A hydroponic method using exogenous iron salt to alleviate the toxic effect of cadmium on tomato and the application of exogenous iron salt

A hydroponics and tomato technology, applied in the application field of exogenous iron salts, can solve practical problems that cannot be solved well, the mechanism of influence has not been thoroughly studied, and reduce the content of available cadmium in soil, etc., so as to improve quality and increase Photosynthetic rate, effect of increasing photosynthetic pigment content

Active Publication Date: 2020-02-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the control of cadmium accumulation through these methods also produced a large number of unavoidable side effects, such as the application of lime to increase the soil pH, while reducing the available cadmium content in the soil, it also reduced a variety of mineral micronutrients such as iron, manganese, copper, The effective content of zinc, etc., is unfavorable for plant growth
And most of them are in the stage of theoretical speculation, failing to solve practical problems well
[0012] At present, there are relatively few studies on solving the heavy metal stress of tomato (especially cadmium stress), because the mechanism of the impact of heavy metals on tomato has not been thoroughly studied, and the corresponding treatment methods are still being explored

Method used

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  • A hydroponic method using exogenous iron salt to alleviate the toxic effect of cadmium on tomato and the application of exogenous iron salt
  • A hydroponic method using exogenous iron salt to alleviate the toxic effect of cadmium on tomato and the application of exogenous iron salt
  • A hydroponic method using exogenous iron salt to alleviate the toxic effect of cadmium on tomato and the application of exogenous iron salt

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Tomato seeds of the same size and plump seeds (purchased from the Chinese Academy of Agricultural Sciences, varieties Liger (cadmium-tolerant) and Tabd (cadmium-sensitive)) were selected, disinfected with 3% sodium hypochlorite solution for 15 minutes, and then rinsed with distilled water for 5 times , evenly placed in a tray with vermiculite, keep sufficient water, and germinate in an artificial incubator at 20°C. At the stage of two leaves and one heart, they were divided into 3 groups. The tomato seedlings in groups 1 and 2 were transferred to hydroponic pots containing 1 / 2 Hoagland nutrient solution, and the tomato seedlings in group 3 were transferred to water culture pots containing 250 μmol L -1 1 / 2 Hoagland nutrient solution of Fe solution in a hydroponic basin, and placed in an automatic control growth chamber for cultivation (16 hours of light, 8 hours of darkness, relative humidity of 40%-60%, temperature of 26±2°C (day) / 20±2°C 2°C (night). After 3 weeks of c...

Embodiment 2

[0075] Tomato seeds of the same size and plump seeds (purchased from the Chinese Academy of Agricultural Sciences, varieties Liger (cadmium-tolerant) and Tabd (cadmium-sensitive)) were selected, disinfected with 3% sodium hypochlorite solution for 15 minutes, and then rinsed with distilled water for 5 times , evenly placed in a tray with vermiculite, keep sufficient water, and germinate in an artificial incubator at 20°C. At the stage of two leaves and one heart, they were divided into 3 groups. The tomato seedlings in groups 1 and 2 were transferred to hydroponic pots containing 1 / 2 Hoagland nutrient solution, and the tomato seedlings in group 3 were transferred to water culture pots containing 220 μmol L -1 1 / 2 Hoagland nutrient solution of Fe solution in a hydroponic basin, and placed in an automatic control growth chamber for cultivation (16 hours of light, 8 hours of darkness, relative humidity of 40%-60%, temperature of 26±2°C (day) / 20±2°C 2°C (night). After cultivating ...

Embodiment 3

[0079] Tomato seeds of the same size and plump seeds (purchased from the Chinese Academy of Agricultural Sciences, varieties Liger (cadmium-tolerant) and Tabd (cadmium-sensitive)) were selected, disinfected with 3% sodium hypochlorite solution for 15 minutes, and then rinsed with distilled water for 5 times , evenly placed in a tray with vermiculite, keep sufficient water, and germinate in an artificial incubator at 20°C. At the stage of two leaves and one heart, they were divided into 3 groups. The tomato seedlings in groups 1 and 2 were transferred to hydroponic pots containing 1 / 2 Hoagland nutrient solution, and the tomato seedlings in group 3 were transferred to water culture pots containing 280 μmol L -11 / 2 Hoagland nutrient solution of Fe solution in a hydroponic basin, and placed in an automatic control growth chamber for cultivation (16 hours of light, 8 hours of darkness, relative humidity of 40%-60%, temperature of 26±2°C (day) / 20±2°C 2°C (night). After 3 weeks of cu...

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Abstract

The invention provides a hydroponic method using exogenous ferric salt to alleviate toxic effects of cadmium to tomatoes and application of the exogenous ferric salt. The method comprises the following steps that tomato seeds are evenly placed in a tray containing vermiculite after being disinfected with a sodium hypochlorite solution; after the tomato seeds grow to the two-leaf one-core period, aFe solution with the concentration of 200-300 umol.L<-1> is added into the hydroponic solution for hydroponic treatment for three weeks. According to the method, the accumulation amount of Cd in thetomatoes under Cd stress is effectively reduced by 46-62.1%. The method improves the quality of the tomatoes.

Description

technical field [0001] The invention belongs to the technical field of vegetable planting, and in particular relates to a hydroponic method for alleviating the toxic effect of cadmium on tomato by applying exogenous iron salt and the application of exogenous iron salt. Background technique [0002] Cadmium (Cd) is a ubiquitous heavy metal and toxic pollutant in the environment. Due to sewage and wastewater irrigation, chemical fertilizer application and rapid industrialization, the area of ​​cadmium-contaminated agricultural areas has increased and the concentration of cadmium in soil has become more and more obvious. [0003] Cadmium is toxic, mutagenic and carcinogenic to most organisms. Its accumulation in soil can cause toxic effects on plants, animals and microorganisms, and affect human health through the food chain. Cadmium can significantly inhibit the activity of soil phosphatase, dehydrogenase and urease, and affect the flora of soil microorganisms, especially ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G31/00A01G7/06C05G3/00C05G5/23
CPCA01G7/06A01G31/00C05D9/00C05G3/00C05D9/02C05G5/20
Inventor 郭军康吕欣魏婷任心豪花莉任倩王小红李艳萍
Owner SHAANXI UNIV OF SCI & TECH
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