Iodine-rich lettuce cultivation method

Abstract

The present invention discloses a planting method of lettuce rich in iodine. The method comprises the following steps that high-quality lettuce seeds are selected and soaked in clean water; the seedsare vernalized after being scrubbed and dried; and then the seeds are sown after being sprouted; the soil of the seedbed is broken finely and leveled up and the seedbed is filled with enough water atthe bottom; after water infiltration, the seeds which are sprouted are mixed with the sand evenly and sown on the seedbed and then covered with earth; the seeds are planted in a fixed way after 5 to 6true leaves are sprouted; the seedling is watered one day before the seedling is transplanted in a fixed way and the seedlings are transplanted to the field next day; enough basics manure is appliedbefore the lettuce seedlings are planted in a fixed way and the solid iodine organic material is applied in the soil surface layer for one time or the liquid iodine fertilizer is sprayed by stages before the lettuce is picked up. The present invention can plant lettuce rich in iodine directly and more importantly, the iodine fertilizer resided in the soil and lettuce roots rich in iodine can increase the iodine content in the soil and peripheral environment; in this way, the ecological environment in iodine deficient areas can be improved and the iodine content of food chain can be promoted.

Description

technical field [0001] The invention relates to a cultivation method of iodine-enriched 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 the thyroid gland. Without iodine, the thyroid gland cannot synthesize thyroxine. It has biological functions such as promoting protein synthesis, regulating energy conversion, accelerating growth and development, and maintaining the structure of the central nervous system. Therefore, iodine deficiency in the human body will lead to a series of physiological disorders and abnormal biological functions, especially when babies are iodine deficient during growth and development. It can cause intellectual disability, and the overall impact on the human body due to iodine deficiency is called "iodine deficiency disease" (IDD). [0003] According ...

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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. People of different ages and categories (such as children, adults, pregnant women and nursing mothers) have a large daily demand for iodine. The difference is that the national salt iodization is implemented to supplement iodine for people who are really iodine deficient, but also forcibly supplement iodine for people who are not deficient in iodine, and even a small number of people who have excessive iodine intake. The incidence rate of high iodine disease has increased due to excessive intake of iodine, and it is spreading; third, in areas with severe iodine deficiency, once iodized salt is stopped, the prevalence rate of IDD will increase, which shows that adding iodine to table salt is a kind of Temporary rather than permanent and fundamental measures to improve iodine deficiency

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