Whether the shed is built as large as possible, the details are as follows:
Actually not! Only in certain operating environments and planting crops, it is necessary to build some large greenhouses. It is a wrong trend for vegetable farmers to blindly expand the shed area. Taking Shouguang City as an example, considering the greenhouse environmental regulation, crop growth characteristics and economic benefits, the optimal scale for greenhouse construction is 7-9 meters span and 60-80 meters in length.
When the span of the greenhouse exceeds 9 meters, that is, when the width is too wide, the reduction of the shed surface can result in excessive light in the front and poor ventilation, and the crop is prone to pests and diseases. If it has been built, the front part can be appropriately pressed down during the film change to increase the degree of camber for ventilation; or a layer of mulch is attached to the front part of the third wire, and the top of the shed is pressed down to avoid the front. The Ministry raised and lowered rapidly. When the temperature is relatively high, you can increase the width of the vent to increase the amount of air.
When the greenhouse is too long, it is not conducive to ventilation and ventilation. Especially when there is strong wind, the temperature at the shed door is significantly lower than that at the shed, even after the vent is closed. At the same time, the length of the greenhouse will inevitably cause inconvenience in the operation of farming, and the distance between the front and the back is too large, which is easy to cause fatigue. If it has been built, use a new plastic film to make a partition in the middle of the greenhouse, which can be directly attached to the column, but it must be directly connected to the top of the greenhouse to reduce the air circulation on both sides.
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