Foliar fertilizer for reducing cadmium in rice, fertilizing method of foliar fertilizer and application of foliar fertilizer

A fertilization method and foliar fertilizer technology, applied in the fertilization method, application, fertilization device and other directions, can solve the problems of insignificant effect, small biomass, difficult to popularize, etc., to increase rice disease prevention, reduce cadmium accumulation, reduce Cadmium effect is remarkable

Inactive Publication Date: 2020-08-04
湖南玖恪环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical methods mainly include: foreign soil, soil replacement, deep plowing and electric repair method, etc. This method has the advantages of thorough effect and stability, but the contaminated soil area to be treated is large, the implementation is complicated, and the cost is high, and the piled soil that has been replaced is also expensive. One problem is that the actual restoration is difficult to promote; the chemical methods mainly include: rinsing, curing and stabilization, redox, etc. This method is quick and effective, but cadmium is easy to reactivate. At the same time, some chemical reagents themselves are also a kind of pollutant. The soil environment is easy to cause secondary pollution; agricultural measures include: changing the farming system, adjusting crop varieties, and replacing plants that do not enter the food chain. It is difficult for farmers to accept and popularize the production of cadmium in the soil; the extraction of soil cadmium by hyperaccumulative plants is also a low-cost and environmentally friendly technology, but there are still some problems such as the small biomass of the above-ground parts, limited by seasons, and no reuse value. Disadvantages such as poor economic benefits

Method used

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  • Foliar fertilizer for reducing cadmium in rice, fertilizing method of foliar fertilizer and application of foliar fertilizer
  • Foliar fertilizer for reducing cadmium in rice, fertilizing method of foliar fertilizer and application of foliar fertilizer
  • Foliar fertilizer for reducing cadmium in rice, fertilizing method of foliar fertilizer and application of foliar fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh the above-mentioned substances according to 7g, 70g, and 70g of raw materials potassium fulvic acid, urea, and potassium dihydrogen phosphate per mu, mix them evenly, and dissolve them in 59kg Foliar fertilizer can be prepared in water.

[0039] (2) The field test site was selected in a farmland in Liling, Hunan. Before rice planting, the soil samples of the farmland were taken according to the five-point method, and the soil pH and cadmium background values ​​were measured to be 4.82 and 0.83 mg / kg respectively, which belonged to moderately acidic farmland. .

[0040] (3) Divide the farmland into experimental plots, each with an area of ​​18m×7m. The rice variety is Tianyouhuazhan, a commonly used local rice variety, purchased from the local seed market. Seedlings were raised in early June and transplanted in early July. The rice seedlings were transplanted in plots according to the planting density of 25cm×25cm, and each experiment was provided with three...

Embodiment 2

[0044] The test site was selected in a farmland in Jiaoxi, Liuyang. The soil pH was 5.64, and the background value of soil cadmium was 0.75mg / kg. After the material was mixed evenly, it was dissolved in 30kg of water, and all the other implementation steps were consistent with Example 1. Finally, the content of cadmium in the paddy and brown rice in the blank and spraying foliar fertilizer treatment plots was measured.

Embodiment 3

[0046] The test site is selected in a farmland in Liling, Hunan Province. The soil pH is 4.72, and the background value of soil cadmium is 1.5mg / kg. The above materials are weighed according to 1g, 25g, and 25g of raw materials potassium fulvic acid, urea, and potassium dihydrogen phosphate per mu. , after mixing evenly, be dissolved in 35kg water, all the other implementation steps are consistent with example 1, finally record the content of cadmium in the blank and the rice brown rice in the treatment plot of spraying foliar fertilizer.

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Abstract

The invention relates to the technical field of agricultural fertilizers, and discloses a foliar fertilizer for reducing cadmium in rice; the foliar fertilizer is composed of 1-5 parts by weight of potassium fulvate, 5-25 parts by weight of urea and 5-25 parts by weight of potassium dihydrogen phosphate. The invention further provides a fertilizing method of the foliar fertilizer and an application of the foliar fertilizer to reduction of cadmium in rice. The foliar fertilizer provided by the invention can reduce the cadmium content of farmland exceeding the standard by 37.9%, effectively reduces the transfer of cadmium into grains, and has the advantages of small dosage, low cost and no negative influence on soil or farmland environment.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a foliar fertilizer for reducing cadmium in rice. In addition, the invention also relates to a fertilization method of foliar fertilizer and its application in reducing rice cadmium. Background technique [0002] Cadmium is a toxic heavy metal element that is seriously harmful to the human body. After entering the human body, it can accumulate in the liver, kidney, bones and other organs, causing damage to these systems and even cancer. Generally, the concentration of cadmium in environmental soil is very low, and the background value of cadmium in soil in China is 0.096mg / kg. However, with the progress of urbanization and industrialization, the problem of soil cadmium pollution is becoming more and more serious. In 2014, the Ministry of Land and Resources issued a bulletin on the main data results of the second national land survey, indicating that about 50 mil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00A01G22/22A01C21/00
CPCA01C21/005A01G22/22C05B7/00C05C9/00C05F11/02
Inventor 向波
Owner 湖南玖恪环境工程有限公司
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