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就目前国内、外农膜种类来看，大致分为地膜和椰膜两大类。其发展方向基本为降解和提高强度。前者主要是减少对环境的白色污染，后者则是延长使用时间，相对地减少对环境的污染。与此同时，国外发展了带色膜（以蓝色为主），其目的是增加膜对阳光的散射作用和改变光质。我们针
On the current domestic and foreign types of plastic sheeting, broadly divided into two categories of plastic film and coconut film. The basic direction of its development is to degrade and increase its strength. The former is mainly to reduce the white pollution of the environment, the latter is to extend the use of time, the relative reduction of environmental pollution. At the same time, foreign developed a color film (blue-based), its purpose is to increase the scattering of sunlight on the film and change the quality of light. We needle