At present, the planting of special, rare and precious green vegetables, in the domestic and international markets are relatively popular, some do not need to establish a greenhouse to grow, and the use of local solar greenhouse can still obtain considerable profits. For the cultivation of common vegetables, the local market is the main, it is appropriate to use simple greenhouses, can not arbitrarily increase the cost of planting, resulting in no market for the product.
Investments in greenhouse farming are risky. There is a certain time difference between greenhouse planting and the market. Once the product is not properly positioned, the greenhouse construction project is likely to fail halfway.
The market is changing, and the greenhouse is a fixed asset investment, with relative stability. The purpose of the greenhouse needs to be clarified. China's greenhouse construction started relatively late, and different regions have different understanding of greenhouse.
At present, the construction of many greenhouses is in the stage of government guidance and support, mainly by demonstration, social benefits, environmental benefits are relatively prominent, but the economic benefits are not ideal, there is a certain degree of comprehensive benefits.
For demonstration class of greenhouse, high-tech, high investment, high yield is the characteristic of this type of greenhouse, appropriate USES the current domestic greenhouse of international structure, new materials and planting form, the products should be geared to the needs of the national and international market, considering the social benefit and environmental benefit at the same time, especially must have significant economic benefits, at least in the local leader in the greenhouse effect, otherwise, the demonstration was a failure.
The form of a greenhouse is not important as long as it meets the needs of production. Plastic greenhouse simple structure, can be suitable for the majority of vegetables and fruits planting needs, and easy to operate, conducive to the promotion. As for the fully automatic control greenhouse, it is not suitable for most planting and breeding at present. It has high cost, complex system and high operating cost, and requires special personnel to maintain it. The operators are required to have quite high technical level, which is suitable for scientific research and the production and use of high value-added agricultural products.