How much do you know about the eight functions and functions of commonly used "ingredients" onions?

Onion is also called ball onion, Dutch onion, onion, is one of the commonly used dishes in cooking, is widely cultivated. In addition to the delicious side dishes, onions also have eight major effects and functions, do you know?

1. Onion growth environment and morphology

1. Onion suitable growth environment: onion strong adaptability to temperature, the need for a long time of sunshine, adequate water during the growth period, onion strong adaptability to soil, to fertile loose, good ventilation of neutral loam is appropriate, sandy loam easy to obtain high yield, but clay loam bulb enrichment, good color, storage resistance. Onion roots have weak ability to absorb fertilizer, so sufficient nutrient conditions are needed for high yield.

2. China's main onion producing areas: Jinxiang, Yutai, Shan County, Pingdu in Shandong Province, Feng County in Jiangsu Province, Jiuquan and Wuwei in Gansu Province, Yuanmou and Dongchuan in Yunnan Province, Xichang in Sichuan Province, etc.

3. Onion growth morphology: onion bulb thick, nearly globose; papery to thin leathery, thick endothelium, fleshy, leaves cylindrical, hollow, thickest below the middle, tapering upward, shorter than scape, scape stout, up to 1 meter high, umbel globose, with many and dense flowers; pollen white; tepals with green midvein, oblong ovate, filaments equal, ovary nearly globose, ventral suture base with curtain of concave honey holes; May-July flowering. We usually use underground fruits.

2. The efficacy of onions

1. Onion has the effect of dispersing wind chill, because onion bulbs and leaves contain a kind of oily volatile called propylene sulfide, which has spicy flavor. This substance can resist cold and influenza virus and has strong bactericidal effect.

2. Onions are rich in nutrients and have a spicy smell. it can stimulate secretion of stomach, intestine and digestive gland, stimulate appetite and promote digestion, and onion has no fat, and its essential oil contain a mixture of sulfur compounds capable of reduce cholesterol, and can be used for treating dyspepsia, anorexia and food stagnation;

Onions are the only ones known to contain prostaglandin A. Prostaglandin A can dilate blood vessels and reduce blood viscosity, thus lowering blood pressure, reducing peripheral blood vessels and increasing blood flow in coronary arteries to prevent thrombosis. It can resist the action of catecholamine and other pressor substances in human body, and promote the excretion of sodium salt, so as to reduce blood pressure. It has health care effect on hypertension, hyperlipidemia and cardiovascular and cerebrovascular patients.

4, onion has a certain refreshing effect, it can help cells better use glucose, while lowering blood sugar, supply brain cells heat, is diabetes, mental paralysis patients diet vegetables;

5, onion contains a kind of inflammation "quercetin" 9 substance, which is currently known as one of the most effective natural anti-cancer substances, it can prevent the biochemical mechanism in the body mutation, control the growth of cancer cells, thus having anti-cancer and anti-cancer effects;

6. The trace element selenium contained in onion is a strong antioxidant, which can eliminate free radicals in the body, enhance the vitality and metabolic ability of cells, and has the effect of preventing cancer and anti-aging;

7, onion also contains a certain amount of calcium, in recent years, Swiss scientists found that eating onions can improve bone density, help prevent osteoporosis;

8, onion contains phytocides such as allicin, etc., so it has a strong bactericidal ability. Chewing raw onions can ward off colds.

III. Taboo of onion

Do not eat with the following foods:

(1) Kelp: onion contains a lot of oxalic acid, kelp is rich in iodine and calcium, two kinds of food with a large number of food, easy to produce stones.

(2) honey: net onion and honey to eat together is not good for the eyes, and may even cause blindness, no matter how true or false, the two foods or do not eat well together.

(3) Shrimp: Onion and shrimp eat together in large quantities, calcium oxalate will be produced stones.

(4) Fish: Oxalic acid in onions will decompose and destroy the rich protein in fish, and will produce sediment, which will be difficult to digest and absorb.

(5) Soybeans: Eating onions and soybeans together will affect the absorption of nutrients in the body and reduce the nutritional value of the two foods.

The following groups should eat less or not eat:

(1) Patients with digestive diseases such as acute and chronic enteritis and diarrhea; patients with cardiovascular diseases such as diabetes, hypertension, hyperlipidemia and arteriosclerosis;

(2) Onion is hair, so skin itching diseases, eye diseases, stomach diseases, lung inflammation do not eat or eat less.

IV. Onion prices

1. At present, the price of red onion in Shandong is stable, with the price ranging from 0.15 to 0.25 yuan/catty.

2. At present, the price of red-skinned onion in Henan is relatively good, ranging from 0.27 to 0.35 yuan/catty.

Onion planting and management costs are small, yield per mu is high, market demand is large, and planting prospects are good.