关键词: 对策, 对策

Abstract: To alleviate the crisis of water resource shortage of accelerated climate change and ecological risk, we explored reasonable and efficient water-saving irrigation methods, we improved crop water use efficiency adaptability. Through the different irrigation methods and sowing date were tested in field mulched spring maize. The whole growth period of spring maize were continuously observed, which yield and water use efficiency were analyzed else. The effect of the different irrigation methods and different sowing date on spring maize’s yield and water use efficiency were analyzed. The results showed that: drip irrigation, sprinkler irrigation and flood irrigation 3 irrigation methods in which drip irrigation was the most conductive to spring maize in dry matter accumulation. The second sowing date had better growth amount of dry matter accumulation, especially between the milky stage and mature stage were significantly (P<0.05). Drip irrigation and sprinkler irrigation had more number of roots. Sprinkler irrigation’s roots were longer and thicker, which with drip irrigation and flood irrigation were significant difference (P<0.01). Drip irrigation and sprinkler irrigation’s ear length and ear diameter were better. Drip irrigation’s bald was shortest. Grain weight and grain weight per showed drip irrigation > sprinkler irrigation > flood irrigation, which difference were significant (P<0.05). The second sowing date which yield was better than third period and the first date. Drip irrigation had high yield, less water consumption and water use efficiency was the highest. The third sowing date had higher yield and less water consumption, which had highest utilization efficiency, which was significant difference (P<0.05). In short, drip irrigation was the most suitable for arid region of drought, which was water, fertilizer and yield irrigation mode. The second sowing date was the best sowing time, and the climate warming was in favor of late sowing, late-maturing varieties, promotion and yield.