【摘要】 为了解蒙头水在小麦生产中的作用,以大面积种植的小麦品种矮抗58为材料,结合耕作方式研究了灌蒙头水对小麦水分利用特征和产量形成的影响。结果表明,蒙头水对水分利用特征、籽粒产量及其构成因素影响较大,耕作方式效应较小。与不灌蒙头水相比,灌蒙头水处理的拔节前和全生育期耗水量分别增加38.15%和15.35%,降水利用效率和土壤水利用效率分别提高20.70%和20.94%,灌溉水利用效率降低31.18%。灌蒙头水显著提高穗数、穗粒数和籽粒产量,对千粒重影响较小。建议在播前土壤墒情不足时补充蒙头水。更多还原

【Abstract】 To understand the effects of irrigation after seeding of wheat on water utilization and yield component of wheat,the widely adopted cultivar "Aikang 58" was used as material and combined with different tillage.The results showed that irrigation after seeding had great effects on water consumption characteristics,grain yield and its component,and the tillage had less effects.Comparing to no irrigation after seeding,the treatment of irrigation after seeding increased evapotranspiration before jointing and evapotranspiration of whole growing stage by about 38.15% and 15.35%,respectively;and the water use efficiency of precipitation and soil water increased by about 20.70% and 20.94%,respectively,while the water use efficiency of irrigation water decreased by about 31.18%.The treatment of irrigation after seeding increased significantly number of spikes,number of grains per spike and grain yield,and affected little on grain weight.It was proposed that irrigation after seeding in low soil water content.更多还原