The Effects of Straw Mulching on Soil Moisture Dynamic Change and the Maize Yield

[Objective] In order to study the straw mulching for water-saving production problems in Heilongjiang Province of the Songnen Plain area. [Method] Based on the field measured data,the soil moisture content,maize growth and soil water use efficiency under different conditions of straw mulching were analyzed. [Result]The soil moisture content under the conditions of straw mulching was higher than no cover processing as a whole. Among them,under the straw mulching quantity of 10 t / hm2,the soil moisture content was highest in 0 ~ 40 cm soil layer,the soil water retention ability was the strongest. Under the straw mulching conditions,the growth of corn shape was better than no cover processing,reflected a strong advantage. At the same time,under the straw mulching quantity of 10 t / hm2,the crop yield and soil water use efficiency was the highest. [Conclusion]The study provided theoretical basis for science for straw mulching technology in Songnen Plain region.