Study on Dynamics of Soil Water Content of Winter Wheat to Different Cropping patterns

[Objective] The research aimed to explore the soil water dynamics of winter wheat under different planting patterns in North China.[Method] With Jimai 20 of winter wheat as the materials and the flat-planting,covering flat-planting with straw mulching and covering bed-planting with flim mulching patterns as cropping patterns,the water changes of different soil depth in winter wheat fields were determined by neutron moisture meter.[Result] The results showed that the amount of soil water storage from 0-30 cm deep soil profile emerged W-type changes under three cropping patterns.The soil water content of different treatments after irrigation was the flat-planting covering bed-planting with flim mulchingstraw mulching.The soil water content from jointing stage to filling stage was straw mulchingcovering bed-planting with flim mulching the flat-planting.During the whole growth period of winter wheat,30-60 cm soil water content was straw mulchingthe flat-plantingcovering bed-planting with flim mulching,and 60-90 cm soil water content declined.[Conclusion] Straw and plastic film mulching had the good role of soil surface moisture,and 30-60 cm of soil moisture changed in larger.Rainfall and irrigation influenced the middle layer of soil moisture largely and didn't affect the lower soil moisture.The research provided the theoretical basis for the agriculture drought monitoring in North China.