China is the hometown of the four navel oranges.

The four navel oranges in China are Fengjie, Gannan, Xinning and Zigui.

Fengjie: Fengjie navel orange is a famous fruit with the largest planting area and the highest yield in Chongqing. Fengjie navel orange Fengjie navel orange is generally orange or orange red. Fengjie navel orange has no seeds, juicy flesh, bright color, smooth skin, crisp and tender entrance, sweet and delicious. Among navel orange varieties, the best quality is "Washington navel orange".

2. Gannan: The story of Gannan navel orange begins with 197 1 Yuan Shougen planting the first navel orange tree. Gannan navel orange has become the world's three major navel orange brands, and Ganzhou has the largest planting area in the world. Gannan navel orange is huge in appearance, bright orange-red, smooth and beautiful in appearance, crisp and tender in meat and sweet and fragrant in taste.

3. Xinning: Xinning navel orange is one of the four navel orange bases in China. 1978 was designated as Hunan 15 citrus production base and one of the national 100 citrus production bases. There are 23,000 mu of navel oranges, with an annual output of 6,000 tons and an export of 2,000 tons. The output and export volume are the first of the four navel orange bases in China.

4. Zigui: Zigui navel orange Yichang produces citrus with a long history. Qu Yuan's Ode to Oranges proves that citrus was planted in Yichang at least two thousand years ago.

Digging and planting method

1, hole drilling: the planting density is 600-750 plants/hectare, the spacing between plants is 3.5-4m× 4m, and the density is based on the principle of facilitating agricultural activities. Dig the planting hole (80cm long, 80cm wide and 80cm deep) in advance.

Buried base fertilizer, mainly organic fertilizer, is applied in layers. When covering the soil, the bottom layer should be filled with weeds and miscellaneous soil fertilizers, and the top layer should be filled with topsoil and farmyard manure, and the pure land should be kept within 30 cm from the ground. And make it into a tree tray 30 cm above the ground for planting.

2. Planting: Generally, it is planted before the spring shoots germinate in February and March or after 10- 1 1 autumn shoots mature, with high survival rate. When planting, choose virus-free navel orange seedlings, tear open the nutrition bucket to keep the root system intact, put them in the center of the planting hole, gently lift the seedlings upward while filling them, so that the roots are closely connected with the soil, and then pour root water, and make a tree tray with a diameter of 1 m around the seedlings.

Within 1 month after navel orange seedlings are planted, according to the weather conditions, it will be drenched for 3-4 days 1 time; Cover the tree tray with weeds or straw to reduce water evaporation, keep the soil loose, keep the soil temperature, promote new roots and improve the survival rate.

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