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Method of safe rice planting on cadmium-contaminated rice field soil by utilizing EDDHA chelate iron fertilizer

A technology for chelating iron and cadmium pollution, applied in fertilization methods, botanical equipment and methods, rice cultivation and other directions, can solve problems such as insufficient guarantee of methods, difficulty in enriching iron elements, etc., and achieves easy operation and simple method. , the effect of increasing iron content

Inactive Publication Date: 2019-12-13
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coupled with the fact that rice is not easy to enrich iron elements, Asians cannot obtain sufficient iron elements through diet

Method used

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  • Method of safe rice planting on cadmium-contaminated rice field soil by utilizing EDDHA chelate iron fertilizer
  • Method of safe rice planting on cadmium-contaminated rice field soil by utilizing EDDHA chelate iron fertilizer
  • Method of safe rice planting on cadmium-contaminated rice field soil by utilizing EDDHA chelate iron fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The method of utilizing EDDHA chelated iron fertilizer of the present embodiment to safely plant paddy rice on cadmium polluted paddy field soil may further comprise the steps:

[0033]Select the cadmium-contaminated paddy field soil with a total cadmium content of 0.8 mg / kg and a pH value of 4. Water the paddy field and keep a shallow water layer of 2cm-3cm.

[0034] 60kg / hm 2 The equivalent amount of EDDHA chelated iron fertilizer is uniformly applied to the above shallow water layer, and the field is plowed to fully mix the EDDHA chelated iron fertilizer with the 0cm-20cm plow layer soil, and continue to maintain a 2cm-3cm flooded state.

[0035] Transplant rice seedlings, manage them according to conventional methods, and harvest rice.

Embodiment 2

[0037] The method of utilizing EDDHA chelated iron fertilizer of the present embodiment to safely plant paddy rice on cadmium-contaminated paddy field soil may further comprise the steps:

[0038] Select cadmium-contaminated paddy field soil with a total cadmium content of 1.2mg / kg and a pH value of 6. Water the paddy field and keep a shallow water layer of 2cm-3cm.

[0039] 120kg / hm 2 After the equivalent of EDDHA chelated iron fertilizer is evenly mixed with nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer, the base is applied to the above shallow water layer. Among them, the nitrogen fertilizer is ammonium bicarbonate, and the fertilization rate is 120kg / hm 2 , the phosphate fertilizer is calcium superphosphate, and the fertilization rate is 60kg / hm 2 , the potash fertilizer is potassium chloride, and the fertilization rate is 100kg / hm 2 . Plow the field, make the mixed fertilizer of above-mentioned EDDHA chelated iron fertilizer, ammonium bicarbonate,...

Embodiment 3

[0042] The method of utilizing EDDHA chelated iron fertilizer of the present embodiment to safely plant paddy rice on cadmium-contaminated paddy field soil may further comprise the steps:

[0043] Select cadmium-contaminated paddy field soil with a total cadmium content of 1.0 mg / kg and a pH value of 5, and irrigate the paddy field and keep a shallow water layer of 2cm-3cm.

[0044] 90kg / hm 2 After the equivalent EDDHA chelated iron fertilizer and nitrogen fertilizer are mixed evenly, the base is applied to the above-mentioned shallow water layer, wherein the nitrogen fertilizer is ammonium bicarbonate, and the fertilization rate is 140kg / hm 2 . Plow the field, make the mixed fertilizer of above-mentioned EDDHA chelated iron fertilizer and ammonium bicarbonate fully mix with the plow layer soil of 0cm-20cm, and continue to keep the flooded state of 2cm-3cm.

[0045] Transplant rice seedlings, manage them according to conventional methods, and harvest rice.

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Abstract

The invention discloses a method of safe rice planting on cadmium-contaminated rice field soil by utilizing an EDDHA chelate iron fertilizer, and belongs to the technical field of remediation of heavymetal contamination of soil. The method of safe rice planting on the cadmium-contaminated rice field soil by utilizing the EDDHA chelate iron fertilizer comprises the following steps that the cadmium-contaminated rice field soil is selected, a rice field is irrigated, and a shallow water layer is kept; uniform basal application of the EDDHA chelate iron fertilizer is conducted on the shallow layer, the field is ploughed, so that the EDDHA chelate iron fertilizer is sufficiently mixed with soil of a plough layer uniformly, and a water flooding state continues to be kept; rice seedlings are transplanted and managed by a conventional method, and rice is harvested. According to the method of safe rice planting on the cadmium-contaminated rice field soil by utilizing the EDDHA chelate iron fertilizer, the EDDHA chelate iron fertilizer is applied to the cadmium-contaminated rice field soil, then the rice is planted, the content of iron elements in rice plants can be increased, cadmium element accumulation of the rice can also be reduced, therefore the iron-enriched low-cadmium rice is produced on the low-cadmium-contamination rice field soil, and the safe production standard of the cadmium content of the rice is met.

Description

technical field [0001] The invention relates to a method for safely planting paddy rice on cadmium-contaminated paddy field soil by using EDDHA chelated iron fertilizer, and belongs to the technical field of soil heavy metal pollution restoration. Background technique [0002] As early as 2011, heavy metals such as cadmium were listed as key pollutants for prevention and control. At the same time, a series of targeted control measures for the total amount of heavy metals in the regional environment were implemented. The overall situation of soil environment in my country is not optimistic, and the total point exceeding the standard rate of the national soil is 16.1%; the pollution type is mainly heavy metals such as Cd, Ni, Hg, As of inorganic type, accounting for 82.8% of all the points exceeding the standard of pollutants , and among the inorganic pollutants, Cd-contaminated soil has the highest rate of point exceeding the standard, reaching 7%. According to the classificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01G7/06A01C21/00C05D9/02
CPCA01C21/005A01G7/06A01G22/22C05D9/02
Inventor 陈喆仇荣亮刘杰游少鸿俞果朱文杰杨畦李茂林
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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