Method for planting vigna containing iodine

Abstract

The invention discloses a planting method of cowpeas containing iodine. The steps of the method are as follows: 1) a piece of land with mild acid and sandy loam soil , on which no leguminous crop is planted for two years, is selected to plant the cowpeas, the land is firstly ploughed, raked to be fine and leveled, then ridges and ditches are made; 2) cowpea seeds are put on seedbeds for raising, transplantation and permanent planting can be carried out when a first pair of leaves come out but not unfold, or the cowpea seeds are directly sowed on the ridges; 3) racks are inserted timely when crrus is to come out on the plants, and when the main crrus grows to a certain height, the top part of the main crrus is cut so as to promote the growth of the blossom buds of the lateral branches at the lower part; 4) sufficient basic fertilizer is fertilized before the transplantation of cowpea seedlings or direct sowing of the cowpea seeds and solid iodine organic fertilizer is added into the surface layer of the soil before the transplantation of cowpea seedlings or direct sowing of the cowpea seeds, or liquid iodine fertilizer is sprayed to the leaf surface before picking the cowpeas. The cowpeas containing iodine planted by the invention can be a direct natural source of iodine for human body by eating, meanwhile, the background content of iodine in the soil and the surrounding environment can be increased, so as to gradually improve the ecologic environment that is lack of iodine.

Description

technical field [0001] The invention relates to a planting method of iodine-containing cowpea. Background technique [0002] Iodine 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 4 iodine atoms in each molecule of thyroid gland. Without iodine, The thyroid gland cannot synthesize thyroxine, which has biological functions such as promoting protein synthesis, activating more than 100 enzymes, 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 in infants Iodine deficiency during growth and development can cause intellectual disability. The overall impact of iodine deficiency on the human body is called "iodine deficiency disease" (IDD). According to epidemiological surveys and statistics fro...

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Problems solved by technology

However, it has been exposed in many years of practice 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. There are obvious individual differences in the absorption of iodine, 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 will produce different properties and different degrees of damage to the body. Biological effects, 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 nursing mothers) have different daily iodine requirements. There is a big difference (Table 1). When iodine supplementation is carried out for people who are really iodine deficient in the implementation of universal salt iodization, iodine supplementation will also be forcibly given to people who are not deficient in iodine, and even a small number of people who have excessive iodine intake. According to relevant data, In recent years, due to excessive iodine intake in China, the incidence of high iodine disease has increased, and it is spreading; third, in severe iodine deficient areas, once iodized salt is stopped, the prevalence of IDD will increase, which shows that salt Adding iodine is a temporary, not permanent, and fundamental measure to improve iodine deficiency

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