据林业专家提供的情况。冬春两季气温较低。在果树的管理上必须注意防御冻害。其方法大致有以下3种。 物理法 就是冬春季节对果树直接进行包裹等防御冻害的方法。其效果较为显著,但若果园面积较大,则费工时。目前果农大多采用的物理法有:①在果树行间覆盖作物秸秆、树叶等,既可保墒,又能提高地温的果园覆草法;②在果树周围1m的直径 According to the information provided by forestry experts. Winter and spring temperatures are lower. In the management of fruit trees must pay attention to prevent frost damage. The method is roughly the following three kinds. Physical law is the spring and winter fruit trees directly wrapped and other frost damage prevention methods. The effect is more significant, but if the orchard area is larger, then the working hours. At present, most of the physical methods used by growers are as follows: (1) Cover the crop stalks, leaves, etc. between the rows of fruit trees, which can not only preserve soil moisture but also increase the ground temperature;