The farmers in Qudi Town, Jiyang County, Shandong Province have the habit of growing cucumber seedlings in greenhouses. In October, seeing the hard-to-cultivate cucumber seedlings have to be transplanted and planted, and many vegetable farmers can control the temperature of indoor nursery. Humidity, especially on how to control the discharge of moisture during seedling stage, often results in the dry and dead leaves of cucumber seedlings.
Recently, in the shed of Wang Huaiguo, Wang Yuanqi Village, Qudi Township, Jiyang County, the author discovered that the cucumber seedlings he cultivated had caused excessive damage to the cucumber seedlings due to the excessive opening of the tuyere during the ventilation. The author saw in his greenhouse that the leaves of the melon seedlings in the nutrition cups were dry and the leaves were hot and watery, and individual deaths began to occur due to excessive water loss. Introduced by Wang Huaiguo, he had such a situation after suddenly expanding the wind.
In cucumber breeding process, ventilation is also a very particular technique. Ventilation on seedbeds is mainly to adjust seedbed environment so that cucumber seedlings can obtain proper temperature and humidity, and timely supplement carbon dioxide gas through ventilation.
Vegetable growers in their own plastic greenhouses for cucumber seedlings, different from the factory nursery, the conditions for growing seedlings are generally poor, especially in the control of seedbed temperature and humidity, all rely on artificial control, a little bit of a loss, they will come to naught. In plastic sheds, small plastic sheds are used to grow seedlings. When the seedlings reach 25°C in the morning, ventilation is started. When the temperature drops to 18°C ​​in the afternoon, ventilation is stopped. Ventilation must be carried out gradually, and the air vents are gradually increased as the temperature rises. Ventilation is too fast and excessive. Plastic sheds generally have two or three seams. Open the upper seam first to ventilate the air, gradually open the middle seam, and finally put the bottom wind. Ventilation begins when a section of the joint is ventilated, and the film is supported by wooden sticks. When the wind is relatively large, it is necessary to vent the wind on the lee side to avoid cold wind directly blowing on the seedlings.