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The representative of Gannan navel orange is Xinfeng,

1982, China Southern Comprehensive Investigation Team confirmed that Xinfeng has unique natural conditions for navel orange cultivation. Xinfeng navel orange has been ranked among the best in the national navel orange appraisal for many times. Five navel orange varieties, such as Pengna, Newhall and Nafurina, were rated as national excellent products, and Xinfeng navel orange 12 strains all reached the standard of excellent products. Awarded the title of "high quality fruit" by the Ministry of Agriculture. Starting from 1983, Xinfeng county has been listed as a special supply base for navel oranges by its superiors. Xinfeng navel orange enjoys a high reputation in the market, which is in short supply and exported to more than 20 countries and regions such as Hong Kong, Macao, Taiwan, Japan, France, Britain and Russia.

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.

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