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以8个夏谷品种为材料,在大田试验条件下,系统研究了谷子产量和氮肥利用效率的品种间差异及对氮肥的响应。结果表明,8个夏谷品种的平均产量以施氮处理显著高于不施氮处理,平均增产率为8.2%;氮肥对8个品种的增产效应不同,以济谷14、济谷17和济谷18增产效果显著,而对其它品种的产量无显著的促进作用。8个夏谷品种的氮肥利用效率存在差异;氮肥农学效率以济谷14最高,与其它品种达显著性差异;而豫谷18和济谷18的氮肥偏生产力显著高于其它品种。因此,在华北夏谷生产中,应结合当地生产情况和不同品种氮肥利用特性进行品种的选择和应用。
Eight varieties of summer-valley cultivars were used to study the differences in grain yield and nitrogen use efficiency among varieties and the response to nitrogen fertilizer under field conditions. The results showed that the average yield of 8 summer-summer cultivars was significantly higher than that of no-nitrogen treatments, and the average yield was 8.2%. The yield-increasing effects of nitrogen fertilizer on 8 cultivars were different. Valley 18 yield significant results, while no significant role in promoting the yield of other varieties. The nitrogen use efficiency of 8 summer-summer cultivars differed. The highest nitrogen-fertilizer agronomic efficiency was the highest in Jigu 14 and significant difference with other cultivars. The partial-nitrogen fertility of Yugu 18 and Jigu 18 was significantly higher than that of other cultivars. Therefore, in the production of summer cereal in North China, the selection and application of varieties should be based on the local production and the characteristics of nitrogen utilization of different varieties.