Why can I eat greenhouse vegetables all year round?

Grow vegetables in greenhouses

In northern China, the temperature drops rapidly in autumn, especially in winter, when the soil gradually freezes, and outdoor plants cannot be planted for 5 to 6 months. Technology solves this major problem. Through greenhouse cultivation and other methods, fresh vegetables can be produced in northern China in winter.

From 2006 to 2016, China's facility vegetable area increased by an average of about 1.6 million mu per year, close to the area of Los Angeles.

Today's facility vegetables are no longer simply "greenhouses", but through science and technology to improve the vegetable production environment, such as through the intelligent system of automatic irrigation, ventilation equipment, and monitoring of light, heat, pests, etc. Some of China's most important vegetables come from facility cultivation, with a total annual output of nearly 300 million tons and a value of more than $100 billion.

China has also established six major vegetable producing areas according to different geographical climates, so that at least three producing areas can produce vegetables in each season, so as to meet the vegetable demand of the whole country. China is the most populous country in the world, but its per capita consumption of vegetables has reached the highest level in the world. The growth of vegetable production is due to multiple factors, on the one hand, through legislation and other ways to ensure the land area for agricultural production, resolutely prohibit the use of these land to build houses or other purposes, the most important thing is that scientific and technological progress has promoted the continuous increase in China's vegetable yield.

There are more than 10,000 vegetable varieties registered in China, and by strengthening the breeding of vegetable varieties and improving breeding methods, China's vegetable varieties are of higher quality, disease resistance and high yield, especially suitable for facility cultivation. On saline-alkali land, the improved coconut white yields 2,000 kg per mu per year, and more and more vegetable varieties can also be planted.

There are several points to pay attention to when growing vegetables in greenhouses:

1. The requirements for light should be lower, because the weather is cold, the sunshine in winter is not long, and the greenhouse itself will also block some sunlight, so the varieties of vegetables must not require high sunlight.

2. Vegetable varieties should have a high survival rate and strong resistance to stress, because in winter, the greenhouse is kept closed and insulated. Humidity tends to be very high and it is easy to get sick. Therefore, resistant vegetable varieties are needed.

These are just some of the many growing techniques when it comes to greenhouse vegetable growing techniques.

To sum up: because of the development of science and technology, the planting technology of vegetables is becoming more and more advanced, and in China, fresh vegetables can be eaten all year round.

Because the temperature control of the greenhouse is very good, the land control is very good, and it is very suitable for the growth of some plants, so you can eat greenhouse vegetables all year round.

Because the temperature of the greenhouse is relatively high, it will not affect the growth of crops, and the annual yield is relatively high.

Because of the development of science and technology, people have developed ways to grow vegetables in winter, so that they can eat vegetables all year round.

Seasonal vegetables refer to the vegetables that are ripe in the season and marketed in the season, while greenhouse vegetables refer to the varieties cultivated in the greenhouse using high-tech hail technology. If you compare the two, it is natural that seasonal vegetables are betterSeasonal vegetables contain twice as many nutrients as greenhouse vegetables, and the antioxidants in seasonal vegetables are also higher, less polluting, and have a better taste.

Benefits of seasonal vegetables.

Seasonal vegetables are vegetables that grow and ripen naturally, grow naturally according to the sunlight and planting time required by the vegetables, and are the freshest and have the best taste. Tomatoes, for example, ripe tomatoes in summer have about twice as much vitamins and nutrients as in winter and taste more delicious than in winter. Seasonal vegetables contain more antioxidants, which can effectively prevent bowel cancer, myocardial infarction, Alzheimer's disease and other diseases.

Seasonal vegetables are marketed in large quantities in the season, which is not only fresh but also cheap.

Greenhouse vegetables. Greenhouse vegetables are cultivated using greenhouse cultivation technology, so that even in the cold winter, we can eat vegetables unique to summer. In people's perception, out-of-season vegetables use a lot of hormones and pesticides, which is not good for health.

There is some truth in this statement, some black-hearted merchants, in order to make fruits and vegetables ripen quickly, will use hormone drugs to ripen them, and often eat such vegetables, which is not good for human health.

However, greenhouse vegetables are not simply ripened by hormone drugs, it mainly relies on greenhouse planting to increase the temperature of crop growth, change the growth environment, and allow plants to mature in advance. As long as the cultivation process is in line with national standards, the quality is not much different from the vegetables listed in the normal season, but the planting cost is higher, so it is more expensive.

Greenhouse vegetables are relatively safe, but when buying greenhouse vegetables, you must learn to distinguish the quality of vegetables, otherwise it is very likely to buy hormone-ripened or vegetables containing excessive pesticides and fertilizers. From the point of view of taste and nutritional value, it is healthier to eat seasonal vegetables.

I think it's better to eat seasonal vegetables when you are too close to the season, and they are rich in nutrients; Because seasonal vegetables do not have too many pesticide residues and will not cause harm to the human body, and can provide the nutrients needed by the body on time, the compound season meets the body's nutritional needs.

It must be the best seasonal vegetable bush leakage, seasonal vegetables belong to seasonal food, grow in accordance with the season, and have a great help effect on the health of the human body. Greenhouse vegetables are the crops that have been produced in the market in recent years.

I think it's good to eat seasonal vegetables, because the nutritional value of seasonal vegetables is very high, and it can also enhance our resistance, and it can also enhance our immunity, so we must pay attention to the questions of this large acre of noodles.

January: greens, cabbage, spinach, celery, radish, mushrooms, etc.

February: greens, cabbage, spinach, celery, cabbage, etc.

March: greens, spinach, celery, cabbage, cauliflower, leeks, etc.

April: greens, lettuce, chicken hair, celery.

May: greens, cabbage, lettuce, chicken hair, cucumbers, broad beans, coconut white, tomatoes, etc.

June: cabbage, cucumbers, tomatoes, potatoes, chicken hair, sword beans (Phaseolus vulgaris), eggplant, pumpkin, etc.

July: cowpeas, eggplant, chicken hair, cabbage, winter melon, loofah, edamame, peppers, potatoes, lentils, Zenling cabbage, water spinach, etc.

August: winter melon, cowpea, eggplant, greens, chicken hair, pumpkin, loofah, edamame, pepper, sedan potato, lentils, cabbage, water spinach, etc.

September: greens, winter melon, radish, loofah, edamame, cowpea, eggplant, pepper, taro, callus, cabbage, lentils, etc.

October: greens, cabbage, spinach, celery, radish, taro, callus, cauliflower, chrysanthemum, lettuce, cauliflower, etc.

November: greens, cabbage, spinach, celery, radish, lettuce, cauliflower, shepherd's cabbage, grass, lettuce, mushrooms, green garlic, etc.

December: greens, cabbage, cabbage, celery, radish, cabbage, shepherd's cabbage, mushrooms, cauliflower, etc.

Choose the time to plant vegetables according to the season, vegetables suitable for planting in spring greenhouses: spinach, baby greens, amaranth, lettuce, eggplant, cucumber, water spinach, leeks, sweet potato vines, chrysanthemums, peppers, tomatoes, loofahs, winter melons, pumpkins, cowpeas, bitter gourds, watermelons, lentils, fungus Vegetables sown in summer: water spinach, watercress, cauliflower, oily lettuce, cucumber, winter melon, pumpkin, watermelon, vegetable melon, bitter gourd pepper Autumn planted vegetables:

Spinach, cauliflower, garlic, coriander, cabbage, kraft, green onion, lettuce, lettuce, celery, pea sprouts. Vegetables grown in winter: greens, choy sum, spinach, lettuce, coriander, lilies, mustard greens.

It can be planted all year round, baby cabbage, green onions, garlic.

Of course, it is best to eat seasonal vegetables, I generally buy vegetables I will buy vegetables that should be bought in this season to eat, if it is a greenhouse vegetable then I do not recommend it, after all, the vegetables in the greenhouse vegetables are out of season, such vegetables may be harmful to our body, if you eat more, you should usually eat more seasonal vegetables.

It is better to eat seasonal vegetables. Because seasonal vegetables are rich in vitamins, minerals and dietary fiber.

I think it's all good, because seasonal vegetables are seasonal, and greenhouse vegetables are cultivated artificially, and their nutritional value is the same.

In modern society, the dependence of peasants on "watching the sky and eating" has been greatly reduced. In the past, when farmers experienced severe flooding, they had to find another way out. Growing vegetables in a greenhouse is one way to protect against natural disasters.

It is also a popular project in rural areas. Even in winter, vegetables can be grown in the summer, the income of the farmers is guaranteed, and there is delicious food on the tables of the city. Agricultural production is increasingly inseparable from greenhouses.

The greenhouse can not only resist natural disasters and drought and flood disasters, but also can be cultivated in the morning and evening, prolong the growth period of crops, and achieve the purpose of early maturity, late maturity, increased yield and stable yield, which is welcomed by farmers.

However, with the passage of time, there are also some problems that are difficult to overcome when growing vegetables in greenhouses, such as competitive pressure, soil problems, etc., and some growers even have losses, and the gains outweigh the losses.

1.Soil problems.

Compared with the vast land of heaven and earth, greenhouse agriculture is not as good as expected. Since the seeds are sown on a plot of land every year, slow fertilization can affect the quality of the land. Without sunlight, the land will be degraded and will not be able to keep up with the demand for land for vegetables.

After years of invasion of fertilizers that have accumulated in the land, the quality of the vegetables has become worse and worse. Some farmers grow in greenhouses, and at first, they still have some harvest, and then slowly become unable to make ends meet.

2.Technical issues.

Although many relevant experts have come to the countryside to popularize greenhouse planting technology, farmers' ability to understand is limited. Most of them become farmers because they have a low level of education, or they are not educated. Farmers don't regulate the temperature in the greenhouse, and the vegetables grow worse and worse.

There are even some high-end technologies that farmers don't know how to use. The answers of the experts are too complicated, and the farmers do not listen to the lectures. Greenhouse farming is becoming more and more difficult and complex.

3.Competitive pressures.

Chinese peasants are very simple and simple peasants. Their most important purpose is to earn money to support their families. Because they don't have a long-term vision of the market, they are always short-sighted when observing the market, and they follow what vegetables others grow to make money.

When vegetables are harvested, there are often more vegetables in the market and fewer vegetables, resulting in an imbalance between supply and demand, and vegetables become lower and lower.

To sum up, growing vegetables in greenhouses has both advantages and some drawbacks. In fact, as long as you master the basic skills and have a long-term vision, it is still possible to succeed.

I think it's because the greenhouse vegetables can be of good quality, but there are disadvantages, such as not having enough light.

Greenhouse vegetables solve the contradiction between supply and demand of fresh and fine vegetables in winter in northern China, and provide an effective way for the adjustment of rural industrial structure and farmers' prosperity. However, the temperature of the greenhouse is high, which is not conducive to the degradation of pesticides and is easy to cause pesticide residues.

This is because agriculture is developing very fast, and at the same time, a lot of vegetables can be grown in greenhouses, which of course has disadvantages, because this is likely to affect the yield.