News Time2016.06.02 News Sources Views
In recent years, our plastic film mulching has been used widely since plastic mulching technology great area is used in our country, which brings huge economic benefits to agricultural production, because it can keep moisture, improve the ground temperature, extend the crop growing period, promote crop growth and increase production. And it can also reduce the hail and other natural disasters like drought, sandstorm and temperature difference effectively. But waste plastic damage is severe, and the used waste plastic film haven’t timely recovered for many years. The deserted plastic increases the amount of waste plastic in soil. Their accumulation to a certain degree obviously hinders the growth of crops on the absorption of water. And the process of degradation of waste plastic will dissolve out toxic substances, impacting seriously on land quality and the quality of agricultural products. Film plastic materials are mainly composed of high polymer. Under natural conditions, these polymers are difficult to decompose. If it is not timely recycled, residual film in soil will be accumulated year by year. It will affect the permeability of soil for long period, and will also hinder the transport of soil fertilization. All of them will affect crop root growth, lead to crop failures and cause the pollution of farmland. Waste plastic films are heaped or blew to the side of the field, roads, vegetation and houses. Swirling films have bad effects on the earth, especially village, which is inharmonious with new rural construction. This pollution affects machinery operation seriously. The machine runs in disorder because working parts can’t operate flexibly, which will seriously affect the work quality. And it also causes inefficiency. Waste plastic films exposed to the surface of the residual film fragments and mixing with forage. The animals often eat them by mistake, so it does harm to livestock’s indigestion, growth, or even causes death. Thus, human survival is threatened by the residual film increasingly. So is crop growth. The key point to the sustainable development of plastic mulching cultivation relies on following steps: managing the residual film pollution and protecting the ecological farmland. The governance of white pollution is urgent. Enterprise plays a leading role, and farmers participate in the marketization. The government provides fiscal subsidy to the residual film recycling mechanism, establish effective market supervision mechanism, and actively encourage recycling plastic mulch enterprises. By the use of waste plastic films and establishment of core demonstration area, the government also actively carries out farmland mulch testing the effect of residual area, explores the solution to the soil governance mechanism of waste plastic films, along with the formulation of plastic recycling technology regulations. All these measures provide the reference for waste plastic recycling. At present, instead of recycling waste plastic films in China, most of them are treated mainly by landfill and incineration. This approach not wastes resources, also causes environment pollution. And it also causes serious damage to soil quality.
