Abstract:

The research on the residual and recovery of mulch film with different thickness was summarized based on the existing research literatures, and the selection of mulch film was discussed to provide references for the coordinated development of agricultural production and environmental protection. The results showed that residual of different thickness films varied from crop to crop, the thicker the mulch film, the lower the residual amount. After reaching a certain thickness, the difference of residual amount was not significant, but after a certain thickness, the residual amount increased due to the increase residual quality per unit area. The use of thick mulch film could effectively improve the film recyclability, but the difference of recovery rate was not significant after the film reached a certain thickness. Mechanized recycling was the trend in the future, in addition to film strength, the influence of film thickness should draw more attention. In agricultural production, the selection of thin or thick film was both inappropriate, the thickness recommended by most scholars was between 0.008 and 0.012 mm, the specific effect between the film cover and the ecological benefit should be considered.

Key words: Plastic Film, Thickness, Residual, Recyclability, Coverage Benefit, Ecological Benefit, Selection