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Method for repairing cadmium contaminated farmland soil through intercropping of Sedum plumbizincicola and cicla cv.Dracaeni-folia

A technology for cadmium-contaminated soil and sedum with ore is applied in the field of phytoremediation of slightly cadmium-contaminated farmland soil and heavy metal pollution in the soil by using intercropping of sedum with ore and red sedum, which can solve the problem of limiting restoration efficiency and practical promotion. Application value, slow growth of hyperaccumulators, secondary environmental pollution, etc., to achieve the effects of preventing soil erosion, high social acceptability, and beautifying the environment

Inactive Publication Date: 2019-01-15
GUIZHOU INST OF SOIL & FERTILIZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In phytoremediation technology, it is a relatively common method to use heavy metal hyperaccumulator plants to extract heavy metals from polluted soil. Its restoration efficiency and practical promotion and application value
In recent years, a large number of scholars have increased the activity of heavy metals in the soil by adding some chelating agents, and promoted the accumulation of soil heavy metals in plants. secondary pollution

Method used

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  • Method for repairing cadmium contaminated farmland soil through intercropping of Sedum plumbizincicola and cicla cv.Dracaeni-folia
  • Method for repairing cadmium contaminated farmland soil through intercropping of Sedum plumbizincicola and cicla cv.Dracaeni-folia
  • Method for repairing cadmium contaminated farmland soil through intercropping of Sedum plumbizincicola and cicla cv.Dracaeni-folia

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: pot experiment

[0017] Soil for test: Collected from a cadmium-polluted cultivated layer 0-20cm mixed soil sample in a plot in Zunyi City, the sample was air-dried indoors, plant roots and stones were removed, passed through a 5mm nylon sieve, and set aside. Some of them were ground through a 10-mesh nylon sieve to measure soil pH, and some were ground through a 100-mesh sieve to determine soil total nitrogen, available nitrogen, available phosphorus, available potassium, organic matter, and total Cd content. The basic physical and chemical properties of the soil are shown in Table 1. The plant species tested: Sedum sedum and red sedum.

[0018] Table 1 Basic physical and chemical properties of the tested soil

[0019]

[0020] Experimental design: Randomized block experimental design was adopted, and it was completed in the intelligent greenhouse of the Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences. Three treatments were...

Embodiment 2

[0023] Embodiment 2: field test

[0024] The test site: select the cultivated land slightly polluted by cadmium, the basic physical and chemical properties of the soil are shown in Table 2. The plant species tested: Sedum sedum and red sedum.

[0025] Table 2 The basic physical and chemical properties of the soil in the test field

[0026]

[0027] Design of the experiment: designed according to the principles of field repetition, random arrangement and local control, with 3 treatments, 3 repetitions, and a plot area of ​​20m 2 . Treatment 1 with Sedum sedum monoculture (planting density: 20cm×20cm); treatment 2 with sedum sedum (planting density: 20cm×20cm)+red sedum intercropping (transplanting density 40cm×60cm); treatment 3 control group without Grow any plant.

[0028] Fertilization and agronomy: first level the soil in the field, and then divide the field into 9 plots (area 5m×4m) according to the random arrangement, and according to the experimental treatment gro...

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Abstract

The invention discloses a method for repairing cadmium contaminated farmland soil through intercropping of Sedum plumbizincicola and cicla cv.Dracaeni-folia. The method comprises the steps: repairingplants, namely the Sedum plumbizincicola and the cicla cv.Dracaeni-folia are planted in the cadmium mildly contaminated soil in an intercropping mode; cadmium in the soil is absorbed and transferred to the ground parts of the repairing plants through the repairing plants; and the ground parts of the repairing plants are moved away regularly, the content of cadmium ions in the contaminated soil isgradually decreased, and thus the cadmium contaminated soil is repaired. The selected Sedum plumbizincicola belongs to a perennial herb with the high vitality, the cicla cv.Dracaeni-folia is high in adaptability to the living environment and low in requirements for water, fertilizer and the soil quality, the Sedum plumbizincicola and the cicla cv.Dracaeni-folia both can easily survive in the contaminated soil and do not need to be specially managed in the growth process, the ground parts naturally reproduce and grow, and heavy metal in the soil can be transferred efficiently to the ground parts of the plants, so that the content of the heavy metal in the soil is decreased.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and in particular relates to a phytoremediation technology polluted by heavy metals in soil, in particular to a method for repairing farmland soil slightly polluted by cadmium by intercropping sedum sedum and red spinach. Background technique [0002] In recent years, with the acceleration of industrialization and urbanization, soil heavy metal pollution has seriously threatened the ecological environment and human health. One of the serious heavy metals. The results of the first nationwide soil pollution survey show that 19.4% of the cultivated land soil points exceed the standard, and among the cultivated land with points exceeding the standard, the proportions of slightly, lightly, moderately and heavily polluted points are 13.7%, 2.8%, and 1.8% respectively. and 1.1%, and from the perspective of pollutants exceeding the standard, the heavy metal cadmium point exceedin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 刘桂华范成五秦松敖明柴冠群
Owner GUIZHOU INST OF SOIL & FERTILIZER
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