At present, the earliest potatoes in the arch sheds of Lund county enter the flowering stage. This period is not only the most sensitive period of potato water requirement, but also the strict temperature requirements. After entering mid-to-late May, as the temperature rises, the temperature in the shed increases, which is not conducive to the expansion of tubers and tubers. In order to regulate the temperature of the arch shed to the optimum temperature for potato growth, the air cooling during this period is the most important task in potato field management. The specific approach is: on the sides of the arch shed, the arch sheds will be pressed on the ground. The shed film is rolled up to form a ventilation belt, and the height of the ventilation belt is determined by the temperature change, generally 50 to 100 angstroms. The temperature in the greenhouse was controlled at 16°C～18°C, and the soil temperature was controlled at 18°C～21°C, which was the most favorable for tuber formation and expansion. If the temperature exceeds 2l°C, the potato growth will be inhibited and the growth rate will be significantly reduced. When the soil temperature exceeds 25°C, tubers basically stop growing. While doing a good job in ventilation management, but also do a good job of water and fertilizer management, you can use 0.1% ~ 0.3% of borax or 0.5% potassium dihydrogen phosphate aqueous solution spray fertilizer, and the third irrigation.
The county’s precocious potatoes in the whole county took full coverage of this year's cultivation, and used crosswinds to control the temperature. Currently, a few arches in Chengguan Town have been stripped of the greenhouse film. The reasons are as follows: First, these arched canals have not been matched and cannot be filled with water. Satisfy the potato's demand for water; second, most of the arch sheds in Chengguan Town do not have laminating lines and can not cool the side winds. In order to ensure the most suitable temperature for the potatoes during budding and blooming, some people will remove the sheds. However, in accordance with the cultivation and management techniques of the arch sheds, it is required that all the sheds be pressed and pressed to reduce the temperature of the side winds. It is forbidden to remove the shed film.
The county’s precocious potatoes in the whole county took full coverage of this year's cultivation, and used crosswinds to control the temperature. Currently, a few arches in Chengguan Town have been stripped of the greenhouse film. The reasons are as follows: First, these arched canals have not been matched and cannot be filled with water. Satisfy the potato's demand for water; second, most of the arch sheds in Chengguan Town do not have laminating lines and can not cool the side winds. In order to ensure the most suitable temperature for the potatoes during budding and blooming, some people will remove the sheds. However, in accordance with the cultivation and management techniques of the arch sheds, it is required that all the sheds be pressed and pressed to reduce the temperature of the side winds. It is forbidden to remove the shed film.
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