1. Small cultivation area: Although black potato has been introduced into China, the cultivation area is relatively small and the yield is limited. Therefore, the supply of black potatoes in the market is less.
2. Regional differences: Black potatoes can be seen in some markets in Gansu, Inner Mongolia, Heilongjiang, Shanxi and other places, but other areas may not be suitable for planting because of geographical and climatic factors, resulting in limited market supply.
3. Variety promotion and awareness: As a new variety, the promotion and awareness of black potato may be relatively low, and consumers' understanding and acceptance of it is limited.