1. The temperature in the shed mainly comes from solar radiation. The main production seasons are spring, summer and autumn. In areas where the winter temperature is above-15℃, some crops with strong cold tolerance can be planted, and stoves can also be used for temporary supplementary heating.
2. In order to improve the utilization rate of greenhouse, the greenhouse is often temporarily heated in early spring and late autumn, with two curtains for cold protection, a sunny shed in the greenhouse, a small arch shed or a middle shed, covered with plastic film, and the periphery of the greenhouse covered with grass curtains to prolong the growth period, increase the number of planting stubbles and increase the yield.
3. Heating the hot wire in the shed can also reduce the relative humidity. Using drip irrigation technology combined with plastic film mulching cultivation to reduce soil moisture evaporation can greatly reduce air humidity (about 20%).
4, conditional to use hot air or hot water pipe heating, exhaust gas after burning out of the shed.
Extended data:
The energy consumption of heating in winter is the main obstacle to the operation of greenhouse. Improving the thermal insulation performance of greenhouse and reducing energy consumption are the most direct means to improve the production efficiency of greenhouse. The heat preservation rate of greenhouse is a basic index to measure the heat preservation performance of greenhouse. The heat preservation rate of greenhouse refers to the ratio of the coverage area of transparent material with low thermal resistance to the sum of the coverage area of greenhouse envelope with high thermal resistance. The greater the insulation ratio, the better the insulation performance of the greenhouse.
The heat preservation performance of greenhouse is very good, and the heating energy consumption is the main obstacle to the operation of greenhouse in winter. Improving the thermal insulation performance of greenhouse and reducing energy consumption is the best way to improve the production efficiency of greenhouse.
Baidu encyclopedia-greenhouse