What are the advantages and disadvantages of greenhouse vegetables compared with open-air vegetables?

1. The seed selection procedure of "greenhouse vegetables" is stricter than that of "field vegetables", and high-quality seeds naturally breed high-quality products.

2. Growing vegetables in greenhouses is not limited by seasons and has the characteristics of breaking the time difference, spatial difference and geographical difference; However, under the influence of rainy weather, vegetables planted in the open air are threatened by high temperature and heavy rain in summer, and the yield and quality cannot be guaranteed.

Planting "greenhouse vegetables" is more beneficial than planting "field vegetables". In many rural areas, the "greenhouse vegetable" industry has become a new economic growth point and a new direction to adjust the rural industrial structure. But relatively speaking, greenhouse vegetables need the support of high technology and high investment to have high output.

4. The social demand for high-quality, pollution-free and pollution-free greenhouse vegetables continues to increase, and the demand for pollution-free greenhouse vegetables increases.

Extended data:

Matters needing attention in greenhouse vegetable planting:

1, and determine the reasonable planting time. The benefit of greenhouse vegetables depends largely on the planting time. Off-season vegetables are the period with the highest benefit around spring, so the planting time should be determined as the period with the highest yield around spring.

From one crop a year to 70% crops a year now, the planting cycle is roughly as follows: the planting cycle of one crop a year is1mid-October, and the planting cycle of two crops a year is: one crop is in mid-July, and the second crop is1mid-February to the following year. This planting time is more cost-effective.

2. Select high-yield and disease-resistant varieties. Improved varieties are the internal cause of increasing production. High-yield cultivation techniques can not be separated from improved varieties at first. Using greenhouse to grow out-of-season vegetables depends on sufficient light and heat resources, mainly planting tomatoes, cucumbers, eggplant, peppers, beans, melons and other major types of vegetables and fruits. Selecting excellent varieties will generally increase the yield by 10% ~ 20%, and the benefit will increase by more than 10%.

3. Reasonable shed type. There are five types of greenhouses. When planting vegetables, you should choose the type of greenhouse according to the different requirements of vegetables for temperature, or determine the type of vegetables according to your own greenhouse type. Only in this way can we obtain the ideal yield of vegetables.

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