First, the scientific storage conditions of potatoes: potato varieties are more, according to skin color can be divided into white, red, yellow and purple skin four types, of which red and yellow species are more resistant to storage. Suitable storage temperature for potatoes is 3-5 °C, relative humidity 90-95%, 4 °C is the most suitable storage temperature for most varieties, at this time the tubers are not easy to germinate or germinate very rarely, and it is not easy to shrink. In addition, there is a significant period of physiological dormancy after harvesting potatoes, which is 2-3 months. Before potatoes are stored, they must be carefully selected to remove diseased, rotten, injured, and poor potato chips that have pockmarks and moisture. Watering should be stopped one week before harvest to reduce the moisture content and promote the aging of the potato peels. To facilitate early entry into hibernation and reduce disease. After harvesting, the callus was treated under high temperature and humidity conditions (10-15°C, 95% relative humidity) to recover the mechanical damage at harvest and then stored. Second, the scientific storage of potatoes 1. Heap method: Select a well-ventilated, dry-site warehouse, first with formalin and potassium permanganate mixed fumigation, after the potatoes into the warehouse, generally 750 per square meter heap Kilograms, about 1.5 meters high, surrounded by crates, baskets or wooden panels, placed in the middle of a number of bamboo ventilation tube. This method is suitable for short-term storage and storage of autumn potatoes. 2. Ventilation storehouse storage method: Put potatoes in baskets and store them in baskets, each basket is about 25 kilograms, baskets should be 5-6 baskets. In addition, it can also be piled up in the warehouse, with a height of 1.3-1.7 meters, and at least 60-80 centimeters of space must be left between the stack and the top of the warehouse. Put a ventilator every 2-3m in the potato stack, and connect the ventilator to the ventilator at the bottom of the potato stack, and use a blower to blow cold air. In autumn and early winter, the ventilation system is turned on at night to allow cold air to enter, and during the day it is closed to prevent hot air from entering. In winter, attention should be paid to heat preservation and, if necessary, warming. After the spring temperature rises, the nighttime ventilation and daytime closure are used to ease the rise of the temperature. 3. Drug storage method: The use of agents such as Qingxin (MH) or methyl naphthylacetate during storage can inhibit or reduce germination, and can also inhibit the growth of pathogenic microorganisms and can be preserved. Method: 98% of nitric acid, acetone, fine clay, potato ratio 1:2:100:3300. Take 500kg potato chips as an example, it needs 98% of methyl naphthaleneacetate 1.5g, dissolved in 30g of acetone or alcohol, then slowly mix in 1-1.25 kg of dry fine soil, quickly and fully mix, and then into gauze Or in a burlap bag, then spread the drug evenly over 500 kilograms of the tuber, and the drug should be ready for use. During storage, 1-2 layers of fine paper can be covered around to volatilize the drug in a relatively confined environment. The time of drug treatment is appropriate around 2 months after harvest (ie during dormancy). Otherwise, potatoes that have germinated after the dormancy period, even if they are treated with drugs, still cannot suppress germination. China Agricultural Network Editor
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