and construction corps planting laminating statistics,from based on spatial and temporal variations of crop planting structure and effect of planting structure analysis and research for the development and utilization of land resources in xinjiang to provide scientific data to support.In the second part,the meihua point method was used to sample the residual film pollution in xinjiang,and the characteristics of residual film pollution in xinjiang were statistically analyzed by simple random sampling method,and the prevention and control strategies of residual film pollution in xinjiang were formulated.In terms of crop planting,the share of cotton planting area in xinjiang has remained basically unchanged in terms of the spatial and temporal changes of cotton planting in xinjiang in the past 16 years,but the actual planting area has increased from 1.1×10⁶hm²in 2001 to 2.1×10⁶hm²in 2016.The increase of cotton planting scale in xinjiang mainly lies in the impact of global warming,continuous application of film mulching technology,full mechanization of cotton planting,market demand and other factors,and the continuous concentration of cotton planting in aksu area and kashgar area,the advantageous areas of cotton planting in xinjiang.From xinjiang food crop spatial and temporal variations of sixteen years,can be found that the actual cultivation of food crops in xinjiang area is in a state of greater volatility,and food crops for water resources and irrigation facilities dependence degree is higher,because the water resources are extremely uneven distribution in xinjiang,therefore xinjiang food crop spatial distribution has a bigger difference;From the spatial and temporal changes of oil crops in xinjiang in the past 16 years,it can be found that the main producing area of oil crops in xinjiang is located in the northern region where the temperature is lower.In terms of plastic mulch planting,the plastic mulch planting area in xinjiang is in a state of continuous growth,and the increase in the plastic mulch planting area and the amount of plastic mulch input is much higher than the national level.However,in the past 16 years,the increase rate of mulch input in xinjiang was lower than that of mulch planting area.Therefore,the coverage rate of mulch in xinjiang mulch planting area may be in a declining state.Separately,both the proportion of mulching area and the proportion of mulching input are dominated by xinjiang uygur autonomous region,which is the focus of mulching.With the passing of time,the center of gravity of mulch planting in xinjiang was further tilted,and it was transferred from xinjiang production and construction corps to xinjiang uygur autonomous region.According to the sampling survey of residual membrane pollution in various regions of xinjiang,bortala Mongol autonomous prefecture has the most serious residual membrane pollution,reaching327.37kg/hm²,and only yili and hetian regions have residual membrane pollution below 200kg/hm².However,in xinjiang production and construction corps,the 8th division has the most serious residual film pollution,reaching 337.36kg/hm^2.The 14th division has the lowest residual film pollution,and the residual film is 70kg/hm².After analyzing the sampled data,it was found that the residual film pollution was greatly affected by the number of years covered with film,soil type,type of crops covered with film,operating depth of recycling machinery and other factors.To formulate the prevention and control strategy of residual film pollution,first of all,starting from the selection of plastic mulch,the different types of plastic mulch planting crops were planned.Secondly,it is necessary to standardize the rules for the use of plastic mulch,determine the focus of residual film pollution treatment,and plan the recovery method of residual film in multi-pollution grade farmland for comprehensive treatment.At last,we should carry out residual film treatment in various aspects,implement and implement subsidy for residual film recovery,establish and improve supervision mechanism,and promote the development of ecological chain of residual film recovery and utilization.