Abstract: In order to clarify the influence of biodegradable film with different colors on the growth and development of pepper （Capsicum frutescens L.） in the alpine region of Hubei Province, field experiments were conducted to analyze the warming effect, degradation performance and pepper yield of white and black fully biodegradable film by setting up no film, white polyethylene film and black polyethylene film as controls. The results showed that the early growth stage of pepper （12~33 d after film mulching） was the main period of warming, and the film mulching mainly increased the temperature of the 5 cm soil layer during this period. The warming effect of fully biodegradable film was similar to that of polyethylene film, and the warming effect of white film was better than that of black film. The induction period of fully biodegradable film was 40~54 d, and the degradation rate of white biodegradable film was faster than that of black biodegradable film, which was not conducive to inhibiting the growth of weeds. Fully biodegradable film did not change the peak of pepper production, mainly increasing the yield of pepper from the 5th to 8th picking period. Considering factors such as insulation, weed suppression and yield, it was recommended to use 0.01 mm black fully biodegradable film made of PBAT and PLA for pepper cultivation in the alpine region of Hubei Province.

Key words: fully biodegradable film, warming effect, pepper （Capsicum frutescens L.）, yield