Key points of storage and fresh-keeping technology of sweet potato

Sweet potato (sweet potato) is a traditional product in Shanting area. Since 2000, three villages and towns in this area have been processing sweet potatoes for foreign trade companies every year, with an annual processing of 1.6 million kilograms of sweet potatoes, thus forming a set of cellar storage and fresh-keeping technology with good results. The main technical points are introduced as follows:

1. The cellar. Choose to build a cellar in a place with high terrain and red loam. The depth of the cellar is about 3 meters, the height of the two storage holes of sweet potato is not less than 1.8m, and the length and width of the cellar is not less than 2.5m. The cellar can store about 4000 kg of fresh sweet potato.

two。 Get ready. Before the sweet potato enters the cellar, the old pit hole should be dug again to see the new soil, and the old soil should be transported out of the cellar. If the pit is relatively dry, you can pour a few buckets of water to keep the pit moist. Before storing sweet potatoes, 50% carbendazim wettable powder or 50% sulfur suspension should be sprayed evenly in the cellar to achieve the purpose of sterilization and disinfection.

3. Hoarding. Sweet potatoes that are free of bacterial infection and pests should be selected as far as possible. Handle them gently when moving into the cellar, and be careful not to damage the peel. For every 150 kg of sweet potato, spray it evenly with the diluent of "sweet potato antistaling agent". Sweet potatoes are stacked according to size to facilitate cellar dumping. The height of sweet potato stacking should be about 60 cm from the top of the cave to facilitate sweet potato breathing and heat dissipation.

The sweet potato stored by the above method can be kept fresh for more than 8 months, and the intact rate of sweet potato can reach 96%.