Rice fertilizer-passivator combination capable of preventing and controlling absorption of soil cadmium pollution and application of rice fertilizer-passivator combination

A passivating agent, cadmium pollution technology, applied in organic fertilizers, fertilizer mixtures, applications, etc., can solve the problem of reducing cadmium content, achieve the effect of reducing cadmium content, strong pertinence, and easy application

Inactive Publication Date: 2021-04-30
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: aiming at the defects and deficiencies in the prior art, for paddy fields with high risk of cadmium pollution, through the combined application of different fertilizers and passivators, find a kind of fertilizer that can prevent and control the absorption of soil cadmium pollution. The rice fertilizer-passivator combination and application method solve the problem of safe production of rice in high-risk cadmium-contaminated soil, minimize the cadmium content in rice grains, and achieve the dual benefits of rice high yield and cadmium removal

Method used

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  • Rice fertilizer-passivator combination capable of preventing and controlling absorption of soil cadmium pollution and application of rice fertilizer-passivator combination
  • Rice fertilizer-passivator combination capable of preventing and controlling absorption of soil cadmium pollution and application of rice fertilizer-passivator combination
  • Rice fertilizer-passivator combination capable of preventing and controlling absorption of soil cadmium pollution and application of rice fertilizer-passivator combination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The comparison test of the rice fertilizer combination of heavy metal cadmium polluted soil

[0022] (1) Physical and chemical properties of the test soil:

[0023] The soil used for the test is the experimental field soil of Jiangxi Agricultural University, which is heavy metal polluted soil (depth 0-15cm). The physical and chemical properties of the tested soils are listed in Table 1.

[0024] Table 1 Physical and chemical properties of the tested soil

[0025]

[0026] (2) Settings for experimental processing:

[0027] The potted test soil samples were collected and spread flat on a plastic film, crushed, and debris such as roots and stones were removed, passed through a 10-mesh sieve, mixed and placed in rubber barrels with a diameter of 30 cm and a height of 40 cm. The soil area is 0.07m 2 , 10kg of soil.

[0028] Treatment design: ① milk vetch 100g + chemical fertilizer (FNG30); ② milk vetch 100g + chemical fertilizer + 25g biochar (FNG30C25)...

Embodiment 2

[0045] Example 2: Field Verification of Rice Fertilizer Combination in Heavy Metal Cadmium Contaminated Soil

[0046] (1) Physical and chemical properties of the test soil:

[0047] The soil used for the test is the experimental field soil of Jiangxi Agricultural University, which is heavy metal polluted soil (depth 0-15cm). The physical and chemical properties of the tested soil are the same as in Example 1, see Table 4.

[0048] Table 4 Physical and chemical properties of the tested soil

[0049]

[0050] (2) Setting of experimental processing

[0051] Divide the above heavy metal cadmium contaminated soil into two parts, and set up nitrogen, phosphorus and potassium fertilizer (FN) and milk vetch fresh grass 1500g / m 2 + Biochar 720g / m 2 + Two treatment groups of NPK fertilizer (FNGC). The amount of nitrogen, phosphorus and potassium fertilizers applied is equal, that is, the amount of nitrogen added is 10g / m 2 , including P 2 o 5 4.5g / m 2 , including K 2 O is 7...

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Abstract

The invention discloses a rice fertilizer passivator combination capable of preventing and controlling absorption of soil cadmium pollution and application of the rice fertilizer passivator combination, belongs to the technical field of agricultural resources and environmental protection, and particularly relates to a rice fertilizer passivator combination capable of preventing and controlling absorption of soil cadmium pollution. The combination comprises 300-1500 g/m < 2 > of charcoal, 1000-2000 g/m < 2 > of green manure, a nitrogen fertilizer containing 2-5 g/m < 2 > of N, a phosphate fertilizer containing 3-6 g/m < 2 > of P2O5 and a potash fertilizer containing 5-10 g/m < 2 > of K2O according to the application mass of soil per square meter. Aiming at a rice field with high-risk cadmium pollution, through application of the rice fertilizer-passivator combination capable of preventing, controlling and absorbing soil cadmium pollution, the safety production problem of rice in the high-risk cadmium pollution soil is solved, the cadmium content in obtained rice grains is obviously reduced, and the double benefits of high yield and cadmium removal of rice are achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural resources and environmental protection, and specifically relates to a rice fertilizer-passivator combination capable of resisting, controlling and absorbing soil cadmium pollution and an application thereof. Background technique [0002] Paddy soil is one of the main cultivated soil types in my country. With the development of economy and modern industrialization, the soil pollution of paddy fields is increasing day by day. The heavy metal cadmium in rice field soil is one of the main pollutants that threaten human health. In recent years, rice safety problems caused by cadmium pollution have often been reported. Because it poses a serious threat to human health, it has caused domestic and foreign researchers to pollute cadmium pollution in rice fields. great attention to the problem. [0003] Cadmium is one of the most harmful elements to crops. When crops are poisoned by cadmium, it will h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80A01C21/00
CPCC05G3/80C05B13/02A01C21/005C05C9/00C05D1/02C05D9/00C05F11/00
Inventor 周春火喻成龙倪国荣汤建
Owner JIANGXI AGRICULTURAL UNIVERSITY
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