怎样预防果树花期霜冻答陕西读者秦春华果树在严寒的冬季，即使气温下降到－２５──－３５℃，也不致冻死，但在春季果树开始生长、花芽开放时期，由于花器官中水分含量多，细胞液浓度低，就是短暂的低温都是危险的。如苹果、梨、桃等在花期经。２℃以下低温２－４小时，... How to prevent fruit frost in winter? Readers Qin Chunhua Fruit trees in cold winter, even if the temperature dropped to -25 ─ ─ -35 ℃, nor freeze-dried, but in the spring fruit trees began to grow, flower buds open, , Low concentration of cell fluid, is a temporary low-temperature are dangerous. Such as apples, pears, peaches and other flowering period. 2 ℃ the following low temperature 2-4 hours, ...