According to the market conditions, the profit of vegetable farming in greenhouses is around 150%. That is to say, in a year of 3-4 seasons of vegetable cultivation, the farmer or investor in the 1-2 period of the basic cost recovery, in the 3-4 period has begun to profit. Assuming only one acre of land, a period of vegetables can be harvested 5,000 pounds, the purchase price of 2 yuan per catty, then a year according to the calculation of three seasons, the total turnover of 30,000 yuan, excluding the cost of the annual profit should be in the 18-20,000 yuan or so. General vegetable greenhouse skeleton needs about 5500 yuan per acre. In order to save costs and extend the use of greenhouses, a more economical way to build greenhouses is to use magnesium greenhouse skeleton and plastic paper, which reduces construction costs and facilitates daily use and maintenance. This type of greenhouse can be used for 5 years and only the plastic paper needs to be replaced each year. The annual cost of vegetable seedlings, pesticides and fertilizers per mu is about 700 yuan, and the land lease fee is about 800 yuan per year. Combined with the above calculations, the initial cost of greenhouse vegetable planting per acre of land is about 7,000 yuan, vegetable greenhouses used for 5 years, the average annual cost per acre of land is about 2,500 yuan. The profit of greenhouse vegetable planting can reach 150%-250%, and it can produce 2-3 seasons of vegetables every year. If planting ordinary vegetables, 1-2 seasons can basically recover the cost of pre-construction and greenhouse vegetable management, so that the first year can realize profit, the average profit of 100%-150%. Subsequent years of annual expenditure is to replace some plastic paper. Extended information:Greenhouse vegetables planting methods 1. Do not apply a large number of undecomposed cake fertilizer to greenhouse vegetables. Because of the cake fertilizer carbon nitrogen ratio is small, decomposition is fast, local easy to produce high temperature and high concentration of ammonia and organic acid, easy to burn the root. Cake fertilizer should be broken up, soaked in human urine for about 3 weeks, fermented at high temperature before use. 2. Greenhouse vegetables should not be fertilized under drought conditions. Vegetables are water-loving crops. When the soil is dry, fertilizer application not only can't give full play to the fertilizer effect, but also makes the soil solution concentration rise suddenly, and vegetables are easy to burn the roots. Therefore, vegetable fertilization should be combined with irrigation, open furrow fertilization, bury the fertilizer tightly before irrigation, or follow the fertilizer along the water.3. Winter vegetable greenhouses should not apply more phosphorus fertilizer and zinc fertilizer. Vegetables lack of zinc, foliar spray 0.05%-0.2% zinc sulfate solution + new high fat film can be. 4. Be careful not to apply iron fertilizer to the soil. Because iron is easy to be fixed by the soil, transformed into insoluble compounds, lose fertilizer effect. Iron is not easy to flow on the leaves, but should be sprayed on the leaves. You can use 0.1%-0.3% ferrous sulfate solution + new high fat film evenly sprayed on the vegetable leaves. 5. winter vegetable greenhouse do not apply rare earth micro fertilizer directly into the soil. Vegetable foliar spraying 0.05%-0.07% rare earth micronutrient fertilizer solution + new high fat film can be.