疏剪不同穗位小穗对小麦籽粒结实和粒重的影响

１９９７～１９９８年在河南省农作物品种展览中心以中大穗小麦品种温麦６号为材料，设计了去除不同穗位小穗的试验。结果表明，去除不同位小穗对结实粒数和粒重的影响不同， 除顶端小穗的粒数下降较多，穗粒重最低，却除基部小重申对结实粒数和粒重的影响较小，穗粒数和粒重下降较少；却除中部小穗对结实粒数影响较大，穗粒数量小，其穗粒重因剩余籽粒单粒重增加而得以一定程度补偿。

Effects of removing spikelets in different locations on wheat setting kernels and grain weight

An experiment of removingspikelets in different locations was conducted on winter wheat at crop varietiesexhibition center in Henan province in 1997-1998.WM 6 was chosen as research material.Theresult indicated that the effect of removing spikelet in different location on settingkernels and grain weight was various.Grain weight of removing top spikelet decreased muchmore,and its grain weight was the lowest.The effect of removing base spikelet on settingkernels and grain weight was slighter,kernels and grain weight per ear decreased less.Theeffect of removing middle spikelet on set-ting kernels was greater,kernels per ear wasless,its single grain weight increase compensated partly the loss which resulted fromkernels decreasing.