Prediction method of cadmium-nickel compound on root elongation toxicity of wheat in soil and application of prediction method

A prediction method, wheat root technology, applied in measurement devices, biological testing, testing plants/trees, etc., can solve problems such as poor applicability and incomplete assessment of heavy metal toxicity assessment methods

Active Publication Date: 2019-07-16
NANJING UNIV
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Problems solved by technology

[0004] Aiming at the problems of incomplete assessment and poor applicability in existing heavy metal toxicity assessment methods in soil, the present invention provides a method for predicting toxicity of cadmium-nickel compound to wheat root elongation in soil and its application

Method used

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  • Prediction method of cadmium-nickel compound on root elongation toxicity of wheat in soil and application of prediction method
  • Prediction method of cadmium-nickel compound on root elongation toxicity of wheat in soil and application of prediction method
  • Prediction method of cadmium-nickel compound on root elongation toxicity of wheat in soil and application of prediction method

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Embodiment 1

[0086] In the known competing cation of Cd and Ni is H + and Mg 2+ On the basis of the Cd / Ni single stress sand culture experiment, the control variable method was used to change only H + / Mg 2+ The concentration of other cations is kept constant while controlling the concentration of other cations. Afterwards, the Cd-Ni composite stress experiment was carried out to control the other cations in the solution (K + 、Na + , Ca 2+ , Mg 2+ ) concentration remains the same, only the Cd in the solution changes 2+ and Ni 2+ concentration. In order to study a large number of cations (K + 、Na + , Ca 2+ , Mg 2+ ) effect of osmotic pressure on wheat root elongation, the osmotic pressure effect experiment without Cd-Ni stress was carried out, using the control variable method, only changing the concentration of certain cations while controlling the concentration of other cations to remain unchanged. Each treatment group had three replicates. See Tables 3 and 4 for the ionic c...

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Abstract

The invention discloses a prediction method of a cadmium-nickel compound on the root elongation toxicity of wheat in soil and application of the prediction method, and belongs to the technical field of ecological heavy metal toxicity assessment. According to the prediction method, on the basis that known competing cations of Cd<2+> and Ni<2+> are H<+> and Mg<2+>, the toxicity inhibition effect ofthe competing cations and osmotic pressure impact of a saline solution are considered, and the combined toxicity effects of Cd and Ni are calculated by adopting a single toxic concentration addition method. The prediction method includes the steps that firstly, a sand culture experiment is used for obtaining Cd-Ni compound toxicity effect parameters and osmotic pressure effect parameters of the saline solution, and then the obtained parameters are applied to prediction of the Cd-Ni compound toxicity effects in different soil. The prediction method is also applied to prediction of the Cd-Ni compound on the root elongation toxicity effects of other crops, and a new method is provided for soil heavy metal ecological risk assessment and regional soil pollution control.

Description

technical field [0001] The invention belongs to the field of ecological heavy metal toxicity assessment, and more specifically relates to a method for predicting the elongation toxicity of cadmium-nickel compound on wheat root elongation in soil. The prediction model of the elongation toxicity effect of cadmium-nickel compound on wheat root elongation is obtained by sand culture experiment and parameters. This method not only considers the competition effect of heavy metal ions and other cations and biological ligands, but also considers the osmotic pressure effect of soil salt solution. The obtained parameters have a good prediction effect on the toxicity of cadmium and nickel in different soil types. Background technique [0002] According to the 2014 soil environmental quality survey report, cadmium and nickel are the two most serious heavy metal pollutants in my country. In addition, the widespread use of nickel-cadmium batteries has caused serious cadmium-nickel compou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/50G01N33/00
CPCG01N33/0098G01N33/5097
Inventor 顾雪元朱泊静
Owner NANJING UNIV
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