Special foliar spray agent for tobacco and preparation method and using method of spray agent

Abstract

The invention discloses a special foliar spray agent for tobacco and a preparation method and a using method of the spray agent. According to the main aims, absorption and transfer of cadmium Cd in tobacco xylem are inhibited by virtue of the foliar spray agent, the Cd content of the tobacco can be simply, rapidly and effectively reduced, and the content of potassium in the tobacco body is increased. With the adoption of the technical scheme in the invention, the special foliar spray agent for tobacco comprises n liters of mixed solution consisting of 0.005n-0.015n liter of a coalescing agent and 0.985n-0.995n liter of water, wherein 0.5n-1.5n grams of potassium fulvate and 0.2n-0.4n gram of zinc sulfate are dissolved in the n liters of mixed solution, and n is more than 0. The preparation method comprises the following steps: oscillating and uniformly shaking the n liters of mixed solution dissolved with the potassium fulvate and zinc sulfate, and forming the special foliar spray agent for tobacco. The special foliar spray agent for tobacco is sprayed to tobacco leaves until the tobacco leaves are mature according to the preset time interval.

Description

technical field [0001] The invention relates to a spray, in particular to a tobacco-specific foliage spray, a preparation method and a use method. Background technique [0002] Cadmium (Cadmium, Cd) has strong biological toxicity and is listed as the first class carcinogen by the World Organization for Cancer Research. The main sources of Cd in my country's farmland are atmospheric deposition, high-cadmium phosphate fertilizers, livestock and poultry manure, sewage irrigation, etc., and the Cd content in the soil increases at a rate of 0.004 mg / kg per year. Therefore, Cd should be the primary monitoring element for farmland environmental risks. In 2014, a "National Soil Pollution Survey Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources also pointed out that the rate of soil Cd pollution points exceeding the standard was the highest, reaching 7.0%. Cd in polluted soil has strong activity, is easily absorbed by plants, and end...

AI Technical Summary

Problems solved by technology

However, these technologies have some disadvantages. For example, in the tobacco restoration technology, the selection of hyperaccumulator tobacco is random, the procedure is cumbersome, and the genetic stability of hyperaccumulation ability cannot be guaranteed; It takes a long time for the soil Cd concentration to reach the remediation target; after hyperaccumulator tobacco enriches Cd, improper handling of tobacco residues will cause secondary pollution

In the in-situ passivation technology, the components of the passivating agent are complex and difficult to commercialize, and the long-term effect of reducing the Cd content of field tobacco is not verified. At the same time, the in-situ passivation technology has not completely reduced the Cd content in the soil. The change is likely to cause the fixed and adsorbed Cd to re-transform into a more active form, which is reabsorbed by tobacco, causing secondary pollution

In the application of antagonistic element technology, the effect of reducing tobacco Cd content is small, and it can only be used as an auxiliary means to reduce tobacco Cd content