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Method for screening cadmium rejection varieties of leaf-edible rapes

A screening method, a cadmium rejection technology, is applied in the field of screening of cadmium rejection varieties of leafy rapeseed, which can solve the problems of differences in heavy metal accumulation capacity and heavy metal content in edible parts that cannot meet the requirements of food hygiene standards, and achieves a simple and safe method. Good quality and safety, economic benefits

Active Publication Date: 2014-06-04
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many studies have found that when the heavy metal content in the soil exceeds the moderate pollution level, the heavy metal content in the edible parts of all test varieties cannot meet the requirements of food hygiene standards; show a large difference

Method used

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  • Method for screening cadmium rejection varieties of leaf-edible rapes
  • Method for screening cadmium rejection varieties of leaf-edible rapes
  • Method for screening cadmium rejection varieties of leaf-edible rapes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Screening experiment of cadmium-rejecting varieties of leafy rapeseed carried out in Tianjin

[0027]The potted experiment site is located in the experimental network room of the Environmental Protection Institute of the Ministry of Agriculture, and there are no pollution sources around the site. The soil for testing was collected from an unpolluted vegetable field in Dongli District, Tianjin. The soil type was fluvo-aquic soil, and its basic physical and chemical properties were: pH 8.01, cation exchange capacity CEC 17.8 cmol / kg, organic matter content 3.55 %, and total Cd content 0.34 mg / kg. kg, and the total Pb content was 27.96 mg / kg. According to the "Soil Environmental Quality Standard", the tested soil was clean soil. The tested rapeseed varieties were provided by Tianjin Academy of Agricultural Sciences, a total of 35 varieties, which are widely planted in Tianjin and its surrounding areas.

[0028] According to the requirements of "Soil Environ...

Embodiment 2

[0039] Example 2: Screening experiment of cadmium-rejecting varieties of leafy rapeseed carried out in Hunan

[0040] The pot experiment site is located in the experimental field of Xiangyin County Agricultural Science Institute, Yueyang City, Hunan Province, and there is no pollution source around the field. The test soil was collected from a nearby unpolluted vegetable field. The basic physical and chemical properties are: pH 6.35, cation exchange capacity CEC 11.2 cmol / kg, organic matter content 4.55%, total Cd content 0.15 mg / kg, total Pb content 35.72 mg / kg, According to the "Soil Environmental Quality Standards", the soil for testing is clean soil. Rapeseed varieties to be tested were purchased from agricultural materials markets in Changsha and Yueyang. There are a total of 32 varieties, all of which are widely planted in the two places and their surrounding areas.

[0041] According to the requirements of "Soil Environmental Quality Standards", when the soil pH is low...

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Abstract

The invention relates to a method for screening cadmium rejection varieties of leaf-edible rapes. The method comprises the steps of 1) performing outdoor open-air cultivation in a potting mode; 2) selecting a plurality of varieties of leaf-edible rapes; 3) selecting uncontaminated soil to add a cadmium salt solution to enable the soil cadmium content to be 0.3mg / kg, 0.6mg / kg, 0.9mg / kg, 1.2mg / kg and 1.5mg / kg when the pH is lower than 7.5 and the soil cadmium content to be 0.6mg / kg, 0.9mg / kg, 1.2mg / kg, 1.5mg / kg and 2.0mg / kg when the pH is higher than 7.5; 4) sowing the rapes and managing growth; 5) harvesting stem leaf portions and analyzing the fresh weight, the dry weight and the cadmium content; and 6) analyzing the stem leaf yield and the cadmium content of different varieties successively from 0.3mg / kg processing to maximum concentration processing, and selecting the cadmium rejection rape varieties under the pollution level, wherein the stem leaf cadmium (Cd) content of the cadmium rejection rape varieties is lower than a food hygienic standard of 0.2mg / kg and the stem leaf yield ratio is not reduced obviously under the pollution processing. According to the method, safe and high-yield cadmium rejection varieties of leaf-edible rapes can be screened, the application range can be obtained, and the method can be effectively used in safety agriculture production.

Description

technical field [0001] The invention relates to the safe production technology of crops under polluted environment, in particular to a screening method for cadmium-repelling varieties of leaf-used rapeseed. Background technique [0002] In recent years, the situation of heavy metal pollution in agricultural soil in my country has become increasingly severe. According to statistics in the 1990s, the area of ​​cultivated land polluted by heavy metals in my country reached 20 million hm 2 , of which cadmium (Cd) polluted farmland amounted to 13,300 hm 2 In 2001, the monitoring results of 320 key polluted farmlands in 24 provinces and cities nationwide by the Ministry of Agriculture showed that heavy metals are the main pollutants in soil and agricultural products, accounting for more than 80% of the total area and total output of agricultural products with pollutants exceeding the standard, while Cd The area of ​​polluted agricultural products exceeding the standard reached 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G1/00
Inventor 王林徐应明梁学峰孙约兵林大松孙扬秦旭
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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