以冬小麦‘石麦18’为研究对象，通过设置不同灌水定额，进行灌水试验，研究了不同灌水定额处理下大田冬小麦的耗水规律及产量构成因素。结果表明：在试验设置的灌水定额范围内，不同灌水定额处理对冬小麦株高、穗长、小穗数、千粒重及产量的影响差异均不显著，但显著影响亩穗数和穗粒数。在试验区，当冬小麦播种后土壤含水量在田间持水率70％左右，生育期有效降水量约140mm，冬小麦品种‘石麦18’在返青期和灌浆期分别灌水1次，每次灌水35～40m3／667m2，可达到节水高产的效果。%In this paper ,winter wheat (Triticum aestivum L .) variety ‘Shimai 18’ was used to study the water consumption pattern and yield components of winter wheat by setting the different irrigation quota .The results showed that irrigation quota had no significant effect on plant height ,spike length ,spikelet number ,1 000‐grain weight and yield within the scope of the test .But it had significant effect on spike numbers of 667 m2 and grain numbers per spike . On the premise of both water saving and high yield for winter wheat variety‘Shimai 18’ ,it is suggested that soil water content accounts for 70 percent of field water‐holding rate ,effective rainfall is about 140 mm during the growing season ,irrigation quota for winter wheat is 35-40 m3 per 667 m2 and irrigated once during returning‐green and grain filling stages in the pied‐mont plain of Hebei province .
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