Abstract:

In order to further explore the effect of whole film at different stages on maize production efficiency to water, four different ways during the film were chosen to test 0-100cm soil water content during the key growth period of maize researched the productivity of growth period water consumption, growth period of precipitation and annual precipitation. The results show that , 27.6% of soil moisture loss was reduced by plastic film mulching from the period of freeze-up in Winter to defrosting in Spring, and 16.0% by film mulching from if mulched film in Spring just before the thawing time and soil thawing to sowing the maize. Compared with plastic membrane covered on the just thawing soil, the water productivity of maize can increased by 9.27% by mulching soil with whole film in autumn. Production capacity is increased by 0.16kg yield per millimeter precipitation during the growing season. But Compared with mulched film just before the seedtime, mulched before the thawing raise 7.44% of productivity, and raise 0.13kg yield per millimeter precipitation during the growing season.