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

Speaking of bitter orange, most friends are probably quite familiar with it. It is harvested from nearly ripe bitter orange fruit, collected while the peel is still green, cut in half, and dried in the sun. So how do you select bitter orange seeds? What are the seedling raising methods? Friends who want to know, take a look at the following article!

1. How to select bitter orange seeds?

Bitter orange seeds should be plump and glossy, which is also the basis for successful planting. Undamaged fresh seeds have a germination rate far higher than inferior seeds. Generally speaking, many seed shops sell bitter orange seeds. If you want convenience, you can buy them online, or you can buy them from our Nongxun Network.

2. Bitter orange seed seedling raising methods

1. Seed seedling raising and transplanting

It can be sown in winter or in spring. Winter sowing is carried out after seed collection in the same year, and spring sowing is carried out in early to mid-March. Drilling is generally used, with a row spacing of 30 cm and a plant spacing of 3-6 cm. After sowing, cover the seeds with fine soil, then spread straw. Before emergence, the seedbed soil should be kept moist. After the seedlings break through the soil, remove the covering promptly. When the seedlings are 10-15 cm tall, combine intertillage and weeding with 1 topdressing of human and livestock manure water and ammonium sulfate, and apply another topdressing in summer and autumn. In winter, to prevent frost damage, a shed can be built for covering. In the following year, when the seedlings are about 1 m tall, transplant them at a row spacing of 30-50 cm and a plant spacing of 25-30 cm.

2. Grafting seedling raising

It can be carried out in February-March, May-June, or in late autumn and early winter. The rootstock used for grafting is cultivated by the seed propagation method, and biennial seedlings can be used as rootstock. Take biennial branches from high-yielding, robust mother trees as scions, and graft using the T-shaped bud grafting method and the single-bud cut grafting method.

3. Common varieties of bitter orange

1. Green-coated bitter orange

It is the nearly ripe fruit of the plant trifoliate orange, semicircular-spherical, about 2-3.5 cm in diameter. The outer skin is orange-brown or green-yellow, scattered with many small oil dots and net-like raised wrinkles, densely covered with fine soft hairs. One side of the fruit apex has an obvious residual style base, and the base side has a fruit stalk scar or a residual short fruit stalk. On the cross section, the peel is 4-6 mm thick, yellow-white, with 1-2 rows of brown-yellow oil dots along the outer edge; the pulp segments are 6-8 segments, shrunken and brown; the central column is 4-6 mm wide. Fragrant, and the juice sacs taste slightly sour and bitter. Produced in Fujian, Shaanxi and other places. 2. Bitter orange (Citrus aurantium)

Also known as Chuan bitter orange and Jiang bitter orange. It is the nearly ripe fruit of the plant bitter orange, mostly cut horizontally into semicircular-spherical shapes, 4.5-5.5 cm in diameter. The surface is green-brown or green-brown, slightly rough, scattered with many oil dots. One side of the apex has a residual style base, and one side of the base has a fruit stalk scar. On the cross section, the peel is about 6-12 mm thick, the mesocarp is yellow-white, and the edge has 1-2 rows of brown-yellow oil dots; the pulp segments are 10-13 segments, brown, and each pulp segment often contains several seeds; the central column is 7-11 mm wide. Fragrant, and the juice sacs taste bitter then sour. Produced in Sichuan, Hunan, Jiangxi, Zhejiang and other places.

3. Xiangyuan bitter orange

Also known as Jiang bitter orange and Chuan bitter orange. It is the nearly ripe fruit of the plant Xiangyuan, and its appearance is similar to bitter orange. The surface is brown or brown-brown, and there is usually a ring of golden coin ring around the residual style base. On the cross section, the peel is 7-13 mm thick, and the mesocarp is gray-white or white; the pulp segments are 10-12 segments; the central column is 4-7 mm wide. Fragrant, and the juice sacs taste sour then bitter. Produced in Sichuan, Jiangxi, Zhejiang and other places.

4. Daidai flower bitter orange

Also known as Su bitter orange. It is the nearly ripe fruit of the plant Daidai flower, usually cut horizontally into two, semicircular-spherical, 3-4 cm in diameter. The surface is green-yellow or orange-yellow, with many small oil dots and net-like wrinkles. One side of the apex has a tiny protruding residual style base, and one side of the base has a residual persistent calyx and fruit stalk scar. On the cross section, the peel is 5-10 mm thick, brown-yellow; the pulp segments are 9-12 segments; the central column is 4-8 mm wide. Fragrant, and the juice sacs taste bitter then sour. Produced in Jiangsu.

Bitter orange is a traditional Chinese medicine name. In rural areas, many households plant a few bitter orange trees in front of their doors. To grow high-quality bitter orange, you still need to select plump and glossy seeds, and then master certain seedling raising techniques. I hope this article can help everyone.

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