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冬小麦越冬冻害生态问题可分为麦苗抗冻能力和环境低温两个方面。本文对麦苗抗冻能力定量鉴定方法进行了评定,进而运用此法对冬麦新冬二号品种在新疆乌拉乌苏越冬期间各时期抗冻能力进行系统测定。麦苗抗冻能力的变化主要由环境温度所决定。依环境温度与小麦生长状况、抗冻能力的关系,把冬麦越冬分成冻融、稳定封冻、融冻三个生态阶段,每个生态阶段又分成两个生态时期。依不同生态阶段、时期产生冻害的生态条件,把冻害分为秋、冬季低温和冬季、早春融冻四种类型。
Winter wheat winter frost damage ecological problems can be divided into wheat frost resistance and environmental low temperature two aspects. In this paper, the method of quantitative identification of wheat frost resistance was evaluated, and then the method was used to systematically determine the frost resistance of winter wheat Xin Dong II in winter during the winter. The change of wheat frost resistance is mainly determined by the ambient temperature. According to the relationship between ambient temperature and wheat growth and frost resistance, the winter wheat was divided into three phases: freeze-thaw, stable freezing and thawing, and each ecological stage was divided into two ecological periods. According to different ecological stages, ecological conditions of frost damage during the period, the frost damage is divided into autumn, winter and winter, early spring melt four types.