Abstract:Yield and water consumption are the reference of crop water-saving and high-yield cultivation.In this paper, the improved fuzzy comprehensive evaluation model was used to evaluate fuzzily and comprehensively the water consumption and yield of winter wheat from the 2 levels and 7 indicators of cropping patterns and irrigation treatments.The experiment, from October 2012 to June 2013, was conducted at water test site(34°51′ N, 113°49′ E) in Henan Province Key Laboratory of Water-saving Agriculture Farming, North China University of Water Conservancy and Electric Power.Two kinds of planting patterns were designed in the experiment, which were respectively the wide ridge planting pattern and conventional planting pattern.Meanwhile, 3 kinds of irrigation ways were designed for each planting pattern, which were respectively 60%, 70% and 80% of field moisture capacity.The yield and water consumption of winter wheat through field trials were studied using the method of fuzzy comprehensive evaluation.The results showed that the yields under the wide ridge planting pattern with 60%, 70% and 80% of field moisture capacity were respectively 6 352.97, 7 589.96 and 7 963.77 kg/hm2; and the water consumption amounts during the whole growth period were respectively 337.91, 398.24 and 443.59 mm.While the corresponding yields and water consumption amounts of conventional planting pattern were respectively 6 202.4, 7 352.33 and 7 801.04 kg/hm2 and 364.17, 424.75 and 475.51 mm.Compared with the conventional planting pattern, the yield under the wide ridge planting pattern was higher, and the amount of water consumption during the whole growth period was less.The wide ridge planting pattern had a number of advantages compared with the conventional planting pattern.For example, when it was watering under the wide ridge planting, the rate of flooding was significantly faster, and water in the trench flowed slowly to infiltrate into both sides of the ridge body during the irrigation time.Therefore, the wide ridge planting pattern was much more saving water than the conventional planting pattern.In addition, the wide ridge planting could effectively reduce soil moisture evaporation area, and reduce the amount of water consumption per unit output of winter wheat.The water use efficiency of the treatment with wide ridge planting and 70% of field moisture capacity was 1.91 kg/m3, while that with conventional planting and 60% of field moisture capacity was 1.88 kg/m3.The water use efficiency of winter wheat under the condition of wide ridge planting and 70% of field moisture capacity was the highest, which meant that it was the optimal planting and irrigation mode.The difference between maximum and minimum of water use efficiency was 0.03 kg/m3.Therefore, when the water resource of the area was abundant, the planting and irrigation mode with wide ridge planting and 70% of field moisture capacity could be taken as the best choice; when the water resource of the area was relatively scarce, the best choice was the conventional planting combined with 60% of field moisture capacity.The fuzzy comprehensive evaluation results are in agreement with the field test results, which indicates the feasibility of this method in the application of water saving irrigation.