Selenium-rich fertilizer for leafy vegetables

Abstract

The invention discloses a selenium-rich fertilizer for leafy vegetables. Each 1 kg of selenium-rich fertilizer for leafy vegetables is prepared from the following components by weight (g): 175.45g of urea, 149.18g of potassium chloride, 363.02g of calcium superphosphate, 123.25g of magnesium sulfate, 3.25g of ferrous sulfate, 0.53g of manganese sulfate, 0.06g of zinc sulfate, 0.02g of copper sulfate, 0.72g of boric acid, 7.50g of sodium selenite and 177.03g of ground phosphate rock. Sodium selenite is applied to the selenium-rich fertilizer, while traditional sodium selenate is not used, so that the health threat to a producer and a consumer caused by the fertilizer is avoided. In addition, sufficient selenium fertilizer is added; the necessary nutrients such as nitrogen, phosphorus, potassium, iron, magnesium, copper and zinc for plants are added by aiming at the fertilizer requirement law of the leafy vegetables; the labor-saving, time-saving and multi-purpose effects are put into fully play; and the selenium-rich fertilizer plays an important role in production of selenium-rich vegetables, and is convenient and safe to fertilize, relatively low in cost, beneficial to popularization, and wide in application prospect.

Description

technical field [0001] The invention relates to the field of leafy vegetable fertilizers, in particular to a leafy vegetable selenium-rich fertilizer for cultivating selenium-rich leafy vegetables on selenium-deficient soil. Background technique [0002] Selenium (Se) is a trace element with a molecular weight of 78.96. It is located in the VIA group of the chemical element periodic table, and its chemical properties are similar to the sulfur element of the same group. The current general view is that an appropriate amount of selenium in the diet plays an important role in maintaining the health of the human body. First of all, selenium plays an irreplaceable role in improving the body's antioxidant capacity. In addition, selenium also has important physiological functions such as anti-cancer, liver protection, binding heavy metals, and prevention and treatment of cardiovascular diseases. At the same time, selenium deficiency is also an important cause of human Kashin-Beck...

AI Technical Summary

Problems solved by technology

However, sodium selenate is a highly toxic chemical, which can easily cause great harm to the health of operators during production

At the same time, the residual sodium selenate that is not absorbed by plants will pose a great threat to the health of consumers

[0007] On the other hand, in the existing selenium-enriched fertilizers, except for the high content of selenium, the content of other nutrients is relatively small, and even completely does not contain some trace elements necessary for plant growth.

The single use of this kind of selenium-rich fertilizer will have a great impact on the yield and quality of dishes

And if other fertilizers are applied in addition, it will not only increase the purchase cost, but also increase the labor cost

[0008] Third, traditional selenium-rich fertilizers need to be applied directly to the soil

On the one hand, the selenium element in the fertilizer will be leached into the deep soil with irrigation, which is not conducive to the utilization of vegetables and will cause waste of fertilizer

On the other hand, heavy metal elements in fertilizers will continue to accumulate in the cultivated soil as they are applied, and then eventually enter the plants, causing potential harm to the safety of vegetables

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