Method for cultivating selenium-rich Chinese yams

Abstract

The invention relates to a method for cultivating selenium-rich Chinese yams. The method comprises the following steps: selecting breeds, wherein scab-free and malformation-free basal stem parts growing healthy and strong and with well-developed resting buds are selected as Chinese yam breeds; preparing soil, wherein farmland with the crop rotation interval of 8-10 years is selected, an organic biological fertilizer and a beneficial living bacteria agent are applied into the farmland, the organic biological fertilizer comprises an organic fertilizer, a protein fertilizer and attapulgite; executing sowing, wherein the soil of the farmland is permeable to water, the soil inside planting furrows with the depth of 150-180 cm and the width of 20-30 cm in the farmland is loosened, the spacing between every two adjacent planting furrows is 70-80 cm, the Chinese yam breeds are placed at the upper portion of the soil in the planting furrows, the spacing between every two adjacent Chinese yam breeds is 15-20 cm, and the breeds are covered with soil; executing topdressing, wherein an organic water-soluble fertilizer is applied, the content of the organic water-soluble fertilizer TE is 0.35% or above, the content of compound protease is 25% or above, and 15-20 kg of the organic water-soluble fertilizer is applied per mu; a leaf fertilizer is applied, wherein the leaf fertilizer comprises aresidue decreasing agent A, a residue decreasing agent B and nucleoside selenium, the residue-decreasing agent A and the residue-decreasing B are applied once every two weeks from a later period of root enlargement to a mature period, and the nucleoside selenium is sprayed once every week.

Description

technical field [0001] The invention belongs to the technical field of yam planting, and in particular relates to a cultivation method of selenium-enriched Chinese yam. Background technique [0002] Chinese yam is a plant of Dioscoreaceae, which contains starch, mucus, allantoin, choline, 16 kinds of amino acids, mannan polysaccharide, glycoprotein, multivitamins and minerals. It is sweet and flat in taste, invigorates the spleen and kidney, relieves diarrhea and resolves phlegm, and moisturizes the fur. It has unique biological activities in regulating immunity, lowering blood sugar, anti-aging and anti-oxidation. It is a traditional food with the same origin in my country. [0003] The use of chemical production in agricultural production, such as phosphate rock in fertilizers, in addition to chemical elements with nutritional functions, also contains harmful elements such as arsenic, cadmium, lead, mercury, chromium, etc.; high residues of heavy metal pesticides in the so...

AI Technical Summary

Problems solved by technology

[0004] At present, the research on the standardized technology of Chinese yam has made great progress, especially the prevention and control of plant diseases and insect pests, and high-yield cultivation techniques. It is a Chinese invention patent of CN201410094429.1, which discloses a simple cultivation technology of yam; however, there are few records in the prior art on how to reduce the heavy metal pollution of yam and further increase its nutrient element content.

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