Method for planting pollution-free selenium-rich lettuce

Abstract

The invention discloses a method for planting pollution-free selenium-rich lettuce. The method includes: pre-treating soil : accelerating germination and raising seedlings, preparing an ozone solution, adding 2 mass %-3 mass% glass powder into the ozone solution and evenly stirring the ozone solution to acquire a soaking solution, soaking seeds, and performing germination accelerating and sowing; performing planting; performing water and fertilizer management: irrigating the lettuce with seedling-reviving water after the lettuce is planted for 3-5 days, dissolving 8-10 Kg of a mixed fertilizer and 0.8-1 Kg of the selenium-rich nutritive solution in 150 Kg water in 10-15 days to water roots of the lettuce in one mu land, dissolving 10-12 Kg of the mixed fertilizer and 1-1.2 Kg of the selenium-rich nutritive solution in 200 Kg water to water the roots of the lettuce in one mu land during a rosette stage of the lettuce, and irrigating the lettuce with water and fertilizer according to the amount of water and fertilizer of the rosette stage again when heart leaves of the lettuce curve inward; arranging a reflective curtain outside a greenhouse; and disease and pest control. The method can effectively increase the selenium content of the lettuce, improve the nutriment quality of the lettuce, and increase the income of farmers.

Description

technical field [0001] The invention relates to the technical field of lettuce planting, in particular to a method for planting pollution-free selenium-enriched lettuce. Background technique [0002] The different selenium content in the soil will cause great differences in the selenium content in food in various places. If the selenium content in the soil is below 0.6mg / kg, it belongs to the selenium-deficient soil. 72% of my country's land is selenium-deficient or selenium-deficient soil. Long-term intake Serious selenium-deficient foods will inevitably cause selenium-deficiency diseases. At present, the selenium-rich areas that have been discovered in my country include: Fengcheng in Jiangxi, Ping'an in Qinghai, Enshi in Hubei, Ankang in Shaanxi, Kaiyang in Guizhou, Longyou in Zhejiang, Wanyuan in Sichuan, Wanchang in Jilin, Liuhe, etc. However, some of these selenium-enriched areas are small in size, and some areas are accompanied by undesirable minerals such as lead and...

AI Technical Summary

Problems solved by technology

However, some of these selenium-enriched areas are small in size, and some areas are accompanied by undesirable minerals such as lead and mercury, which are not suitable for direct consumption by the human body. A survey conducted by the Chinese Nutrition Society on 13 provinces and cities in my country shows that adult daily The average selenium intake is 26-32 μg, which is far from the minimum recommended by the Chinese Nutrition Society of 50 μg

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