近年来由于品种的更新和气候年度之间的差异,我县小麦播种上常常出现过早或过迟的偏向。如何做到适期播种成了生产上一个极待解决的问题。小麦早穗的为害:由于冬季气温偏高,小麦抽穗期由正常年的3月中,下旬,提早到3月上、中旬,部分社队甚至在2月中、下旬就开始抽穗,造成了所谓的“早穗”。过早抽穗受到的冷害大致可分为三种:一种是从抽穗后就可以明显看出,穗子的形态极不正常,穗子的某一部分(上、中、下部都有)小穗明显停止发育、退化,完全缺少生殖器官,受冻部分颖壳变白,个别严重者所有小穗都在早期中止发 In recent years, because of the difference between the renewal of varieties and the annual climate, the premature or late bias of wheat planting in our county often appears. How to make the right sowing has become a production of a problem to be solved. Early wheat damage: due to the high winter temperatures, the heading date of wheat from normal mid-March, late, early March to mid-March, some communes even in mid-February and early start heading, resulting in the so-called The “ear”. The chilling injury to premature heading can be roughly divided into three types: one is evident from the heading stage, the shape of the ears is extremely abnormal, and the spikelet obviously stops developing in some part of the ears (upper, middle and lower parts) , Degenerated, completely lack of reproductive organs, part of the cesium shell of the frozen part of the white, in some serious cases, all spikes are suspended in the early