随着地膜覆盖栽培年限的延长，由于残膜回收率低，土壤中残膜量逐步增加，造成地膜污染。
Along with mulching fixed number years lengthening, because of remains film recovery rate is low, the amount of remains film in the soil progressively increase and cause film pollution.
在城市郊区，以收获青鲜荚供作菜用的，可提倡地膜覆盖栽培，以利提早上市，增加经济效益。
In the suburbs, harvesting fresh pods as a vegetable, the way of ground plastic cover culture would make it earlier for market with good economic benefits.
随着科学技术的进步，实施地膜覆盖栽培，使传统的栽培技术有了新的突破，生产水平明显提高。
With progress of scientific technology, film cultivation broke through traditional cultivation skill, obviously increased production level.
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