Storage conditions of Chinese cabbage, Chinese cabbage is a very common vegetable food, which is rich in nutrients needed by human body. Eating cabbage properly also has many benefits. If you want to eat cabbage and keep it from going bad, you should pay attention to the following storage conditions.
The storage condition of Chinese cabbage 1 ensures the integrity of Chinese cabbage.
If you want to temporarily store the cabbage in front of you, you'd better not cut it. Some people often store half or incomplete cabbage for convenience, so it is easy to lose vitamin C in vegetables, not to mention it is easy to deteriorate from the beginning of cutting. If you have to store half of the cabbage, wrap it tightly in a plastic bag and put it in the refrigerator.
Freezing and using fresh-keeping bags
In order to prevent drying deterioration and maintain the nutrition and refreshing taste of Chinese cabbage, it can be wrapped in plastic wrap and stored in the refrigerator. The storage time is up to two weeks. But if you buy wrinkled olives, eat them within a week, and don't leave them longer.
Eat sequentially from the outer layer.
Cut it obliquely from the root to the core with a knife, and then eat it layer by layer from the outside to the inside. It is easy to peel off the skin without cutting. This can keep the cabbage fresh and nutritious all the time.
Peel off dead leaves in time.
If a part of Chinese cabbage is withered and moldy, peel it clean before storage, otherwise it will easily lead to deterioration of other parts, and finally make the whole Chinese cabbage inedible.
Introduction of cabbage
Chinese cabbage (Brassica oleracea L., var, capitata L.) is a variety of Brassica in Cruciferae. Also known as Chinese cabbage, cabbage, pimple white, cabbage, cabbage, lotus white and so on. Biennial herb covered with powdery frost. Short and stout annual stems are fleshy, unbranched, green or grayish green.
Basal leaves are many, thick, layered into spheroids, oblate, with a diameter of more than 10-30 cm, milky white or light green; Westerners who originated from the Mediterranean coast were introduced to Japan by land and sea in the16th century. In order to encourage people to eat it widely, the Japanese government transliterated it into cabbage according to English coleslaw (actually it has nothing to do with Korea), and then spread it from Japan to China and the Kingdom of Korea. Chinese cabbage has the characteristics of cold resistance, disease resistance, strong adaptability, easy storage and transportation, high yield and good quality. Widely cultivated in China, it is one of the main vegetables in northeast, northwest and north China in spring, summer and autumn.
About 90% of the ingredients are water, which is rich in vitamin C and ranks third among the best foods recommended by the World Health Organization. Cabbage, commonly known as cabbage, is called a knot in one's heart in the northeast. Chinese cabbage, green vegetables and bumps are three kinds of vegetables. The pimples on my head taste a little spicy. Vegetables look like pimples, but they are not spicy. Chinese cabbage is flatter than the other two from the side, and the other two are bulging than Chinese cabbage from any angle [1].
Biological characteristics of cabbage
Botanical characteristics
Chinese cabbage is a biennial herb, and its roots are mainly distributed in the soil layer within 30cm. Stem shortening is divided into inner shortened stem and outer shortened stem. Cauline lotus leaf with shortened outer part and cauline bulbous leaves with shortened inner part. The leaves of cabbage include cotyledons, basal leaves, seedling leaves, lotus leaves and bulbous leaves. The leaves are dark green to green, smooth and fleshy, and there is powdery wax on the leaves, which can reduce water transpiration, so Chinese cabbage has stronger drought resistance than Chinese cabbage.
Flowers are racemes, cross-pollinated, and all varieties and varieties of cabbage cross each other. The fruit is silique, the seeds are spherical, reddish brown or dark brown, and the 1000-grain weight is about 4g.
Continuously develop
In general, Chinese cabbage seeds are harvested in autumn in the north. In the first year, the leaf bulb is formed to complete the vegetative growth, the vernalization is completed at low temperature in winter, and the photoperiod is completed with long sunshine in the next spring to make it blossom and bear fruit.
Its growth process is basically the same as that of Chinese cabbage. However, the days required for each growth period are longer, and the germination period needs 8- 10 days. The seedling stage is 25-30 days; The cluster stage is 20-25 days for early-maturing varieties and 30-35 days for middle-late-maturing varieties; Heading stage takes 20-25 days for early-maturing varieties and 30-50 days for mid-late-maturing varieties.
Cabbage is a kind of crop that grows vigorously in winter. The transition from vegetative growth to reproductive growth requires strict environmental conditions. It requires seedlings to grow to a certain size before they can be induced by low temperature, and vernalization can be completed in 50-90 days at 0- 12℃. Regarding the photoperiod, the varieties of pointed and flat heads are not very strict, and the varieties of ballpoint pens require long sunshine.
After entering the reproductive growth period, it usually goes through bolting, flowering and fruiting. The flowering period is 30-40 days, and the fruiting period is 40-50 days.
Before heading, Chinese cabbage meets the requirements of vernalization at low temperature or seedling stage. Once the long sunshine condition is met after planting, it may appear "immature bolting" phenomenon, which hinders the formation of leaf bulbs and reduces the yield. In recent years, raising spring cabbage in improved greenhouse or plastic greenhouse not only avoids low temperature, but also greatly shortens the seedling raising period, which has a good effect on preventing immature bolting and ensuring early maturity and high yield.
What are the benefits of eating cabbage?
The scientific name of Chinese cabbage is cabbage, also known as cabbage, cabbage and lotus white, which belongs to one kind of Chinese cabbage. Cabbage tastes fragrant, crisp and tender, and can be eaten in all seasons. It is one of the main vegetable varieties. Cabbage originated from the Mediterranean coast and evolved from wild cabbage that does not bear balls. Cabbage first appeared in Europe in the13rd century, and was introduced to China in the16th century. Chinese cabbage has a high status abroad, just like Chinese cabbage in China.
How to buy Chinese cabbage with hard and dense leaves, no matter what season and variety. Fresh-keeping and storage of cabbage can be put in a fresh-keeping box with vegetables and stored in the refrigerator for a week.
Nutrients Cabbage is rich in nutrients and can be eaten raw or cooked. Delicious taste and diverse functions. The content of vitamin C in Chinese cabbage is very high, which is twice that of Chinese cabbage. Besides, another advantage of Chinese cabbage is that it is rich in folic acid.
Cabbage contains many essential amino acids, as well as vitamin U, carotene, vitamin B 1, vitamin B2, nicotinic acid and protein, fat, potassium and calcium. According to the analysis, every 100g of Chinese cabbage contains protein 1 and 1g, fat 0 and 2g, carbohydrate 3 and 4g, crude fiber 0 and 5g, calcium 32mg and vitamin C4 1mg.
Medicinal Efficacy Chinese medicine believes that Chinese cabbage is mild, sweet and non-toxic, and has the effects of nourishing marrow, benefiting joints, strengthening bones and muscles, benefiting five internal organs, regulating five internal organs, clearing away heat and relieving pain.
1, fresh Chinese cabbage contains phytoncide, which has antibacterial and anti-inflammatory effects. Sore throat, traumatic swelling and pain, mosquito bites, stomachache and toothache can all be helped by cabbage.
2. Cabbage contains a certain amount of vitamin U, which can protect mucosal cells. Its fresh juice can treat gastric and duodenal ulcers, relieve pain and promote healing.
3, eating cabbage regularly has a cosmetic effect on the skin, which can prevent skin pigmentation, reduce freckles of young people, and delay the appearance of age spots.
4. Traditional medicine believes that cabbage is flat and sweet, can strengthen the spleen and kidney, dredge collaterals and strengthen bones, and eat more cabbage, which can stimulate appetite, promote digestion and prevent constipation. Modern research has found that Chinese cabbage contains indole substances, which can inhibit and prevent cancer, especially breast cancer. Chinese cabbage contains enzymes that can decompose ammonium nitrite, which has certain anticancer effect.
5. Cabbage is rich in anti-aging antioxidants, which can improve immunity and health.
6. Cabbage can also prevent alcoholism.
How to eat cabbage
Edible method
There are many ways to eat Chinese cabbage, which can be fried and boiled, but the time of frying and boiling should not be too long to reduce the loss of vitamin C. It can also be shredded and cold, and can also be made into pickles and dried vegetables.
Adaptive quantity
It is advisable for middle-aged and elderly people to eat 50 ~ 60 grams of cabbage every day.
Storage conditions of Chinese cabbage 2 Can Chinese cabbage be frozen?
If you want to store cabbage for a short time, it is recommended not to cut it with a knife. I believe many people have this habit. It is actually wrong to put leftovers or half a cabbage in the refrigerator. It will accelerate the loss of vitamin C in cabbage and may lead to deterioration. If you really want to refrigerate some cabbages, you can wrap them in plastic bags and put them in the refrigerator. Cabbage in our life can actually be frozen quickly, but we must pay attention to the freezing method. Let's look at the correct method.
If you want to keep it for a long time, we can wrap the cabbage in paper and put it in the refrigerator. It's no problem to store it for a month or two. The taste may be a little different, but it won't go bad. Another way is to choose fresh-keeping bags for storage. Tear off the newly bought cabbage piece by piece, and then put it in a fresh-keeping bag and seal it. Remember to keep your mouth shut for a week.
We must pay attention to the choice of cabbage. If we buy some withered or moldy cabbages, we can't put them in the cold storage. This is highly contagious, and it is easy to cause other good parts to deteriorate, which will ruin the whole cabbage. When cleaning, you can choose rice washing water to clean cabbage, and it is recommended to soak it in rice washing water for 10 minutes or more.
Storage conditions and nutritional value of cabbage 3 1
Among the best foods recommended by the World Health Organization, Chinese cabbage ranks third, followed by sweet potato and asparagus. An adult can meet 50% of the daily vitamin C requirement by eating 2-3 pieces of cabbage every day.
Cabbage is not only rich in vitamin C, but also contains more folic acid, which is an important drug to prevent and treat anemia. Compendium of Materia Medica holds that Chinese cabbage "benefits joints" and "strengthens bones" is not out of nothing, because Chinese cabbage is rich in vitamin A, calcium and phosphorus, which can promote bone development and prevent osteoporosis, and is very beneficial to children's growth and development and bone health care for the elderly.
Moreover, the amino acids lysine and tryptophan contained in Chinese cabbage have a good effect on the development of children and the prevention of Alzheimer's disease.
Cabbage is really suitable for all ages! Therefore, Japanese scientists believe that the anti-aging and antioxidant effects of cabbage are at a high level with asparagus and cauliflower. You can get vitamins A, B 1, B2, C, E, calcium, phosphorus, iron, potassium, selenium and other nutrients by drinking cabbage soup regularly, so you don't have to eat various health products.
Cabbage also contains a special ingredient-vitamin U-like factor. Vitamin U can promote the healing of gastric and duodenal ulcers, and it can synthesize protein to repair the damaged gastrointestinal mucosa. The effect of natural vitamin U is far more than that of synthetic vitamin U. Cabbage contains a lot of crude fiber, which has a good laxative effect and can also prevent fatty liver caused by excessive liver fat deposition, which is very beneficial to beauty and weight loss.
People pay more and more attention to the anti-cancer effect of Chinese cabbage. Because Chinese cabbage also contains more trace element molybdenum, it can inhibit the formation of nitrite glue and has certain anti-cancer effect; Pectin and a large amount of crude fiber in cabbage can combine and prevent the absorption of intestinal endotoxin, promote defecation and prevent intestinal cancer; Indoles and diphenols in Chinese cabbage can inhibit the growth and reproduction of cancer cells. According to relevant data, eating more cabbage can reduce the incidence of bladder cancer by 40%.
Cabbage plays an important role in protecting human health. Li Shizhen, a great doctor in the Ming Dynasty, praised the great vitality of Chinese cabbage: "It is sweet to cook, it will not die in winter, and there will be English in spring."
Cabbage can be eaten raw, with juice, and of course it is more cooked. However, there are two tips for frying cabbage. First, it is best to use olive oil for cooking, because with the help of this unsaturated oil, all kinds of fat-soluble vitamins contained in Chinese cabbage can be fully absorbed and utilized by the human body. Second, because Chinese cabbage contains sulfide, it is best not to cover the pot when cooking, which will release a lot of volatile molecules.
Although Chinese cabbage is rich in nutrition, it is hard because it contains a lot of crude fiber, and people with deficiency of spleen and stomach and loose stools should not eat it for the time being.
2. Precautions for eating cabbage
1, Chinese cabbage contains a lot of crude fiber, which is hard, and people who are prone to spleen and stomach deficiency and diarrhea should not eat more.
2. People who have had abdominal or chest surgery and people with severe gastric ulcers should not eat more when they have diarrhea.
3. People with itchy skin and bloodshot eyes should not eat it.
It is best to eat Chinese cabbage raw or cooked for a short time, because the benefits will be reduced if it is cooked for a long time.