Green onions are divided into three types: stick green onions, drumstick green onions and tillering green onions based on the shape of the pseudostem (scallion white) and tillering properties.
1. Stick scallions: The upper and lower thickness of the green onion pseudostem (scallion white) is basically the same, shaped like a straight stick, and the base of the pseudostem is not enlarged or tillered. According to the height and thickness of the pseudostem (white onion), onions can be divided into four varieties: tall and thick, tall and thin, short and thick, and short and thin.
(1) Tall and thick type: the plant height is more than 1 meter, the pseudostem (green onion white) is more than 40 cm long, the pseudostem (green white) transverse diameter is more than 2.5 cm, the pseudostem (green white) index (pseudostem The length/pseudostem transverse diameter) is between 15 and 20. The flattened width of the tubular leaves (leaf width) is more than 3 cm, the leaf type index (leaf length/leaf width) is about 20, and the leaf spacing is about 2 cm. Green onion has a higher water content, less crude fiber, lower spicy oil/sugar ratio, and a sweeter taste. It can be eaten raw or cooked. Representative varieties include Chinese giant onions, etc.
(2) Tall and thin type: the plant height is more than 1 meter, the pseudostem (green white) is more than 40 cm long, the transverse diameter of the pseudostem (green white) is about 2 cm, and the pseudostem index is more than 20. The flattened width of the tubular leaves (leaf width) is less than 3 cm, the leaf shape index is more than 22, and the leaf spacing is about 2 cm. Green onions have high water content, low crude fiber, low spicy oil/sugar ratio, sweet taste, and are suitable for raw consumption. Representative varieties include Zhangqiu Indus and so on.
(3) Short and thick type: the plant height is less than 1 meter, the pseudostem (green white) is less than 40 cm long, the transverse diameter of the pseudostem (green white) is more than 2.5 cm, the pseudostem index is less than 15, and the tubular leaves are pressed The width after flattening (leaf flat width) is more than 3 cm, the leaf type index (leaf length/leaf flat width) is less than 17, and the leaf spacing is about 1.5 cm. Onion white has high dry matter content, rich crude fiber, high spicy oil/sugar ratio, spicy taste, and is suitable for cooked food. Representative varieties include Tianjin Wuye Qi and so on.
(4) Dwarf type: The plant height is less than 1 meter, the length of the pseudostem (white onion) is less than 40cm, the transverse diameter of the pseudostem (white onion) is about 2cm, the index of the pseudostem (white onion) (pseudostem The length/pseudostem transverse diameter) is between 15 and 20. The flattened width of the tubular leaves (leaf width) is less than 3 cm, the leaf shape index is about 20, and the interleaf spacing is about 1.5 cm. Onion white has a higher dry matter content, more crude fiber, a higher spicy oil/sugar ratio, a spicier taste, and can be eaten raw or cooked. Representative varieties include Shaanxi Shion.
2. Chicken legs and green onions: The base of the green onion pseudostem (white) is swollen like a chicken leg or a garlic head. The green onions are short and thick. The green onion white index is lt; 10 based on the transverse diameter of the middle part of the green onions. The distance and angle between the leaf openings of adjacent leaves are similar to those of the short onion white type. The spicy oil/sugar ratio is higher than that of the onion type, and the flavor is strong and spicy, so it is suitable for cooked food. High dry matter content, durable for storage. Representative varieties include Hebei Longyao chicken legs and green onions, Shandong Laiwu chicken legs and green onions, etc.
3. Tillering green onions: During the vegetative growth of green onions, the plant will tiller 1 to 3 times. Each tillering will grow from 1 plant to 2 to 3 plants, and 6 to 10 ramets can be produced in a year. After low-temperature vernalization, each ramet can bolt, bloom, and bear fruit at the same time. The plants are larger than onions. Representative varieties include Qingdao onions, Anhui Huangling green onions, etc.