1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. College of Civil Engineering, Hexi University/Research Institute of Water Resources Protection and Utilization in Hexi Corridor, Zhangye, Gansu 734000, China
Abstract：Based on the seeded maize as the test material, the effects of the induction period of 2, 3 and 4 months white(WD1, WD2, WD3)and black(BD1, BD2, BD3)degradation film and ordinary white film cover on the soil moisture and yield of the seeded maize were studied. The results showed that the degradation grade of black degradation film was higher than that of white degradation film during the same induction period. The soil water storage was 2.2% to 7.5% and 2.3% to 7.0% lower than that of CK during grout and maturity, and the water storage level of BD2 soil during the spinning period was 8.0% higher than CK. The maximum daily soil temperature covered during extraction, spinning, grouting and maturation is 0.1 to 1.5, 0 to 1.2, 0.1 to 1.3 and 0.9 to 1.9 degrees Cel-sius lower than CK, the earlier the degradation diaphragm induction period. The greater the effect on ground temperature, the 3.2% higher the wet water content of the crown wet base during BD3 maturation than CK, and the yield and water utilization efficiency of different degradation film-covering crops compared with CK, BD3 had an increase in yield effect, yield and water utilization efficiency were 6.8% and 4.7% higher than CK, respectively. The results of the study are aimed at providing a theore-tical reference for the coverage of the ecological film of maize cultivated in Hexi area.
