Grasp greenhouse insulation promptly and do a good job of cold protection management in time
Grasp greenhouse insulation promptly
First, set up a cold protection trench in front of the greenhouse. Dig a cold protection trench 40 cm wide and 50 cm deep at the front edge of the greenhouse, fill the trench with rotten grass, straw, etc., and cover it with plastic film. Setting up a cold protection trench in this way can cut off heat exchange between the inside and outside of the greenhouse, prevent the frozen soil layer from extending into the greenhouse, and is an important measure to slow the drop in ground temperature inside the greenhouse.
Second, stand corn stalks upright at the back wall of the greenhouse. For greenhouses with thin walls, when the weather is cold, a row of corn stalks can be stood upright along the back wall of the greenhouse, which can both protect the greenhouse body and play an auxiliary role in insulation.
Third, inspect the greenhouse in time, and seal any gaps immediately once they are found. Do not underestimate gaps at various positions in the greenhouse. These gaps exchange heat through convection with the outside air, causing heat loss, and have a great impact on vegetable growth. Data show that if the greenhouse entrance is not tightly blocked, it is equivalent to ventilating for 1 hour more than other greenhouses, and the harm caused to vegetables can be imagined. Therefore, inspect the greenhouse in time. First, check whether there are gaps in the greenhouse film and walls, and once any are found, they should be glued and blocked immediately. Second, pay special attention to closing the greenhouse door well. If there are gaps, plug them tightly with old plastic film, clothes, etc. It is best to also hang an insulation quilt at the greenhouse entrance to prevent cold wind from entering when the door is opened and affecting vegetable growth.
Fourth, increase the thickness of the straw mats. The thickness of the straw mats used on old greenhouses should be about 5 cm, and straw mats that are tightly woven with few gaps should be selected. Otherwise, if the straw mats are not tightly woven and show gaps, the insulation effect after covering the greenhouse will be extremely poor. After covering with straw mats, also add a layer of plastic film, which can both enhance the insulation performance of the greenhouse and prevent rain and snow from soaking the straw mats.
Second, stand corn stalks upright at the back wall of the greenhouse. For greenhouses with thin walls, when the weather is cold, a row of corn stalks can be stood upright along the back wall of the greenhouse, which can both protect the greenhouse body and play an auxiliary role in insulation.
Third, inspect the greenhouse in time, and seal any gaps immediately once they are found. Do not underestimate gaps at various positions in the greenhouse. These gaps exchange heat through convection with the outside air, causing heat loss, and have a great impact on vegetable growth. Data show that if the greenhouse entrance is not tightly blocked, it is equivalent to ventilating for 1 hour more than other greenhouses, and the harm caused to vegetables can be imagined. Therefore, inspect the greenhouse in time. First, check whether there are gaps in the greenhouse film and walls, and once any are found, they should be glued and blocked immediately. Second, pay special attention to closing the greenhouse door well. If there are gaps, plug them tightly with old plastic film, clothes, etc. It is best to also hang an insulation quilt at the greenhouse entrance to prevent cold wind from entering when the door is opened and affecting vegetable growth.
Fourth, increase the thickness of the straw mats. The thickness of the straw mats used on old greenhouses should be about 5 cm, and straw mats that are tightly woven with few gaps should be selected. Otherwise, if the straw mats are not tightly woven and show gaps, the insulation effect after covering the greenhouse will be extremely poor. After covering with straw mats, also add a layer of plastic film, which can both enhance the insulation performance of the greenhouse and prevent rain and snow from soaking the straw mats.