How to select orange seeds? What are the seedling raising methods?

There are many orange varieties currently cultivated in China, and in many regions oranges have become local specialty agricultural products. Below let us learn together how to select orange seeds and what seedling raising methods there are. Friends who want to grow oranges, take a look.

1. How to select orange seeds?

1. Navel orange

Navel orange is suitable for fresh eating. Its main feature is a conical secondary fruit inside the fruit, characterized by a navel at the top of the fruit, that is, a small underdeveloped fruit embedded at the top of the fruit. Seedless, the flesh is crisp and tender, with a rich sweet taste and slight acidity. Gannan navel orange is a variant variety of navel orange. The fruit is larger than ordinary oranges, generally has no seeds, is parthenocarpic, and is easier to peel.

2. Rock sugar orange

Rock sugar orange, also known as rock sugar mandarin, originated in Qianyang County, Hunan (now Hongjiang City). Rock sugar orange is favored by the market for its excellent variety, rich sweet aroma, thin peel, flesh that does not stick in the teeth, and crisp tender flesh. It is a variation of the local common sweet orange, cultivated more in Hunan, with a small amount of cultivation in Sichuan, Chongqing, Guizhou, Yunnan, and Guangdong and Guangxi.

3. Sweet orange

The fruit is generally round, with the fruit characteristics of red-flesh navel orange, orange in color, with no navel at the top, or occasionally with a ring mark. Sugar orange, also called acidless sweet orange, has a fruit shape similar to ordinary sweet orange. Because its acid content is extremely low, it can be harvested and marketed once the juice content reaches an appropriate level, and it is a very early-maturing sweet orange variety.

4. Blood orange

The flesh and juice of blood orange are entirely purplish red or dark red. The flesh is tender and juicy, with a special fragrance. It is a variant of orange, but generally even smaller than an orange. It is mainly named for the red color of the flesh and juice due to the presence of anthocyanins. The skin of blood orange is smooth, smaller in size than ordinary oranges, usually with small sunken dots, and red in color.

2. What are the orange seedling raising methods?

1. Sowing amount

There are more than 2000 orange seeds 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; in actual operation it is restricted by various conditions. Generally, for overwintering sowing, each jin can produce about 2000 seedlings; for spring sowing, each jin can produce 2500 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 facility seedling raising, or low tunnel covering seedling raising, the sowing quality can be improved and the emergence rate increased. The soil quality of the seedling bed and the level of management have a great impact on the emergence rate. Many seedling growers suffer serious losses due to seedbed and management problems, and the emergence rate may be less than 50%, or even lower.

2. Timely sowing

Xiangcheng 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, seeds should be soaked in medicine for disinfection. At the same time, soaking 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. Sowing density: sow 100-150 jin per mu. Many farmers do not pay much attention to sparse and even sowing, grabbing a handful and scattering it casually, resulting in uneven seed density, which affects seedling quality and also causes seed waste. In order to sow evenly, sowing should be done by dividing into beds and weighing the seed. 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 broadcast in each bed, and one portion can also be further divided into 2 equal parts and broadcast back and forth twice in the same seedling bed, making it easy to achieve even broadcasting.

3. Post-sowing management

Using 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 seedbed temperature, a greenhouse within a greenhouse can be used, along with mulching film, to raise the ambient temperature for seedling growth. If there is no facility covering, after sowing in autumn, winter and spring, mulching film needs to be used 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. It is best to transplant when the sapling is about 80 cm thick and 40 cm tall.

In summary, the above is all the content about growing orange seedlings from seed. Take a look and see what you need to learn more about. Friends who want to buy seedlings can click the link below to view.

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