The onion grows old, on the top there is something like an oval grape grain shape, there are a lot of small grains, and then after a period of time, the inside of the small grains slowly become black, that is the seed of the onion, you can use this small grains of planting onions.

The center of field management of green onions in autumn is to promote roots, strengthen trees and soften the soil, strengthen fertilizer management, create suitable environmental conditions for the formation of green onion white, and improve the yield and quality of green onions.?

1, watering: onion planting management center is to promote the root, should be controlled watering, drainage after the rain to prevent flooding, to prevent the cause of rotten roots, yellow leaves and dead seedlings; at the same time to strengthen the ploughing, to promote the growth of the root system. Between the Autumn and White Dew Festival, irrigation should master the principle of light watering, morning and evening watering. After the white dew onion into the growth period, irrigation should grasp the principle of hard water, heavy watering, every 4-6 days watering. With the watering spraying new high fat film 800 times liquid heat preservation, prevent water evaporation, isolate the invasion of airborne pathogens; in the frost after the temperature is reduced, the onion is basically grown, the water demand is reduced, to keep the soil moist. Stop watering 5-7 days before harvest to facilitate harvesting, storage and transportation.

2, fertilizer: onions in the application of sufficient fertilizer on the basis of staged fertilizer. After the autumn plant growth accelerated, after the application of "attack leaf fertilizer", per mu of rotted farmyard manure 1500-2000 kg, calcium superphosphate 20-25 kg, to promote the growth of leaves. White dew festival into the onion white growth period, is the key period of onion yield formation, should be combined with watering after the application of "tapping fertilizer" 2 times, each mu of urea 15-20 kg, potassium sulfate 10-15 kg, after the application of sprinkled in the rows, shallow plowing and then watering, and at the same time sprayed with the new high-fat film to improve the utilization of fertilizer active ingredients. The company's website is a great place to find out more about the company's products and services.

3, soil cultivation: soil cultivation is an important measure to soften the leaf sheaths, preventing collapse and improving the yield and quality of white onions. From the Autumn Festival to the harvest, generally cultivate soil three times, the first two times combined with plowing, the ridge soil congestion into the onion ditch, the ditch will be filled in after the summer heat; onions each time to cultivate the soil height, should be based on the height of the pseudostem growth, each time 3-4 centimeters, will be the soil cultivated to the uppermost leaf blade leaf outlet, do not bury the heart of the leaves, to prevent the leaf blade rot, combined with the cultivation of soil in a timely manner, sprayed with the strong stem spirit so that the garlic plant pole stems, leaf blade thick, leaf color, bright, and fresh, and the natural taste is strong, the commercial value is high. The natural taste is strong, high commodity value.

Extended information

Scallions can be divided into ordinary onions, scallions, scallions and building onions.

Ordinary onions have many varieties, good quality and large cultivation area. According to the length of the white onion, there are long white onion and short white onion. Long white onion white spicy flavor, famous varieties of Liaoning Gai Ping onion, Beijing high foot white, Shaanxi Hua Xian valley onion; short white onion white onion white short thick and fat, famous varieties of Shandong Zhangqiu chicken leg onion, Hebei's leaf onion, etc..

Split onion leaf color is thick, white onion white is pure white, spicy flavor is light, good quality.

The building onion white and sweet flavor, onion leaves short, quality is not good.

Hu onions are cultivated in the south, soft and mild flavor, mainly eating onion leaves.

Nutritional value

Scallions contain protein, carbohydrates and other vitamins and minerals, which are very beneficial to the human body.

1, antipyretic, expectorant. The volatile oil and other active ingredients of green onions have the effect of stimulating the sweat glands of the body to sweat and dissipate heat.

2, promote digestion and absorption. Onion also stimulate the body's digestive secretion, can strengthen the spleen and stomach, improve appetite.

3, antibacterial, antiviral. Allicin contained in the green onion, with obvious resistance to bacteria, viruses, especially dysentery bacilli and skin fungi inhibitory effect is stronger.

4, anti-cancer. Pectin contained in onions, can significantly reduce the occurrence of colon cancer, anti-cancer effect, onions within the allicin can also inhibit the growth of cancer cells.

5, scallions also have the effect of lowering blood fat, blood pressure, blood sugar: if eaten with mushrooms can play a role in promoting blood circulation.

Applicable people

The general population can be eaten, brain workers are more suitable.

Consumption of contraindications

1, gastrointestinal disease patients. People suffering from gastrointestinal diseases, especially ulcer disease, should not eat more.

2, table deficiency, sweating people should also avoid eating onions.

3, eye disease patients. Excessive consumption of green onions can also damage vision, so people with bad eyes should not eat too much green onions.

Nutritional composition

Each 100 grams of green onion contains 90 grams of water, 2.5 grams of protein, 0.3 grams of fat, 5.4 grams of carbohydrates, 54 milligrams of calcium, 61 milligrams of phosphorus, 2.2 milligrams of iron, 0.46 milligrams of carotene, vitamin C 15 milligrams. In addition, it also contains protopectin, water-soluble pectin, thiamin, riboflavin, niacin and allicin, and many other ingredients.

Baidu Encyclopedia: Scallion