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大麦的叶片出现速度随播期不同变化很大。针对植株出土后的这种变化与光周期长度和变化率是否直接影响春性大麦的阶段发育和出叶速度，设计了一个室外盆栽试验，使用两个光周期敏感品种（Ｂａｎｄｕｌａ和Ｇａｌｅｏｎ），设置五个光周期处理。其中，两个为稳定不变的光周期（１４ｈ和１５．５ｈ），三个为不同变化率的光周期，即从出苗到芒发育始期分别为２、９、１３ｍｉｎ／ｄ。光周期处理对两个品种出苗到芒开始分化的持续时间有明显影响。芒的发育速度不受光周期变化率的影响，并与它所对应的绝对日长无关。尽管Ｂａｎｄｕｌａ在任一光周期处理中的持续时间比Ｇａｌｅｏｎ要长，但对光周期的敏感程度不变。当这个阶段划分为叶片分化（ＬＩ）和小穗分化（ＳＩ）时，很明显它们对光周期的敏感程度不恒定，一般ＳＩ阶段高于ＬＩ阶段，但敏感性的变化程度与品种有关，表明不同阶段对光周期的敏感程度是由独立基因控制的。最终的原基数目（叶片和最大小穗数）与光周期延长呈负相关，但无法证明光周期变化率的作用与平均光周期无关。两个品种对光周期的敏感程度在最终叶片数上相近，但在最大小穗数上，Ｇａｌｅｏｎ比Ｂａｎ－ｄｕｌａ更敏感。在所有品种和光周期处理的组合中，叶片数和积温呈高度线性关?
Barley leaf emergence rate varies greatly with different sowing dates. In response to this change after excavated and whether the photoperiod length and rate of change directly affect the stage development and leaf-out rate of spring barley, an outdoor pot experiment was designed using two photoperiod sensitive cultivars (Bandula and Galeon) Five photoperiod processing. Among them, two were stable photoperiod (14h and 15.5h), three photoperiods with different rates of change, that is, 2,9,13min / d from emergence to awakening. Photoperiod treatment significantly affected the duration of emergence of two cultivars to the beginning of differentiation. The rate of development of Mount is not affected by the rate of change of the light cycle and has nothing to do with the absolute daylength it corresponds to. Although Bandula lasts longer than Galeon in any photoperiod, it does not change its sensitivity to the photoperiod. When this stage is divided into leaf differentiation (LI) and spikelet differentiation (SI), it is clear that their sensitivity to photoperiod is not constant, generally higher in the SI stage than in the LI stage, but the degree of sensitivity varies with breed, indicating The sensitivity to photoperiod at different stages is controlled by independent genes. The final number of primordium (leaf number and maximum spikelet number) was negatively correlated with photoperiod extension, but the effect of photoperiod rate could not be proved to be independent of photoperiod. The sensitivity of the two cultivars to photoperiod was similar to that of the final leaves, but Galeon was more sensitive than Ban-dula at the maximum spikelet number. In all combinations of combinations and photoperiods, the leaf number and accumulated temperature showed a highly linear relationship.