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麦苗越冬冻害与降温强度和低温持续时间长短有关,也与品种、播期、播种质量等有很大关系。因此,要落实好各项栽培管理技术措施,如遇冻害,应及时采取补救措施,使小麦生产达到稳产、增产目的。一、小麦越冬冻害原因1.品种因素小麦可分为冬性品种、半冬性品种和春性品种3类。各类品种播种后都需要通过春化发育阶段才能拔节抽穗。3类品种通过春化阶段需要的温度和时间不同。冬性品种是在0～3℃条件下,30～50天可完成春化阶段;半冬性品种在0～7℃条件下,15～30天可
Winter wheat frost damage and cooling strength and the duration of low temperature, but also with the variety, sowing date, sowing quality has a great relationship. Therefore, to implement various technical measures for cultivation and management, in case of frost damage, timely remedial measures should be taken so that wheat production can achieve stable production and increase production. First, the reasons for winter frost damage wheat 1. Varietal factors Wheat can be divided into winter varieties, semi-winter varieties and spring varieties 3 categories. After sowing all kinds of varieties need to develop stage of vernalization to jointing heading. The temperature and time required for the three species to pass the vernalization stage are different. Winter varieties in the 0 ~ 3 ℃ conditions, 30 to 50 days to complete the vernalization stage; semi-winter varieties at 0 ~ 7 ℃ conditions, 15 to 30 days