The temperature of Xinfeng navel orange

When the average daily temperature in spring is stable above 12.8℃, navel oranges begin to sprout, and the average daily temperature is 23-29℃, which is most suitable for their growth and development. It is required that the active accumulated temperature ≥ 10℃ within one year should be above 5500℃. Navel orange can tolerate a short-term low temperature of -6.5℃, but the extreme minimum temperature in winter is preferably above -3℃. The extreme minimum temperature in Xinfeng is -5. 1℃, which occurs in199965438+February, and the frequency of extreme minimum temperature in Xinfeng ≤-3℃ is 17.5%. The frequency of extreme minimum temperature ≤-5℃ is less than 1.0%, that is, it has only appeared once since meteorological records; The frequency of ≤-5℃ is obviously lower than that of Anyuan, Dayu and Xunwu. The frequency of ≤-7℃ is 0.0%, which means that there has never been a low temperature weather below -7℃ in Xinfeng County since its own data. The low probability of freezing injury is one of the advantages of Xinfeng in developing navel orange.