对陕西关中地区小麦品种发育特性的研究表明 ,随着品种更换虽然进入幼穗伸长的时间缩短 ,但品种未出现春性化 ,开花期在品种间差异不大 ,但二棱期至开花期的时间缩短 ,这是感光性减弱的结果 ;由于伸长期至二棱期的时间延长 ,从而利于增花增粒。近期育成的大穗品种多有明显的春性化、强感光性 ,需要加以改进。 Studies on the developmental characteristics of wheat cultivars in the Guanzhong area of ​​Shaanxi Province showed that the varieties did not appear to be springy with the change of variety but the time of entering the young ears was shortened, Of the time is shortened, which is the result of weakened photosensitivity; due to the extended period to the two-edge period of time lengthened, which is conducive to flowering by grain. Recently bred varieties of large ears have obvious spring, strong sense of light, need to be improved.