Selenium-rich sweet potato growing method

Abstract

The present invention discloses a selenium-rich sweet potato growing method. The sweet potatoes are planted in conventional methods. The selenium-rich sweet potato growing method comprises a first step of carrying out seedling planting before May and spraying the seedlings with a selenium-rich diluent after survival of the seedlings from the planting; a second step of applying a selenium-rich fertilizer when cracks arise generally in the field, irrigating the selenium-rich fertilizer to roots of the seedlings along the cracks; a third step of spraying a mixed solution of sodium selenite and monopotassium phosphate onto stem leaves of the sweet potatoes in early August; and a fourth step of harvesting in time when the temperature drops to 15 DEG C. The selenium-rich sweet potato growing method has the advantages that the selenium-rich diluent, the selenium-rich fertilizer and the sodium selenite diluent are sprayed on the sweet potato seedlings in various methods at different phases, an absorptive amount of selenium to the sweet potatoes is raised, the selenium content of the sweet potatoes can reach 18-24 [mu]g / kg in selenium-deficient areas, the size of the sweet potatoes can also be raised, the acre yield of the sweet potatoes can be equal to or more than 4500 kg, the selenium-rich sweet potatoes can play a cancer prevention and beautification role after long-term consumption, and good quality and high yield of the sweet potatoes are realized.

Description

technical field [0001] The invention belongs to the technical field of agricultural breeding, and in particular relates to a method for planting selenium-enriched sweet potatoes. Background technique [0002] Sweet potato tubers contain 10-30% starch, about 5% sugar and a small amount of protein, oil, cellulose, hemicellulose, pectin, ash, etc. In addition to fat, the content of protein and carbohydrates is higher than that of other nutrients. Rice and flour are high, and the protein composition in sweet potatoes is relatively reasonable, and the content of essential amino acids is high. In particular, lysine, which is relatively lacking in grains and cereals, has a high content in sweet potatoes. In addition, sweet potatoes are rich in carotene and vitamin A. , B, C, E, and starch are also easily absorbed by people. [0003] Many sweet potatoes are also rich in selenium, which is a unique trace element that makes people live longer. Without enough selenium, the cells in t...

AI Technical Summary

Problems solved by technology

Therefore, if the sweet potato contains a certain amount of selenium, it can be better absorbed and utilized with the synergistic effect of the vitamins in it, and has an unexpected effect. However, due to selenium deficiency in many areas of the country, the selenium content of sweet potatoes planted is too small

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