Winter Wheat Root System Distribution under Different Soil Moisture Conditions

To explore the winter wheat root system under different soil moisture conditions for provide technical support for the refinement of farmland irrigation.Adopt the method of quantitative irrigation,fresh and dry root weight and its proportion of winter wheat in diffferent layers such as 0~10cm,10~15cm,20~30cm in several major growth periods.The results showed that the soil layer were 0~10cm,10~20cm,20~30cm,the dry root weight were over 80%,10%,5%of the total weight.Small panicle type variety shannong20in booting stage,root dry weight order were mild drought,excess moisture, drought and appropriate moisture.In flowering period root dry weight order were appropriate moisture,excess moisture,mild drought,appropriate moisture,drought.Root dry weight order of large panicle varieties shannong21in booting stage were appropriate moisture,excess moisture,mild drought,drought.Root dry weight order in flowering period were appropriate moisture,excess moisture,mild drought,drought.In the production of dryland tilalge,the small panicle type variety was priority, which had large root system,it can reduce drought disaster,while wheat production in the whole stages with twice irrigation was proposed.