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间歇灌溉技术是以不同的土壤、施肥水平、气象条件为依据而采取的灌溉措施。间歇灌溉在分蘖期抑制矿质营养吸收,长穗期有促进作用。间歇灌溉对分蘖期和长穗期碳水化合物积累有显著促进作用。间歇灌溉能提高土壤氧化还原电位;增强根系活力;抑制无效分蘖,提高有效穗数;增强抗倒能力,改善受光姿势。产量与不同施 N 水平间差异达极显著水平,灌溉处理间差异不显著,但分蘖期、长穗期、结实期节水各达8.7%、22.9%、16.9%。
Intermittent irrigation technology is based on different soil, fertilization levels, meteorological conditions based on the irrigation measures taken. Intermittent irrigation inhibits mineral nutrient absorption at the tillering stage, and the promotion of long-heading stage. Intermittent irrigation significantly enhanced the accumulation of carbohydrates at tillering and panicle stage. Intermittent irrigation can increase soil redox potential; enhance root activity; inhibit ineffective tillers, increase effective panicles; increase lodging resistance and improve light receiving posture. There was a significant difference between the yield and the N application rate. There was no significant difference between irrigation treatments, but the water saving reached as high as 8.7%, 22.9% and 16.9% at the tillering stage, the heading stage and the setting stage respectively.