Foliar blocking and controlling agent for reducing content of cadmium and arsenic in rice as well as preparation method and application of foliar blocking and controlling agent

Abstract

The invention discloses a leaf surface blocking and controlling agent for reducing the content of cadmium and arsenic in rice and a preparation method and application of the leaf surface blocking and controlling agent. Every 1 L of the foliar blocking and controlling agent for reducing the content of cadmium and arsenic in rice is prepared from 40 g to 75 g of monopotassium phosphate, 10 g to 15 g of sodium dodecyl benzene sulfonate, 150 g to 200 g of sodium thiosulfate, 50 g to 80 g of cystine, 20 g to 35 g of citric acid, 40 g to 60 g of nanometer silicon, 20 g to 40 g of manganese sulfate and 5 g to 10 g of isoamyl acetate. According to the invention, a sodium thiosulfate sulfur-containing compound and cystine sulfur-containing nutrient molecules are added to be combined with macro-elements such as phosphorus, potassium, silicon and the like which are necessary for rice production and trace elements such as ion channel regulation and control, and a plurality of modes of inducing synthesis of sulfur-based substances in the rice to be combined with complexing of heavy metal ions, regulation and control of ion channels, competitive inhibition and absorption and the like are combined; the effect of reducing rice heavy metal accumulation is achieved. By adding sodium dodecyl benzene sulfonate and isoamyl acetate, effective absorption of rice to amino acid, sodium thiosulfate, silicon, manganese and other components can be promoted, and the application efficiency of the effective components of the foliar agent and the resistance and control effect of heavy metal cadmium and arsenic are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of plant growth regulators, and particularly relates to a foliar inhibitor and control agent for reducing the content of cadmium and arsenic in rice, and a preparation method and application thereof. Background technique [0002] The heavy metal elements of cadmium and arsenic have strong biological toxicity. The excess rate of pollutants in China's cultivated soil sites is 19.1%, and the excess rate of cadmium and arsenic is about 10%. They are the main pollutants of heavy metals in my country's soil. Rice has the characteristics of enriching heavy metal cadmium and arsenic. The people of our country use rice as the main food every day. The excess of heavy metal cadmium and arsenic in rice has become the main obstacle to the safe production of food in my country, which seriously threatens people's health. At present, the safe production of rice in heavy metal-contaminated rice fields is mainly solved by the...

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Problems solved by technology

[0003] At present, foliar inhibitors mainly include silicon, selenium, and iron-zinc trace element foliar inhibitors. These types of foliar inhibitors still have unstable effects and unclear working mechanisms. Some foliar inhibitors, such as Selenium, iron and zinc trace elements can only be applied to lightly cadmium-polluted paddy fields, but the effect on arsenic is not good

At the same time, most of the current foliar inhibitors are directly dissolved in water and then sprayed on the rice leaf surface, which cannot be effectively adsorbed on the waxy layer of the rice leaf surface and lost, resulting in the loss of effective components and waste. Low application efficiency and poor effect

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