The content of protein in sweet potato is more than 7 times that of rice. The content of carotene is 3.5 times that of carrot; The content of vitamin A is 100 times that of potato. The contents of sugar, calcium, vitamin B 1 and vitamin B2 are higher than those of rice and flour.
The edible part of each100g fresh potato block contains 29.5g of carbohydrate, 0.2g of fat, 20g of phosphorus, 0.8g of calcium18g and 0.4g of iron. These substances can promote the activity of human brain cells and secrete hormones, and enhance human disease resistance.
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Living habits
Sweet potato likes light and is a short-day crop. Plant growth needs high light energy, which is a crop that is not tolerant to shade. From the stem and leaf stage, the growth period of light energy is long and the photosynthetic efficiency is high. Otherwise, it will reduce photosynthetic efficiency and affect plant growth.
The daily sunshine duration should be 8- 10 hour. Adequate sunshine can not only promote flowering and rooting, but also make more nutrients accumulate on the roots and promote the expansion of the roots.
References:
Baidu encyclopedia-sweet potato