一、越冬期冻害小麦越冬期发生冻害的原因有以下几种:1.品种春性较强。冬小麦需要一个低温阶段才能起身拔节,我们称这个低温阶段为春化阶段。品种通过春化所需的温度越低、时间越长,该品种的冬性越强;反之,春性强。小麦通过了春化阶段,发育进 First, overwintering frost damage occurs over winter winter frost damage due to the following: 1 varieties spring stronger. Winter wheat needs a low temperature stage to get up and join, we call this low temperature stage for the vernalization stage. Varieties through the vernal the lower the temperature required, the longer the winter varieties of the more strong; the other hand, strong spring. Wheat passed the vernalization stage and developed