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以新两优6号为试验品种,研究了精确定量灌溉、无水层灌溉、常规灌溉、旱作对杂交水稻分蘖动态、生育期、产量及其构成因子的影响。结果表明:过多或过深的水分会抑制分蘖,湿润或无水会促进分蘖,过度干旱会加速后期分蘖消减;不同水分管理对生育进程和全生育期影响不大;无水层灌溉有效穗数、每穗总粒数和结实率较高,产量最高,旱作的有效穗数、每穗总粒数和结实率较低,产量最低,不同水分管理对千粒重影响不大。在水稻生产上以干湿交替的无水层湿润灌溉取代长期上满田水的传统灌溉方式,不仅可以提高产量,还可以节约水资源。
Using Xinliangyou 6 as test variety, the effects of precise quantitative irrigation, waterless irrigation, conventional irrigation and dry cultivation on tillering dynamics, growth period, yield and its components of hybrid rice were studied. The results showed that too much or too much water would inhibit tillering, wetting or no water would promote tillering, excessive drought would accelerate the reduction of late tillering; different water management had little effect on the growth and the whole growth period; The number of panicles per panicle and the seed setting rate were the highest, the highest yield, the effective panicle number per panicle, the lower panicle number and seed setting rate per panicle, the lowest yield and the different water management had little effect on 1000-grain weight. In the rice production, wet and dry alternating wet and dry irrigation instead of long-term Mantian water irrigation methods, not only can increase production, but also can save water resources.