Which orange tree seedling variety is best? What are the seedling raising methods?

Many people talk about oranges and mandarins separately, but the orange is actually also a kind of citrus. At present, varieties such as rock sugar orange, navel orange and blood orange on the market are all very popular. So if you grow oranges, which orange tree seedling variety is best?

1. Which orange tree seedling variety is best?

1. Tarocco blood orange

The tree vigor is moderate, the crown is round-headed and medium-sized, irregular; the fruit is obovate or short elliptical, with obvious grooves at the stem end, the single fruit weighs about 150 grams, the fruit color is orange-red and relatively smooth; the flesh color is deep, entirely purple-red, crisp and tender with abundant juice, sweet and sour and palatable, with a rich aroma, nearly seedless, and of superior quality; the fruit matures in January to February of the following year and stores well. As a late-ripening sweet orange, the Tarocco blood orange is an excellent orange variety vigorously promoted in our country.

2. Newhall navel orange

The Newhall navel orange is a fresh-market variety with a beautiful appearance, excellent flesh quality and good commercial value. It originated in the United States and was produced by a bud mutation of the Washington navel orange in Duarte, California.

3. Gannan navel orange

The Gannan navel orange is large and well-shaped, bright orange-red, smooth and beautiful, with an edible rate of 85%, crisp and tender flesh that melts in the mouth, a rich sweet aroma, and a juice content of more than 55%.

4. Australian finger lime

The finger lime is rich in citric acid and vitamin C. After grinding the finger lime into a sticky paste, applying it to the face every day can effectively remove acne and spots and keep the skin fair and delicate. The finger lime also has certain medicinal value and has a dietary therapeutic effect on people with weak gastrointestinal function.

5. Rock sugar orange

The rock sugar orange is much welcomed by the market for its excellent variety, rich sweet aroma, thin peel, tendency not to stick in the teeth, and crisp and tender flesh. It is a variation of the local common sweet orange, [4] originating in Hongjiang City, Hunan, with more cultivation in Hunan and a small amount of cultivation in Sichuan, Chongqing, Guizhou, Yunnan, Guangdong and Guangxi.

2. Orange tree seedling raising methods

1. Sowing amount

Orange seeds number more than 2,000 per jin. Because the seeds are polyembryonic, they may send out 2 or more young shoots, so each jin of seeds may produce more seedlings than the number of seeds. Of course, this is only theoretically possible, and actual operation is restricted by various conditions. Generally, for overwintering sowing, each jin can produce about 2,000 seedlings; for spring sowing, each jin can produce 2,500 seedlings. This is because overwintering sowing may encounter low-temperature cold damage, affecting the emergence rate and seedling survival rate. If overwintering sowing uses greenhouse facilities for seedling raising, or small arched shed covering for seedling raising, the sowing quality and emergence rate can be improved. The soil quality of the seedling bed and the level of management have a relatively large impact on the emergence rate. Many seedling growers suffer serious losses due to seedling bed and management problems, and the emergence rate may be less than 50%, or even lower.

2. Timely sowing

The fragrant orange rootstock can be sown in autumn, winter and spring, but caution is needed in summer. Summer temperatures are relatively high and sunlight is intense, which easily causes high-temperature damage and affects the normal growth of seedlings. Before sowing, the seeds should be soaked in a medicinal solution for disinfection. At the same time, soaking the seeds for 2 hours can increase the germination rate and reduce seed loss. In areas where the average winter temperature is not low and the frost-free period is relatively long, fresh seed sowing can be adopted. Fresh seeds can be sown after drying the surface moisture in the sun. Fresh seed sowing in autumn can extend the growth time and allow earlier grafting. For sowing density, sow 100-150 jin per mu. Many farmers do not pay much attention to thin and even sowing; they grab a handful and scatter it randomly, causing uneven seed density, which affects seedling quality and also causes seed waste. In order to sow evenly, sowing should be carried out by dividing into beds and weighing. For example, if a piece of land has 10 seedling beds, before sowing the seeds can be divided into 10 equal portions, with one portion sown in each bed, and one portion can also be further divided into 2 equal parts and scattered back and forth twice in the same seedling bed, making it easy to achieve even sowing.

3. Post-sowing management

Adopting greenhouse covering cultivation can help the healthy growth of overwintering sown seedlings. Plastic greenhouses include two types: steel-frame greenhouses and bamboo-wood greenhouses. In order to increase the seedling bed temperature, a large greenhouse can be combined with a small shed and covered with plastic film to increase the environmental temperature for seedling growth. If there is no facility covering, after sowing in autumn, winter and spring, plastic film needs to be covered to keep warm and moist and promote germination and growth. After one year of growth, the plant height can generally reach 30-50 cm, and the seedling diameter is 4-5 mm; in the second year the plant height can reach 70-80 cm, with a diameter of about 8 mm. For transplanting, it is best when the sapling is about 80 cm thick and 40 cm tall.

In summary, the above is all the content about orange tree seedlings. Everyone can choose varieties suitable for planting in your local area. I hope it can help everyone learn.

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