四种可降解地膜降解特性的比较研究

Study on Degradation Characteristic of Four Degradable Plastic Films

通过对四种可降解地膜降解特性的比较,结果表明,在紫外光条件下,B-1#的地膜失重率明显大于其他几种地膜的失重率;电镜和红外光谱分析可得到:几种可降解地膜的表面和内部结构均受到了不同程度的破坏,说明可降解地膜的降解程度还受其诱导期的影响;在不同土壤的生物降解过程中,X-1#的地膜放出的CO2的累积量远远高于其他几种地膜;说明了X-1#的生物降解速率要高于其他几种可降解地膜。

The degradation characteristic of 4 mulching film was compared. The results showed that the weight loss rate of B - 1 # signif- icantly exceeded the others in the ultraviolet rays conditions. Electron microscopy and infrared spectroscopy analysis showed that de- gradable mulching film~ surface and internal structure damaged with the ultraviolet irradiation. It indicated that the degree of degradation were influenced by induction period. C02 released from X - 1 # was far more than the other films in the biological degradation process of different soil. It showed that the biodegradation rate of X - 1 # was the highest .