The main causes of cracking sweet potatoes are the following: First, the problem of the breed itself. The second is soil compaction, not loose, poor air permeability, and low organic matter content. Third, nutrients in the soil are not balanced, and calcium and boron are insufficient. Among them, calcium deficiency is related to drought or excessive application of nitrogen and potassium fertilizers; boron deficiency is due to soil drought or excessive application of potassium fertilizer, which hinders the absorption of boron; under high temperature conditions, the growth of plants is accelerated due to poor mobility of boron, so The supply was not timely, resulting in partial lack of boron. Fourth, uneven water supply during growth, long-term drought after a sudden encounter with large water, causing rapid growth of potato meat, and the epidermis grows slower than the internal and break through the epidermis. The fifth is caused by the infestation of the underground pests of tubers, and in particular, borer-type goldworms are the main underground pests of sweet potatoes.
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