2018 — 2019年在田间试验研究了滴水量和滴水频率对膜下滴灌制种玉米产量及活力的影响。结果表明，滴水量和滴水频率对制种玉米产量及其种子活力有不同程度的影响。滴水频率对制种玉米产量影响显著，滴水量为3 600 m3/hm2、10 d 1次滴水频率的玉米产量最高，2018 — 2019年2 a平均为10.55 t/hm2。在同一滴水量下，产量随滴水频率的增加呈先增加后减少的趋势；在同一滴水频率下，产量随滴水量的增加呈先增加后减少的趋势(2018年15 d/次滴水频率外)，10 d 1次产量明显高于15 d 1次与5 d 1次滴灌，差异达显著水平(P ＜ 0.05)。在滴水量为2 700、3 600 m3/hm2下，不同滴水频率的种子发芽率、发芽指数、发芽势、活力指数均有所提高。说明适宜的滴水量及滴水频率对种子活力有积极的作用。滴水量和滴灌频率对种子的电导率的影响与其对发芽率、发芽指数、活力指数的影响基本表现一致。因此，在当地条件下，用中滴灌量(3 600 m3/hm2)和中频(10 d 1次)的滴灌模式较为合理。

A field experiment was carried out from 2018 to 2019 to investigate the effects of irrigation amount and irrigation frequency on the yield and seed vigor of seed corn under mulched drip irrigation. The results showed that the irrigation amount and irrigation frequency of water drop had different effects on corn yield and seed vigor. The drip frequency had a significant effect on the yield of seed corn, and the highest yield was 3 600 m3/hm2 and drip frequency once every 10 days, with an average of 10.55 t/hm2 in two years from 2018 to 2019. Under the same drop of water, the yield increased first and then decreased with the increase of dripping frequency. At the same drip frequency, the yield increased first and then decreased with the increase of drip water (in addition to the frequency of 1 drip every 15 days in 2018)， and the yield of medium-frequency drip irrigation was significantly higher than that of low-frequency drip irrigation and high-frequency drip irrigation, with a significant difference(P < 0.05). The germination rate, germination index, germination potential and vigor index of seeds under medium frequency drip irrigation(drip irrigation once every 10 days) and high frequency drip irrigation(drip irrigation once every 5 days and drip irrigation once every 15 days) were increased. The results indicated that the irrigation amount and irrigation frequency had positive effects on seed vigor. The effect of irrigation amount and irrigation frequency on the electrical conductivity of seeds was basically the same as that on the germination rate, germination index and vigor index. Therefore, it was suggested that the optimal irrigation amount was 3 600 m3/hm2 and irrigation frequency was once every 10 days for the local condition.

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国家重点研发计划项目(2016YFC0400207)；甘肃省区域创新中心项目(2019GAAS48-1)。