Talking about the experience of greenhouse planting

    In even cloudy days, I often see some vegetable farmers standing on the roof of the shed and looking around. It turns out to see if people pull the shed (pull the grass curtain), see if they have the wind, and see if they have covered sheds..., this is enough to see. When it is cloudy, the management of vegetables in the shed is irregular, so some vegetable farmers are not sure about the many agricultural operations of the shed vegetables, and do not know what to do.

    One of the experience: If the weather is gloomy and there is no sign of the sun during the small cold and the severe cold, should you pull the tent at this time?

    If there is no frost and snow, you should promptly open the grass curtain (as the saying goes, the cloudy sun is a hundred times stronger than a light bulb). Another thing is to see whether the frost and snow will melt. If the frost and snow melt, open the shed, at least not reducing the temperature of the shed, so that the vegetables in the shed will see more scattered light.

    Experience 2: If there is rain and snow in the weather forecast, but the weather is good when the shed is covered, is the second film covered?

    At this time, we should not take a fluke. Once it rains and snows, the grass curtain will be difficult to dry all winter. Nowadays, some vegetable farmers do not hesitate to spend more time, it is better to cover the two membranes every day.

    Experience 3: If it is cloudy and low temperature for more than ten days, should the wind be released?

    At this time, it is best to let the wind blow once every 3 days, and let it out at noon, especially in the greenhouse that has just been planted with livestock manure as the base fertilizer, and it is even more important to let it out in time, otherwise the vegetables in the shed are likely to cause fertilizer damage and induce various kinds of The proliferation of germs has led to the occurrence of many diseases.

   Experience 4: The temperature difference between day and night in the shed is small, such as the temperature in the shed is 15～25℃, and the shed temperature at night is 13～23℃. Under this condition, vegetables are prone to lengthy growth, long joints, small flower buds, and serious flower and fruit drop. At this time, reduce the daytime Ventilation time, increase the temperature of the shed during the day, as far as possible to reach the highest temperature required for vegetables, in the evening when the shed temperature is reduced to 15 ℃, then cover the shed, it is best not to cover the shed above 20 ℃.

    Experience 5: In the snowy weather, vegetable diseases in the shed are most likely to spread. At this time, vegetable farmers often choose to smoke the shed to prevent and control diseases. At this time, vegetable farmers should pay attention that if the shed cannot be drawn without ventilation on the second day after smoking, it is easy to cause air damage in the vegetables; therefore, remind vegetable farmers to combine the weather forecast when smoking the shed to ensure that the shed is smoked. It can be safely ventilated the next day.

   Experience 6: Is the fruit picking lighter or heavier when it is overcast?

  Take eggplant as an example. Due to the weak photosynthesis and low temperature in continuous cloudy days, the accumulation of light and product cannot be supplied to the eggplant fruit in sufficient quantities. At this time, if the plant has a lot of fruit, the eggplant is prone to black hearts, wrinkled skin, dull color, and deformed fruits. There are also falling flowers and fruits, and it is better to pick the fruits heavier at this time.

    Lesson 7: When there is strong wind in winter, how to put grass curtains better?

    Practice has proved that the northwest wind often blows in winter. At this time, the grass curtain should be placed from the west side, so that the grass curtain is not easy to blow over and the second film will not be damaged.

    Experience 8: After a sunny day, the temperature in the shed has risen. Vegetable farmers also hope to spray pesticides to prevent and control diseases on sunny days. Due to the vegetable farmers’ psychology, the practice of concentrated spraying after sunny days is most likely to cause phytotoxicity; therefore, pay attention to: Do not increase the dosage at will; do not spray drugs that are sensitive to vegetables; spray the drugs properly, such as the young and tender parts of vegetables as little as possible.

Experience 9: Do not wipe the shed film immediately after the weather turns fine. If the shed film is wiped at this time, direct light will easily cause plants to wilt and cause sunburn. It is better to wipe again when the plants can receive direct light.