小麦生长发育后期灌水对产量的影响

摘要

The treatments were set as watering at flowering stage and on the 8th, 15th and 22nd day after anthesis combined with different water amounts , and the effects of different watering time and water amount on wheat yield were studied in this paper .The results showed that the optimal water amount was 84 mm for wate-ring at late growth stage , and the best watering period was from flowering to 15 days after anthesis;the optimal watering combination was watering on the 8 th and 22 nd day after anthesis .The best combination for the high-est yield was watering at flowering stage and on the 8 th and 15 th day after anthesis because of its lower com-parative benefit .%设置开花及花后8、15、22天灌水与不同灌水量组合成6个处理，研究不同时期不同灌水量对小麦产量的影响。结果表明：后期最佳灌水量为84 mm，最佳灌水时段为开花至开花后15天，最佳灌水组合为开花后8天＋开花后22天，最高产量（666．7m2理论产量514 kg）的灌水组合为开花水＋花后8天＋花后15天，最高产量灌水组合并非最佳产量灌水组合，因其比较效益降低。