What are the advantages of greenhouse planting vegetables over traditional planting in terms of vegetable production?

Recall more than a decade ago, people in the north into the winter can eat very few fresh vegetables, basically the old three, turnips, cabbage, potatoes, but in recent years we find that we can eat fresh vegetables throughout the year, thanks to the development of greenhouse vegetables that is, the development of anti-seasonal vegetables, then there is a lot of questioning on the Internet greenhouse vegetables whether the safety of the problem, today I give you a collation and analysis.

One, what is greenhouse vegetables

The greenhouse vegetables are vegetables grown on the greenhouse covered with plastic film. Can artificially control the vegetable market season. The use of greenhouses covered with plastic film planting vegetables, is to artificially create a suitable ecological environment, adjust the season of vegetable production, regulate market demand, promote high quality and high yield of vegetables, is one of the effective means to increase the income of farmers.

Two, the advantages of greenhouse vegetables

1, the biggest advantage of greenhouse vegetables is that you can think of creating a suitable climate to provide anti-seasonal vegetables, which completely solved the situation of relying on the sky to eat vegetables, especially in the northern region of the people in the winter with fresh vegetables, which is the most important place in China's current vegetable security.

2, greenhouses can isolate insects and other, dust, acid rain and other damage to vegetables.

3, improve the yield and quality of vegetables, increase the income of growers.

3, greenhouse vegetables questioned? The safety of greenhouse vegetables

In fact, the questioning of greenhouse vegetables is mainly reflected in the planting, mainly in the following three aspects.

1, fertilizer damage. In fact, it is the accumulation of salt damage, the main reason is the partial application of chemical fertilizers or excessive fertilization to produce salinization of the soil. Fertilizer damage occurs after the problems that arise, one is to inhibit the development of the root system of vegetables, weakening the function of water and fertilizer absorption; two is the concentration of soil solution is too large, the vegetable strain reverse osmosis phenomenon, resulting in physiological wilting or leaf edge scorching; three is into the development of toxic gases hazards; four is to trigger the vegetable deficiency disease.

2, drug damage. There are obvious drug damage, symptoms are obvious. There are hidden drug damage, symptoms latent or delayed until the next crop of vegetables. The reason for the damage, one is the selection of pesticide varieties are not the right way or misuse of herbicides; the second is the concentration of the application is too large; the third is the purchase of poor-quality pesticides; the fourth is not to avoid the high temperature of the application of medicine. After the occurrence of drug damage, some vegetable leaves quickly lose green; some produce scorched spots, perforation; some of the leaves, flowers, fruits or deformities; the most serious whole plant withered.

3, continuous crop disorder. Is in the same greenhouse, year after year or season after season planted the same category or the same kind of vegetables, and yield and product quality decline year after year. The reason for the obstacle, one is the same kind or the same kind of vegetables favor a certain nutrient element, this kind of element supplementation is not timely and easy to appear deficiency disease; two is the accumulation of soil pathogenic bacteria triggered by disease caused by dead seedlings, such as wilt, wilt and yellow wilt; three is the same vegetable root secretion of material easy to lead to the structure of the soil microbial community is out of balance, caused by the aging of the soil.

What we say the above three styles of in the natural field planting will also appear the above problems, so we should pay attention to the following matters when planting.

To balance the fertilization, to promote the steady growth of vegetables.

Once again, the scientific use of drugs to ensure the safety of vegetables. First, the occurrence of minor drug damage, available to strengthen the fertilization management approach to restore the normal reproductive function of vegetables; second is to select the right pesticide counterparts, especially herbicides should be used with caution; third is to hold the pesticide dosage, concentration level, while avoiding the repeated use of a pesticide; fourth is to avoid mixing pesticides at will; fifth is the application of pesticides to avoid high temperatures; sixth is the application of herbicides must be cleaned after the instrument to be reused