First, the harvest of virus-free seed potatoes
The virus-free seed potato should be harvested in a timely manner. It is generally appropriate to harvest in the late October and the daily average temperature of around 15°C. If the harvest period is too late, the virus-free seed potato is frozen in the field, and its resistance to disease is poor, and it is perishable during the early storage period. Should choose sunny weather, in the morning plan to harvest seed potato drying, entering the pit in the afternoon of the same day; if the day can not enter the pit, must be covered overnight to prevent freezing of seed potatoes. When harvesting, light planing, light loading, light transport, and light unloading should be done to minimize damage to seed potatoes. When entering the pit, strict quality control should be implemented to remove the seed potatoes with damage, pests and diseases, cracks, and weights less than 100 g and that do not meet the characteristics of the species.
Second, the preparation of storage
Choose sheltered winds, sunny terrain, solid soil, low groundwater level, convenient transportation and management, and well-established pits with good drainage conditions. If it is stored in an old cellar, it must be completely cleaned and disinfected. The method of disinfection is: scrape the top layer of topsoil in the pit and then use quicklime, formalin, carbendazim, or sulfur fumigation. Before planting potatoes into the pit, they must be covered with a layer of corn stalks on the ground and around, which not only reduces the damage of seed potatoes but also absorbs excess moisture.
Third, the kind of potato pit management
Seeds are stored for 1 to 20 days after entering the cellar. As the temperature is relatively high during this period, the seed potato respiration is strong, the moisture discharged is large, the humidity is high, and the cellar temperature is easy to increase. Attention should be paid to opening windows, doors, and ventilation holes in time to cool and disperse moisture. . When the cellar temperature drops to 13 to 15°C, immediately close the doors and windows, adjust the vents, and prevent the cellar temperature from dropping sharply. From the 20th day after the seedlings enter the pit to the middle of the second year of the second year, it is the middle period of storage. During this period, the temperature is low and the seed potatoes are vulnerable to freezing. Therefore, in addition to closing doors and windows and ventilation holes, it is necessary to add cold cotton curtains outside the doors and windows or The seed potatoes are covered with moisturizing grasshoppers, so that the temperature in the pits is kept between 11 and 13°C. After mid-February, it is the late period of storage. During this period, temperature and ground temperature rise rapidly, but often there are more cold currents and unstable temperatures. After a long-term storage, the physiological function of seed potato is poor, and it is particularly sensitive to low temperatures. Therefore, the stability of the cellar temperature should be the main factor in the later period so that the cellar temperature can be maintained within the range of 13 to 14°C. In short, the storage temperature of seed potato can not be lower than 9°C, and seedlings are vulnerable to freezing damage; it can't be higher than 15°C. If the seed potato is high, it will germinate, and the soft rot of sweetpotato will easily occur, reducing the pit of the seed potatoes. rate. The cellar humidity is maintained between 75% and 85%. During the storage period, if a diseased potato is found, the pit shall be cleared out in time, and some powdery fungicide or quicklime shall be sprinkled on the bad rotten potato to prevent the disease from spreading; if the rotten potato is more, the potato heap can be lightly removed Potato, remember not to fall down pit.
This category includes many whitening factor products,
which are higher-priced whitening products in cosmetic raw materials,
while increasing the barrier to the skin,
Anti-Aging Material,Pure Bakuchiol Oil, and we are specialize in N-Acetylneuraminic Acid,Epidermal Growth
Shaanxi Haibo Biotechnology Co., Ltd. specializes in the research, production and sales of natural plant extracts used in the cosmetic raw material industry.
Anti-Aging Material,Pure Bakuchiol Oil,N-Acetylneuraminic Acid,Epidermal Growth Factor
SHAANXI HAIBO BIOTECHNOLOGY CO., LTD , https://www.rozenbio.com