定西市陇川乡玉米地地膜残留调查与评价

Investigation and Evaluation of Plastic Film Residue in Corn Field of Longchuan Town in Dingxi City

[目的]地膜覆盖技术已成为广泛应用的农艺技术之一，但同时地膜残留污染也成为影响我国农业生产的主要问题。了解地膜残留现状对于合理利用该技术具有重要意义。[方法]选取甘肃定西市陇川乡为研究对象，采用咨询当地农民与典型样点采集的方法，对当地种植玉米地区的地膜残留状况进行调查与评价。[结果]该地区回收地膜以人工捡拾为主，0～20 cm土壤农用地膜残留量为6．45 kg／hm2。根据土壤地膜残留标准，该地区残留等级属于一级标准，残留量较小，尚未造成严重后果。[结论]结合当地特征，给出适合治理当地玉米地膜残留的措施。减小地膜的残留。

[Objective] Plastic film mulching is one of wildly used agricultural technologies,but the plastic film pollution has been a serious issue for agricultural production in China. It is important to understand the current situation of plastic film residue for using this technology properly. [Method] The methods of questioning to local farmer and typical sample collection were adopted to find out the present situation of film use and film residue in the corn field of Longchuan Town,Tongwei County of Dingxi City in Gansu Province. [Result] The hand picking was the main way of recycling,and the weight of film residue in the soil of 0- 20 cm was 6. 45 kg / hm2. According to the soil film residue standard,this area belonged to the level one,residue was less,and it hadn＇t caused serious consequences. [Conclusion] According to the characteristics of the local area,the study supplied proper method for disposing local plastic film residue to reduce the residue of film.