Method for planting iodine-containing lettuce

Abstract

The invention discloses a nursing method of a lettuce rich in iodine. The nursing method comprises the following steps: 1) a lettuce seed of high quality and high yield is selected, immersed in clear water, exposed in natural temperature and is planted when eighty percent of seeds grows out; 2) the lettuce seedlings with buds are adequately sparsely planted on the seedling bed and thinned out after the leaves come out and can be transplanted and planted when five to six leaves of the lettuce seedling come out; 3) before planting, a flat and fertile field is selected, deep ditches and high planting beds are adopted to plant the seedlings with earth in a cloudy day or at four o'clock p.m.; 4) basic fertilizer is applied before lettuce seedlings are planted, solid iodine organic fertilizer is applied on the soil surface at one time or liquid iodine fertilizer is periodically sprayed before lettuce is picked. People often eat lettuce containing iodine nursed with the invention in daily life which is not only beneficial to the health, but also can be an effective natural source for making up the food iodine beneficial to human body.

Description

technical field [0001] The invention relates to a cultivation method of iodine-containing lettuce. Background technique [0002] Iodine is an essential trace element for the human body. It plays an extremely important role in the metabolic process of the human body. More than one-third of the iodine in the human body exists in the form of thyroid gland. There must be 3 or more in each molecule of thyroid gland. 4 iodine atoms, without iodine, the thyroid gland cannot synthesize thyroxine. Thyroxine has biological functions such as promoting protein synthesis, activating more than 100 enzymes, regulating energy conversion, accelerating growth and development, and maintaining the structure of the central nervous system. Therefore, the human body Iodine deficiency can lead to a series of physiological disorders and abnormal biological functions, such as goiter and cretinism, especially iodine deficiency during growth and development of infants, which can cause intellectual disa...

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Problems solved by technology

However, it has also been exposed in practice for many years that there are some obvious defects in this measure: the one is that the inorganic iodine added in table salt is volatile, and part of the iodine will be lost during storage, transportation and cooking, so the concentration of iodine added in table salt is very low. In addition, there are obvious individual differences in the absorption of inorganic iodine in salt by the human body, so that it is difficult to quantitatively evaluate its biological effectiveness; second, the iodine in the organism has the characteristics of double thresholds, that is, high iodine or low iodine Iodine will have different properties and different degrees of biological effects on the body. High iodine intake can also cause disease. Studies have shown that thyroid cancer is also related to excessive intake of iodine. People of different ages and categories (such as children, adults, Pregnant women and breast-feeding mothers) have very different iodine requirements every day. When iodine supplementation is implemented for people who are really deficient in iodine, people who are not deficient in iodine and even a few people who take too much iodine should be supplemented with iodine forcibly. According to relevant data, the incidence of hyperiodine disease has increased due to excessive iodine intake in China in recent years, and it is spreading; third, in areas with severe iodine deficiency, once iodized salt is stopped, the prevalence of IDD will increase. will increase, which shows that salt iodization is a temporary rather than a long-term measure to fundamentally improve the iodine deficiency situation

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