Common greenhouse heating methods include fire heating, hot water heating, steam heating and hot air heating. Which way is the most economical depends on the actual situation, but generally speaking, solar heating will save money. When heating greenhouses temporarily, household electric heaters can be used for heating, and large-area solar greenhouses and greenhouses or greenhouses built in residential areas with heating conditions can be used for heating.

First, the most economical heating method in greenhouse

1, commonly used methods for greenhouse heating include fire heating, hot water heating, steam heating, warm air heating and solar energy storage system heating. According to the different greenhouse areas and the actual situation, it is not entirely certain which way is the most economical. It is best to take measures according to the actual situation. Generally speaking, solar energy heating will save money.

2. When heating the greenhouse temporarily, you can also use a household electric heater to heat it. You can use an electric heater to blow to the southeast and southwest, and the radiating surface of the electric heater should be inclined upward 15-20? Don't blow fruit trees directly.

3. For large-scale solar greenhouses, greenhouses with heating conditions or greenhouses built in residential areas, heating can be used, or water can be sent to a boiler for heating, so that the water can be turned into steam, hot water or warm water, and then introduced into iron pipes or radiators in fruit tree greenhouses through conveying iron pipes for heating.

You can also use electric heating wire to heat the greenhouse. There are two ways of this method: ground heating (burying electric heating wires in greenhouse soil to raise soil temperature) and air heating. This method works well, but the cost is high.

Second, what technology and conditions are needed for shrimp culture in greenhouses?

1. Fill the pond with water for a week, and then spray it evenly with EM bacteria liquid diluted by 100-300 times and insect-proof liquid made from EM bacteria liquid to disinfect and purify the pond.

2. Spray the water surface with EM bacterial liquid diluent 3- 10 days before stocking. According to the water quality, spray 1 time on 15 days, and spray 1 time every 1 month thereafter. If the water quality is poor, the sprinkling time can be shortened appropriately. In order to spray evenly, the stock solution of bacterial liquid can be diluted before use.

3. Because the shrimp feed is granular, the bait can be sprayed with 200 times of EM bacterial liquid diluent. After the bait is sprayed wet, feed the shrimp immediately to avoid the bait spreading.

4. Organic fertilizer and manure to be put into water should be treated with EM bacteria solution before being put into water after fermentation.

5. In the process of breeding, groundwater should be replenished regularly, because groundwater is safe and rich in mineral elements, which plays an important role in alleviating the toxicity of nitrite in the middle and late stages.

6. Shrimp seedlings are released early in the greenhouse, and there will be a cold spring after they are released. It is recommended to equip a boiler for heating. It is also necessary to prepare an aerator to fully stir the water body for water transfer and aeration, and at the same time reduce the pollution of organic matter to the feeding area.