As we all know, compared with other vegetables, zucchini has a lower temperature requirement. Generally, it is suitable for daytime shelf temperature 20°C-24°C and night shelf temperature 12°C-14°C. However, the weather is fine in winter this year, the temperature inside the shed is high, and it is even more necessary to cool the ventilation. The temperature in the greenhouse during the daytime can also be regulated by air release. At night, as the greenhouse covers the straw curtain, it is very difficult to let the air out. In this case, the vegetable farmers also let it be natural. It is precisely due to the neglect of the night temperature regulation by most vegetable farmers that led to the current husk of many squashes in the greenhouse, flowering fruit set rate is low, and even flowering and fruit drop phenomenon. Thus, it is imperative to do a good job of regulating the night temperature in the greenhouse. So what should be done in production? The reporter summarized the following points for reference by farmers.
The first is to put the straw curtain in the evening. When putting the straw curtain, it is appropriate to delay the time, and when the temperature of the shelf falls to 12°C, we must put grass and weeds again, because after we put the straw and weeds, the temperature of the canopy will usually rebound 2-4°C. This just reaches the most needed for the zucchini. Good temperature.
The second is not covered by floating membranes. When the weather is fine, the floating membrane is not covered at night, and the insulation of the greenhouse can be avoided. The temperature of the greenhouse is too high. However, in the event of rain or snow, the floating membrane must be covered at night to prevent rain and snow from wetting the grass.
Third, night ventilation cooling. If the above measures are taken, the night temperature cannot be lowered, and the ventilation and cooling can be performed at night. There are two ways: one is to put down the straw curtain at night without closing the air outlet on the greenhouse, so that the heat inside the greenhouse can still be distributed through the air outlet; second, the straw curtain at the front face of the greenhouse should not be put to the end. Leaving a small seam on the ground is also very significant in reducing the night temperature in the shed.
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