Abstract: The effect of different water and fertilizer conditions on dryland wheat yield and water and fertilizer use efficiency was discussed in this article. The experiment results showed the water and fertilizer conditions had an obvious influence on wheat height, fringe length, amount of fringe grain and weight of 1000 grains. The fertilizer treatments of supplement irrigation and no irrigation increased production 39.2%～142.6% and 34.2%～152.3% individually than that of ck. At the same time, the supplement irrigation treatments increased production 21.0%～40.2% than that of no irrigation. In all of the fertilizer treatments, the fertilizer use efficiency of the treatment of N_1P_1 was the highest, and the supplement irrigation was better than that of no irrigation. The fertilizer use efficiency of supplement irrigation and no irrigation of the treatment of N_1P_1was 18.0 kg and 13.0 kg wheat grain per kilogram fertilizer. And the analysis of irrigation water use efficiency of different fertilizer treatment approve this viewpoint, the water use efficiency of different fertilizer treatment augmented 0.17～0.72 kg/m³ than that of ck, and the treatment of N_1P_1 was the highest, which water use efficiency got to 1.16 kg/m³. Therefore, the reasonable irrigation play a positive role on dryland crops production, and the good coupling of water and fertilizer has an important affect on improving irrigation water use efficiency.

Key words: Dryland, Wheat, Supplement irrigation, Water and fertilizer use efficiency

CLC Number: 

• S14