| The experiment was carried out to study the effect of film mulch during the whole growth period of corn on the ground temperature and the production on dryland in Weiyuan County.It was shown that the application of plastic film could raise the ground temperature,adjust the economic characters,and increase the yield of corn obviously.By analyzing,it was concluded that temperature was the key factor influencing the growth of corn in this area,and the application of plastic film was the main measure to raise temperature.Compared with the control(bare land),the application of plastic film could raise the 0~5 cm ground temperature by 2.4~3.6℃/d and the yield of corn by 3 300.1~3 650.2 kg/km2, and the increasing rate of production was 66.7%~89.0%. |