Sweet potatoes cannot be mixed with potatoes
Sweet potatoes cannot be mixed with potatoes for two reasons:
Sweet potato with different temperature in cellar period is a heat-loving crop, which is planted in summer and early autumn with high temperature. The optimum temperature in cellar period is 10 ℃ ~ 15 ℃. If the temperature is too low, it will be damaged by cold and "hard core" rot will occur in serious cases. Potato is a cold-loving crop, which is planted in early spring and late autumn with low temperature. The optimum temperature in cellar period is 1 ℃ ~ 5 ℃. If the temperature is too high, it will sprout and turn green and poisonous and inedible.
During the cellar storage period, different ventilation and light are required for sweet potato root storage, which has weak respiration and low oxygen demand during winter storage, and can safely survive the winter under the condition of no light, dark and no ventilation and micro-oxygen. Potato is different, it is tuber storage, winter storage, not only have a certain amount of scattered light, but also must have sufficient oxygen. If hypoxia, potatoes are forced to carry out anaerobic respiration, due to alcoholism, resulting in potato "sweating" resulting in rot, so winter storage should have good ventilation and moderate light transmission conditions.
According to the physiological characteristics of sweet potato and potato during storage, if they are stored together, it is impossible to meet the needs of temperature, light and oxygen in management. The result is either poisonous potato sprouting or sweet potato "hard heart", so don't mix the two potatoes for storage.
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Matters needing attention in harvesting potatoes by machine
When harvesting potatoes by machinery, in order to save time, labor and labor, and to improve the economic benefits of the use of machinery and the commodity rate of potatoes, we should pay attention to the following problems. The main results are as follows: (1) about 10 days before the harvest time, the seedlings should be rolled or cut first (the method of rolling seedlings is to thread the waste tires into a string and drag the seedlings with a tractor) to make the potato skin aging and prevent the potato from breaking during harvest and affecting the quality of commercial potato. (2) the matching of potato pickers for each unit should be reasonable, and the small harvester should be equipped generally.
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Black purple potato
Potato shape was long oval, bud eye smaller. The skin is dark purple. Rich in luster, the flesh is dark purple. The starch content of the pulp is as high as 13%~15%, and the taste is good and the quality is excellent. According to the determination: every 100 grams of black purple potato contains protein 2.3 grams, fat 0.1 grams, carbohydrates 16.5 grams, calcium 11 mg, iron 1.20 mg, phosphorus 64 mg, potassium 342 mg, magnesium 22.9 mg, carotene 0.01 mg, thiamine 0.1 mg, riboflavin 0.03 mg, nicotinic acid 16 mg. Also,
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