Abstract: The yield formation and the water consumption characteristics of winter wheat under micro-irrigation were studied with flooding irrigation as control in combined irrigation area of well and canal. The purpose is to provide technical support for the application of water saving technology in this area. 4 micro-irrigation treatment(the water amount were 90,135,180,225 mm respectively) and 1 flood irrigation control treatment were set. The result showed that the highest grain yield and spike number was get when the irrigation amount was 180 mm,and grain number per spike and grain weight were also higher in this irrigation amount. The irrigation amount was maximum for flood irrigation treatment,but the yield had no advantage. The water consumption amount increased with the increasing of irrigation amount,especially when the irrigation amount more than 135 mm the water consumption amount increased rapidly,while the water use efficiency decreased obviously when the irrigation amount more than 180 mm. The higher leaf area index could be obtained when the irrigation amount was 180 mm,and the crop growth rate was faster and the dry matter accumulation was higher in this irrigation amount. Higher leaf SPAD value was not get under less or more irrigation amount,while the keeping green time for leaf was longer when irrigation amount in the range of 135 mm to 180 mm. So the micro-irrigation amount should be controlled in less than 180 mm in this year type. Compared with the flood control,the grain yield was higher,and irrigation water amount and water consumption amount were decreased by 148 mm and 123 mm,respectively,and WUE increased substantially within the 180 mm irrigation amount.

Key words: Wheat, Micro-irrigation, Grain yield, Water use efficiency

CLC Number: 

• S365