山东典型薯田中氧化生物双降解地膜残留特点研究

Study on Residual Characteristics of Oxo-biodegradable Plastic Film in Typical Potato Fields in Shandong Province

以山东省滕州市马铃薯产区作为研究对象,对连续应用氧化生物双降解地膜薯田地膜残留状况进行了分析研究。结果显示,连续覆膜4年的薯田中氧化生物双降解地膜残留量为19.92kg/hm^2,残膜片数为180.0万片/hm^2,分别较聚乙烯地膜减少51%和41%。残留双降解地膜主要集中在耕层中,0~10、10~20、20~30cm土层中的残膜数量分别占总量的58%、23%和19%,大幅减少了残膜在耕层底部的分布比例。研究结果还显示,氧化生物双降解地膜残留膜片面积明显减少,残膜破碎程度大幅增加,<4cm2、4~25cm2、>25cm2残膜片数分别占总量的44.0%、54.6%和1.4%。研究表明,应用氧化生物双降解地膜有效减少了地膜残留,有利于农业生产的可持续发展。

Taking the potato producing area of Tengzhou City in Shandong Province as the research object,the status of plastic film residues in potato fields with continuous application of oxo-biodegradable film was analyzed and studied.The results indicated that the amount of residual oxo-biodegradable plastic film in potato fields with 4 years of film-mulching were 19.92 kg per hectare and 1.8 million pieces per hectare,which were 51% and 41% lower than that of polythene film respectively.Most of residual oxo-biodegradable plastic film was distributed in topsoil,and the percentage of residual film in three layer of soil (0-10 cm,10-20 cm,20-30 cm) were 58%,23% and 19% respectively.And the distribution ratio of residual film in deep soil decreased significantly.Compared to polythene film,the average area of residual oxo-biodegradable plastic film decreased obviously,and the amout of residual film with different sizes were 44.0%(<4 cm 2),54.6%(4-25 cm 2) and 1.4%(>25 cm 2) respectively.The conclusion indicates that the application of oxo-biodegradable plastic films can effectively reduce the amount of residual film and promote the sustainable development of agriculture.