Regulatory effect of fully biodegradable plastic film on the growth and development of baby cabbage and soil physicochemical property

AN Yujin; LI Wende; WANG Xing

doi:10.16861/j.cnki.zggc.2025.0390

Abstract：To screen for fully biodegradable mulching films suitable for the production of baby cabbage in the Hexi re-gion,this study treated five types of fully biodegradable mulching films with PBAT,starch,PLA,PBAT+PLA,and PLA+starch as the main components,and used ordinary PE mulching film as the control.The study systematically evaluated their effects on the growth,development,photosynthetic characteristics,physiological indicators of baby cabbage,and the soil environment.The measured contents included dry matter accumulation of plants,chlorophyll content,antioxidant en-zyme(POD,SOD)activity,MDA content,and soil sucrase,urease,and catalase activity,as well as total nitrogen,total phosphorus,total potassium,and organic matter content.The results showed that the fully biodegradable mulch film made of PBAT+PLA significantly improved the growth and development of Chinese cabbage:Chlorophyll content increased by 162.96%,photosynthetic rate increased by 79.15%,POD and SOD activity were enhanced,MDA content decreased by 87.5%,and ultimately,the yield incrased by 10.40%compared to the PE control.This mulch film exhibited excellent deg-radation performance,with a 77.69%reduction in residual film.It also had a positive impact on the soil environment:Soil sucrase,urease,and catalase activity were increased by 2.21%,32.70%,and 7.35%,respectively,compared to the PE treat-ment;soil total nitrogen,total phosphorus,total potassium,and organic matter content were increased by 2.15%,10.75%,15.33%,and 15.14%,respectively.The fully biodegradable mulch film made of PBAT+PLA can enhance photosynthesis and stress resistance in baby cabbage,optimizing soil physicochemical properties and enzyme activity,achieving both yield increase and environmental protection..It is suitable for promotion and application in the Hexi re-gion.