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Method for reducing cadmium content of corns through carrying out intercropping with sonchus asper and coupling with passivating agents

A technology of passivating agent and Dipsacanthus chrysanthemum, applied in chemical instruments and methods, botanical equipment and methods, soil preparation methods, etc., can solve the problem of high content of heavy metal Cd in soil, promote absorption and accumulation, be easy to popularize, and ensure food yield effect

Inactive Publication Date: 2019-01-04
YUNNAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the high content of heavy metal Cd in the farmland soil of the grain-mine complex area caused the Cd content in the grain crops to exceed the Cd content limit specified in my country's GB2762-2017 "National Food Safety Standard Contaminant Limits in Food" (Cd≤0.1mg / kg) Technical problem, the present invention provides a kind of simple, easy to grasp, low investment utilization corn (Zea mays L.) and Dipsacanthus chrysanthemum (Sonchus asper L.Hill) intercropping and the method for reducing the cadmium content of corn by coupling with compound passivating agent

Method used

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  • Method for reducing cadmium content of corns through carrying out intercropping with sonchus asper and coupling with passivating agents
  • Method for reducing cadmium content of corns through carrying out intercropping with sonchus asper and coupling with passivating agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Intercropping of corn and Dipsacanthus chrysanthemum+passivator LH

[0018] Materials: The corn variety is "Huidan No. 4", the growth period is 5 months, and the sowing period is mid-to-late April. Dipsacanthus seedlings are collected and stored in the field. The transplanting period is May 7. Due to the long sunshine hours in the area , in order to ensure the survival rate of Dipsacanthus chrysanthemum, water once a day in the morning and evening, and use a sunshade net measure with a shading rate of 70%. After 15 days, the leaves of the chrysanthemum will turn green, resume normal growth, remove the sunshade net, and stop watering. Harvest and samples were collected in late September. Passivator raw materials: lime (expressed in L), sepiolite (expressed in S), humic acid (expressed in H), calcium magnesium phosphate fertilizer (expressed in P).

[0019] Location: Xinjing Village, Jinding Town, Lanping County, Nujiang Prefecture, Yunnan Province, latitude an...

Embodiment 2

[0025] Example 2 Intercropping of corn and Dipsacanthus chrysanthemum+passivator LS

[0026] Embodiment 2 is the same as Embodiment 1 except that the following steps are different.

[0027] (3) spread passivator LS when spreading base fertilizer on the ridge of planting corn, described passivator LS is made up of lime and sepiolite, and the consumption of lime is 150kg / mu, and the consumption of sepiolite is 1500kg / mu, spread passivator LS and mix with soil.

Embodiment 3

[0028] Example 3 Intercropping of corn and Dipsacanthus chrysanthemum+passivator PH

[0029] Embodiment 3 is the same as Embodiment 1 except that the following steps are different.

[0030] (3) spread passivator PH when spreading base fertilizer on the ridge of planting corn, described passivator PH is made up of calcium magnesium phosphate fertilizer and humic acid, and the consumption of described calcium magnesium phosphate fertilizer is 100kg / mu, with In terms of mass fraction, the calcium magnesium phosphate fertilizer contains P 2 0 5 18%, CaO45%, MgO12%, the dosage of humic acid is 1500kg / mu, and the passivator PH that is sprayed is mixed with the soil evenly.

[0031] Control 1: Intercropping of corn and Dipsacus chrysanthemum + passivator LP

[0032] Control 1 was the same as Example 1 except that the following steps were different.

[0033] (3) spread passivator LP while spreading base fertilizer on the ridge of planting corn, described passivator LP is made up ...

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Abstract

The invention discloses a method for reducing the cadmium content of corns through carrying out intercropping with sonchus asper and coupling with passivating agents. The method comprises an intercropping mode of planting corns on ridges and planting sonchus asper in ditches between every two adjacent ridges. A passivating agent LH or a passivating agent LS or a passivating agent pH is applied while a base fertilizer is applied to the corn planting ridges, wherein the passivation agent LH is 150 kg / mu of lime and 1500 kg / mu of humic acid, the passivating agent LS is 150 kg / mu of lime and 1500kg / mu of sepiolite, and the passivation agent pH is 100 kg / mu of calcium-magnesium-phosphate fertilizers and 1500 kg / mu of humic acid. In a stem elongation period of the corns, a phosphatic fertilizerand a potash fertilizer are applied to the corns, and only a base fertilizer is applied to the sonchus asper. According to the method, the corn yield and the farmer income are ensured, and compared with single cropping of corns without application of a passivating agent, single cropping of corns with application of a passivating agent, and interplanting of corns with sonchus asper, the method provided by the invention has the advantages that the pollution caused by the Cd content of corn grains is greatly reduced, so that 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 the Cd content of 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 grain-mine complex areas, industrial and mining enterprises The discharge of waste residue, waste water, waste gas and sewage irrigation, 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 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 agricultural pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/20A01G22/00A01B79/02C09K17/40C09K101/00
CPCA01B79/02A01G22/00A01G22/20C09K17/40C09K2101/00
Inventor 祖艳群朱仁凤李元湛方栋李博陈建军秦丽王吉秀
Owner YUNNAN AGRICULTURAL UNIVERSITY
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