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为了探索冀中南地区冬小麦-夏玉米节水生产新途径,试验设“一水两用”技术(玉米生育后期浇水同时达到玉米增产和小麦足墒播种的目的)的浇水时间分别为9月10日和20日,以玉米生育后期不浇水为对照,研究了不同浇水时间对玉米产量以及下茬小麦播种前0~20 cm耕层含水量和0~200 cm土层储水量的影响。结果表明:与对照相比,9月10日和20日浇水对玉米穗粒数影响不大,但均能提高千粒重和产量,增产率分别为6.35%和4.44%;0~20 cm耕层含水量平均提高4.00%和7.43%,0~200 cm土层储水量平均提高2.38%和4.49%。“一水两用”技术不同浇水时间对玉米增产以及提高土壤储水量的效果不同,应根据不同的主目标选择不同的浇水时间:以提高夏玉米产量为主目标时,宜在9月10日前后夏玉米灌浆活跃期前浇水;以提高小麦播前土壤储水量和耕层含水量为主目标时,宜在9月20日后浇水。
In order to explore a new approach to water saving production of winter wheat and summer maize in central-southern Hebei, the watering time of the “double-use and one-water” technology (the purpose of watering maize at the later growth stage and increasing the yield of maize and sowing soil with wheat soil moisture) September 10 and 20, the late maize growth without water as a control, studied the different watering time of corn yield and the next crop before sowing 0-20 cm topsoil and 0 ~ 200 cm soil water storage capacity Impact. The results showed that compared with the control, watering on September 10 and 20 had little effect on the number of kernel per spike, but all of them increased the 1000-grain weight and the yield, with the increment rates of 6.35% and 4.44%, respectively. The 0-20 cm layer The water content increased by 4.00% and 7.43% on average, while the water storage in 0 ~ 200 cm layer increased by 2.38% and 4.49% on average. “A water and dual use ” technology Different watering time on corn yield and improve soil water storage effect is different, should be based on different main goals to choose different watering time: to increase the yield of summer maize as the main goal, should be in September 10 before and after the summer corn filling active period of watering; to improve wheat sowing before the soil water storage and water content as the main goal, should be after September 20 watering.