| To understand the regulatory mechanism of plastic mulching for soil moisture and temperature as well as yields, soil moisture at 0～80 cm soil layer and soil temperature at 0～40 cm soil layer during the whole growth periods were respectively measured by oven drying and geothermometer methods. Plant height, plant weight, stem diameter, ear diameter, rows per ear, grains per row, kernels per spike, thousand kernel weight and leaf area per plant were randomly measured during the maturation period, and their economic yield and biological yield were calculated. The results showed that all-film double-furrow sowing could respectively improve 0.3%, 1.0%, 1.6% and 2.4% more of the soil moisture at 0～80 cm soil layer, elevate 0.3℃, 1.2℃, 1.6℃ and 2.2℃ higher of soil temperature at 0～40 cm soil layer, shorten 0, 3, 5 and 13 fewer days of growth periods, increase 679.5, 2 740.5, 3 376.5 kg·hm-2 and 4 861.5 kg·hm-2 more of biological yields, boost 424.5, 1 729.5, 2 032.5 kg·hm-2 and 2 971.5 kg·hm-2 more of economic yield than all-film mulch hole sowing, half-film mulch hole sowing, half-film mulch furrow sowing and outdoor sowing. Therefore, popularizing all-film double-furrow sowing could significantly increase corn yield, ensuring national food security. |