Sweet potatoes are a kind of coarse food that is common on our table. There are many friends who grow sweet potatoes in the countryside. But friends who have grown sweet potatoes should know that sweet potato storage is not an easy task, because once the environment is wrong, sweet potatoes are prone to decay. White hair, etc., will greatly damage the planting interests of the growers. So, how can sweet potatoes be safely stored? Let's learn about the safe storage technology of sweet potatoes with Huinong.

In the past, potato farmers have summarized the experience of “scientific sputum, special management, thermometer, ventilation eye” from the long-term safe storage practice. The so-called scientific flaws are not completely embarrassing, and the building standards are high, as long as they can achieve heat preservation, moisturizing and ventilation. The cockroaches (libraries) that can achieve fresh-keeping storage should be regarded as “scientific cockroaches”.

It is necessary to grasp the characteristics of different storage defects, overcome the shortcomings, and carry forward the advantages for safe storage. Traditional wells, good insulation, but not easy to dissipate heat. Warming 窖 should pay attention to anti-dry, 窖窖 small anti-cold, all kinds of 窖 type should pay attention to the stock, reasonable stacking, set ventilation holes (eyes), to achieve convenient control.窖 is the condition of storage, and scientific management is the guarantee of safe storage. The warm, humid environment is the home of sweet potato winter storage, and it is safe to sleep. In terms of storage measures, we should do a good job:

1. Selected before entering the country

Potatoes of different varieties and sizes are separated and separately. To achieve "ten into the shackles": mud, broken, sick, insect bites, frozen, rain, flooding, germination, outcropping, cracks and other potato blocks are not allowed to enter.

Safe storage technology of sweet potato

2, choose a good site type

Jianye should choose a place where the leeward sun is strong, the terrain is high, the wind is not strong, the soil is hard, and the water table is low and convenient to manage. In the north of Guanzhong, many of the provinces are mainly wells, and in southern Shaanxi, they are mainly tins. It can also be used in semi-underground high-temperature cabins, improved wells, fixed coupons, kiln rafts, sheds and other types of rafts.

3. Potato seed treatment

The drug treatment can kill the bacteria on the surface of the potato block and the shallow wound, and play a role in disease prevention and preservation. However, it has no effect on physiological changes such as low temperature, wet damage, and bruising. Still have to maintain the right temperature.

(1) Sweet potato preservation powder: It is a compounding agent for various pesticides, and the disease prevention effect is ideal.

(2) Carbendazim: It is a systemic fungicide with high efficiency, low toxicity, low residue and wide sterilization range. It has good effect on preventing black spot and soft rot. 300 to 500 times the drug solution, soaking for 5 to 10 minutes.

(3) Methyl thiophanate: It is also a high-efficiency and low-toxic pesticide, its nature is the same as that of carbendazim, but the disease prevention effect is better than carbendazim, and the soaking method is the same as carbendazim.

4. Management of yam

Regardless of the type of cockroaches, the suitable temperature for the potato pieces during storage is 11 to 14 ° C. Below 9 ° C, it is susceptible to chilling damage. Above 15 ° C, the respiration is strong, and the nutrients and water are consumed in large quantities, resulting in weight loss of the potato pieces. When the temperature is higher than 16 °C, the potato pieces are easy to germinate and the disease develops. According to the characteristics of potato chips and weather changes, the temperature should be reduced in the previous period, medium-term insurance, and later temperature management. The management of yam is divided into three stages:

(1) Early stage: The potato chips are mainly ventilated, cooled, and damp. Because the outside temperature is high when the first time, the potato block has a high breathing intensity, and a large amount of water vapor, carbon dioxide and heat are released, resulting in high temperature and high humidity. This creates conditions for the germination and infection of potato stalks, especially the diseased potato stalks are spread due to the spread of pathogens, causing a large amount of rot of potato stalks, commonly known as “burning cockroaches”. If the temperature is right, the potato will only germ and not rot. During the 30 days (especially within 20 days) of the potato stalks, it is necessary to pay attention to the changes in the internal temperature and humidity of the mash and adjust it. During this period, the temperature should be controlled below 15 ° C, preferably 11 to 14 ° C, and the relative humidity is maintained at about 85%.

(2) Mid-term: This period refers to the 30-day period after the potato stalks enter the raft, and before and after the spring season, it is mainly composed of heat preservation and cold protection. At this stage, the temperature is low, the potato block has weak breathing intensity, and the calorific value is small, which is the time when the potato block is most vulnerable to cold damage. Mainly pay attention to heat preservation of yam. If the soil is sealed, the hay is covered on the potato pile, and the temperature in the snow should be properly warmed.

(3) Late stage: Before the spring to the exit, ventilation should be strengthened. In this period, as the temperature gradually rises, there is a constant cold current, and the weather changes erratic. Due to the long-term storage of the potato tubers, the respiration is weak, the resistance is greatly weakened, and the excessive temperature changes cannot withstand the low temperature. Therefore, we should always pay attention to the weather changes, keep the temperature inside the crucible at around 12 °C, and the relative temperature is not less than 85%.

Ensuring proper temperature during storage should be carried out through mouthwash, ventilation eye and auxiliary heating measures. The temperature should be measured: the accurate thermometer should be used, the measuring point is reasonable, and the observation is correct and timely.

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