Red onion in northern Shaanxi is a local variety cultivated in Yan 'an and Yulin areas for many years. Plant height is 60 ~ 78 cm, tubular leaves are dark green, with medium thickness and wax powder on the leaves. Bulbs are oblate, 23 ~ 32 cm long, and the outer skin is semi-leathery and reddish brown. From May to June, local flowering plants germinated and there were 3- 15 purple-red aerial bulbs, among which 1-3 bulb buds were flowering plants with aerial bulbs on them. Bulbs are spicy and fragrant. It has the characteristics of strong tillering ability, cold tolerance, drought tolerance and barren tolerance, but it matures very late. In 1 year, aerial roots were sown in early autumn and planted in cold dew the next year. When harvested in the third year, the single clump weighs more than 370 grams, and the bulbs can reach 15000 ~ 22500 kg/ha.

Beijing purple skin

Beijing purple onion is a local variety. The height of the plant is more than 60 cm and the spreading degree is about 45 cm. The adult plant has 9 ~ 10 functional leaves, dark green and wax powder; Leaf sheath is thick and green. Bulbs are oblate, with a longitudinal diameter of 5-6 cm and a transverse diameter of more than 9 cm. Bulb skin is red and fleshy scales are light purple. A single bulb weighs 250 ~ 300 grams, and the scale is thick, but not dense, with more water and medium quality. Mid-late maturity. The yield per mu of 666.7 square meters is about 2,500 kilograms, and the high-yield field can reach 4,000 kilograms. The physiological dormancy period is short, easy to germinate and poor in storage.

High pile red skin

High-piled red-skinned onion was selected from Xi 'an red-skinned onion by Vegetable Research Institute of Shaanxi Academy of Agricultural Sciences. The plant grows vigorously, with dark green tubular leaves and wax powder. The bulb has a longitudinal diameter of 7 ~ 8 cm and a transverse diameter of 9 ~ 10 cm. Mature bulb skin is semi-leathery, purple-red, fleshy and white with purple halo. Single ball weight 150 ~ 200 g, middle and late maturity, fertilizer and water resistance, less tillering, strong cold resistance, but poor storage resistance. Generally, it can produce 3500 ~ 4000 kilograms per 666.7 square meters.

Gansu purple skin

The plant height of Gansu purple onion is more than 70 cm, and the adult plant is about 10 functional leaves, with dark green leaves, wax powder and thick leaf sheath (pseudostem). Bulbs are oblate, with a longitudinal diameter of 4-5m and a transverse diameter of 9 9- 10/0cm. Scales are semi-leathery, purplish red, with 7-9 layers of fleshy scales and lavender. A single bulb weighs 250 ~ 300 grams. Strong spicy taste, sufficient moisture and medium quality. Cold and drought-tolerant, but the dormancy period is short, germination is early and perishable. Generally, it can produce more than 3500 kilograms per 666.7 square meters.

Nanjing hongpi

The plant height of Nanjing red onion is about 70 cm, the tubular leaves are waxy green, the upper part of leaf sheath is green, and the lower part is yellow and white. Bulbs are oblate, with purple scales outside, white fleshy scales with purple halo spots, and 2 ~ 3 scales inside. The weight of a single bulb is100 ~150g. Strong cold resistance, short dormancy period and poor storage resistance. It can produce 1750 ~ 2000 kg per 666.7 square meters.

Jiangxi hongpi

The plant height of Jiangxi red onion is 50 ~ 70 cm, and the plant is 45 cm. Tubular leaves are dark green with little wax powder, and bulbs are oblate, with a longitudinal diameter of 5 cm and a transverse diameter of about 7 cm. Mature bulbs are covered with semi-leathery purplish red scales, fleshy scales are light purplish red, and the average weight of a single bulb is more than 200 grams. Strong spicy taste, crisp texture, easy to lose water and poor storage resistance. It can produce 1750 ~ 2000 kg per 666.7 square meters.

Guangzhou hongpi

Guangzhou red onion is a local variety in Guangzhou. The plant is erect, with a plant height of 50 cm and a leaf spread of 2 cm. The middle and lower parts of tubular leaves are thicker than those of red-skinned varieties, and the transverse diameter can reach 2 cm; Dark green with wax powder on the leaves. Bulbs are oblate, with a longitudinal diameter of 4 ~ 5 cm and a transverse diameter of about 7 cm. The skin is semi-leathery and purplish red; Weight of each bulb 100 ~ 150g. Strong cold resistance and disease resistance; But it is not resistant to high temperature and belongs to short-day variety.

Fujian purple skin

Fujian purple onion is the main cultivated variety in Fuzhou, Yongtai and Changle. The plant is relatively upright, with a plant height of about 50 cm. The tubular leaves are dark green with a lot of wax powder on them. Bulbs are flat, with a longitudinal diameter of about 5 cm and a transverse diameter of about 8 cm. Mature bulb skin (scale skin) is semi-leathery and purple; Fleshy scales were lavender and white before, and the weight of a single bulb was about 120g. The taste is sweet and spicy, and the onion is rich, so it can be eaten fresh. The dormancy period is short and it is not resistant to storage. It can be produced per 666.7 square meters 1000 kg. It belongs to short-day variety.