Abstract: The experimental study on maize mulched with the plastic film was conducted in the East Areas of Jilin Province to determine the ecological effects,such as water and thermal effects.The results showed that the plastic mulching could rise the soil temperature by 3～5℃ and increase the accumulated temperature by about 180℃ in fine day,while the soil moisture content increased by 2～4%.The soil temperature and moisture increase was not significant in overcast and rainy day.The soil moisture content under the plastic mulching condition in heavy rainy days was significant lower than that without plastic mulching.The soil water and thermal conditions could be improved by the plastic mulching.The growth and development of maize were improved as well.

Key words: Plastic mulching, Plastic mulching, Maize, Jilin Province, Ecological effect