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Method for reducing content of cadmium in corn through intercropping with Sedum plumbizincicola and coupling with passivator

A technology of sedum with ore and passivator, applied in chemical instruments and methods, botanical equipment and methods, land preparation methods, etc., can solve the problem of high content of heavy metal Cd, and achieve the effects of reducing toxicity, promoting absorption, and reducing absorption

Inactive Publication Date: 2018-12-07
YUNNAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the high content of heavy metal Cd in the farmland soil of the existing grain-mine complex area, causing the Cd content in the grain crops to exceed the Cd content limit specified in my country's GB2762-2017 "National Food Safety Standard Food Contaminant Limits" (Cd≤0.1mg / kg) To solve the technical problem, the present invention provides a simple, easy-to-master, low-input method for reducing cadmium content in corn by using intercropping of corn and Sedum sedum and coupling with compound passivation agent

Method used

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  • Method for reducing content of cadmium in corn through intercropping with Sedum plumbizincicola and coupling with passivator
  • Method for reducing content of cadmium in corn through intercropping with Sedum plumbizincicola and coupling with passivator
  • Method for reducing content of cadmium in corn through intercropping with Sedum plumbizincicola and coupling with passivator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Intercropping of corn and sedum with ore + passivator LH

[0018] Materials: The corn variety is "Huidan No. 4", the growth period is 5 months, the sowing period is mid-to-late April, and the transplanting period of Sedum sedum seedlings is May 1. Due to the long sunshine hours in the area, in order to ensure the For the survival rate of Sedum sedum, a shade net with a shading rate of 70% was adopted. Harvest and samples were collected in late September. Passivator raw materials: lime (expressed in L), sepiolite (expressed in S), humic acid (expressed in H).

[0019] Location: Xinjing Village, Jinding Town, Lanping County, Nujiang Prefecture, Yunnan Province, longitude and latitude: East longitude 99°38′86″~99°38′90″, north latitude 26°36′53″~26°36′55″. The background value of farmland soil (0-20cm) is: total nitrogen is 1.31g / kg, total phosphorus is 0.60g / kg, total potassium is 24.66g / kg, alkaline nitrogen is 75.74mg / kg, available phosphorus is 71.93mg / kg ...

Embodiment 2

[0026] Example 2 Intercropping of corn and sedum with ore + passivator LS

[0027] Embodiment 2 is the same as Embodiment 1 except that the following steps are different.

[0028] (3) spread passivator LS while spreading base fertilizer on the ridge of planting corn, described passivator LS is made up of lime and sepiolite, and the consumption of described lime is 150kg / mu, the amount of sepiolite The dosage is 1500kg / mu, and the passivator LS is mixed evenly with the soil. The intercropping of corn and Sedum sedum + passivator LS, the Cd accumulation of the above-ground plants of Sedum sedum 1.086mg / plant, increased by 57.16% compared with the single cropping of Sedum sedum, and the method of the present invention reduces the resistance of corn plants to Cd. Absorption, promote the absorption of Sedum sedum to Cd.

Embodiment 3

[0029] Example 3 Intercropping of corn and sedum with ore + passivating agent SH

[0030] Embodiment 3 is the same as Embodiment 1 except that the following steps are different.

[0031] (3) spread passivator SH while spreading base fertilizer on the ridge of planting corn, described passivator SH is made up of sepiolite and humic acid, and the amount of described sepiolite is 1500kg / mu, humic acid The amount of passivator SH is 1500kg / mu, and the passivator SH is mixed with the soil.

[0032] Control 1: Corn monoculture + passivator LH

[0033] Control 1 was the same as in Example 1 except that Sedum sedum with ore was not planted in the ditch between two adjacent ridges.

[0034] Control 2: Corn monoculture + passivator LS

[0035]Control 2 was the same as Example 2 except that Sedum sedum with ore was not planted in the ditch between two adjacent ridges.

[0036] Control 3: Corn monoculture + passivator SH

[0037] Control 3 was the same as Example 3 except that Sedum ...

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Abstract

The invention provides a method for reducing the content of cadmium in corn through intercropping with Sedum plumbizincicola and coupling with a passivator. The method comprises the steps that the intercropping mode that the corn is planted on ridges, the Sedum plumbizincicola is planted in furrows between every two adjacent ridges is adopted, and while a base fertilizer is applied to the ridges where the corn is planted, the passivator LH or the passivator LS or the passivator SH is applied, wherein the passivator LH refers to 150 kg / mu of lime and 1500 kg / mu of humic acid, the passivator LSis 150 kg / mu of lime and 1500 k / mu of sepiolite, and the passivator SH is 1500 k / mu of sepiolite and 1500 kg / mu of humic acid; in the corn stem pushing stage, a phosphatic fertilizer and a potash fertilizer are applied to the corn, and only a base fertilizer is applied to the Sedum plumbizincicola. By means of the method, under the condition that the corn yield and the farmers' income are ensured,compared with corn sole cropping without the passivator, corn sole cropping with the passivator and intercropping of the corn and the Sedum plumbizincicola, the pollution of the cadmium to corn kernels can be greatly reduced, and moreover, the ecological environment is protected.

Description

technical field [0001] The invention belongs to the technical field of agricultural planting, and in particular relates to a planting method for reducing cadmium content in corn. Background technique [0002] The soil heavy metal cadmium (Cd) pollution in my country is mainly caused by the "three wastes" produced by mining, smelting, electroplating, chemical industry and other industries, as well as agricultural measures such as sewage irrigation and unreasonable application of pesticides and fertilizers. Especially in the grain-mine complex area, the waste residue, waste water, waste gas and sewage irrigation discharged by industrial and mining enterprises, as well as the large-scale application of phosphorus fertilizer directly lead to the decline of farmland soil fertility, and the heavy metal pollution in farmland soil is even more serious. According to data, the Cd-polluted area of ​​farmland soil in my country has exceeded 2×10 5 hm 2 , the annual production of agric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/20A01G22/00A01B79/02C09K17/02C09K17/06C09K101/00
CPCA01B79/02A01G22/00A01G22/20C09K17/02C09K17/06C09K2101/00
Inventor 祖艳群陈国皓湛方栋李元吴龙华李博陈建军蒋明
Owner YUNNAN AGRICULTURAL UNIVERSITY
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