Is it better to build greenhouses?

A: Actually not! Only in the specific operating environment and for special crops, it is necessary to build some large-scale greenhouses. It is a wrong trend for vegetable farmers to blindly expand the area of ​​the shed. Taking into account the regulation of the greenhouse environment, crop growth characteristics and economic benefits, the optimal scale of greenhouse construction is a span of 7 to 9 meters and a length of 60 to 80 meters. ,

When the greenhouse spans more than 9 meters, that is, when it is too wide, the height of the shed is reduced, which can lead to strong light at the front and poor ventilation. Crops are prone to pests and diseases. If it is completed, you can press the front part of the membrane appropriately to increase the degree of crown to facilitate ventilation; or put a layer of plastic film on the front of the third wire and press it against the top of the roof to avoid The front is changing rapidly. When the temperature is relatively high, the width of the air outlet can be appropriately increased to increase the air flow.

When the greenhouse is too long, it is not conducive to ventilation, especially when there is strong wind, the temperature of the greenhouse door is obviously lower than that of the shed, even after the outlet is shut off. At the same time, long greenhouses will inevitably cause inconvenience in agricultural operations. The distance to walk around is too large and it can easily lead to fatigue. If it has been completed, use a new plastic film to make a partition in the middle of the greenhouse, which can be directly tied to the column, but it must be passed through to the top of the greenhouse before it can reduce the air circulation on both sides.

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