Method for planting high-calcium rich-selenium purple-sweet-potatoes

Abstract

The invention relates to the technical field of purple sweet potato planting, in particular to a method for planting high-calcium rich-selenium purple-sweet-potatoes. According to the method, a cassava-fermented rich-selenium high-calcium organic-fertilizer is used to improve planting soil, so that the soil is rich in selenium, high in calcium and loose, and meets the needs of purple sweet potato growing; a chelated selenium liquid fertilizer added with amino acid is applied to promote the sweet potatoes to absorb organic selenium, so that the selenium content of the sweet potatoes is improved effectively; moreover, effective components can be extracted from natural plants and used for killing pests, so that a made insecticide can be decomposed by the environment easily and not cause pesticide residues, pollution and other harm; the effective components of extractives have a broad-spectrum bactericidal effect, especially for trapping and killing weevils, the effect is remarkable, and therefore the insecticide can effectively ensure that the purple sweet potatoes are not harmed by the pests.

Description

【Technical field】 [0001] The invention relates to the technical field of planting purple sweet potatoes, in particular to a cultivation method of purple sweet potatoes rich in selenium and high in calcium. 【Background technique】 [0002] Sweet potato is the fourth largest food crop in China, and it is also an important industrial raw material, feed, new energy and health crop. China is the country with the largest sweet potato planting area and the highest fresh potato production in the world, with a sweet potato planting area of ​​about 4.6 million hectares 2 , The total output of fresh potatoes is about 100 million tons, accounting for 75% of the world's total output. At present, many provinces and regions in my country regard sweet potato as the dominant crop in the adjustment of agricultural industrial structure, and sweet potato is gradually changing from a traditional food crop to a profitable economic crop. [0003] The purple sweet potato flesh is purple in color, ...

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Problems solved by technology

[0003] The purple sweet potato flesh is purple in color, rich in anthocyanins, and has high nutritional value and health care effects on the human body. Moreover, because purple sweet potatoes are sweeter and taste better than yellow sweet potatoes, the demand has greatly increased. At present, Due to the particularity of the selenium-enriched soil in Guangxi, there are also some studies on the cultivation of selenium-enriched sweet potatoes. However, due to the unstable selenium content in the natural environment, the selenium content of purple sweet potatoes cannot be guaranteed, and it cannot play the role of selenium-enriched and high-calcium. Effect, of course, in order to achieve the effect of selenium-enriched and high-calcium planting, conventional planting methods mainly add inorganic selenium solutions such as sodium selenite. Not obvious, but also cause selenium pollution

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