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Application of Jujun grass on repairing soil with heavy mental cadmium pollution

A technology for remediating soil and giant fungus grass, which is applied in the field of remediation of heavy metal pollution in the environment, can solve problems such as insufficient phytoremediation, and achieve the effects of easy post-treatment of phytoremediation, rapid growth, and simple planting techniques

Inactive Publication Date: 2013-02-27
SICHUAN AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the purpose of the present invention is to address the above-mentioned problem of insufficient phytoremediation of heavy metal-contaminated soils, and to provide a new plant variety, Jujuncao, for use in remediating soil heavy metal cadmium pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1 Pot stress test

[0014] The test site was set at the potting field of Chengdu Campus of Sichuan Agricultural University. Using potting to simulate soil heavy metal pollution, the seedlings of Pennisetum genus Gramineae were transplanted into potting soil polluted with gradient concentrations of heavy metal cadmium. The experiment started in May, and the transplanted Jujuncao seedlings were tissue-cultured seedlings transplanted in the experimental greenhouse of Wenjiang Campus of Sichuan Agricultural University, with 1 plant per pot and 4 repetitions. There are 4 treatments in the test, respectively CK (no Cd added) and 5mg / kg (low) and 120mg / kg (high) 2 different dosing concentration tests, and the analytical pure heavy metal reagent CdCl is added in solid state 2 2.5H 2 O, mix well, and keep it in balance for four weeks before use. Giant Juncao is cultivated in the net room greenhouse, and the management method is the same as the general management of Gia...

Embodiment 2

[0019] Example 2 Soil remediation test in plot

[0020] The test site is the teaching and research farm community of Ya'an Campus of Sichuan Agricultural University. The soil was collected from the tailings waste soil of the smelter in Fuquan lead-zinc mining area, Hanyuan County, Sichuan Province. The cadmium content was 63.04 mg / kg. The specific method was: in mid-May Plant the giant Juncao seedlings with a plant height of 10-13cm in a pond with a size of 2m×2m×3m, with a plant spacing of 25cm and a row spacing of 30cm; the amount of base fertilizer applied per mu is 10-12kg of pure nitrogen, 7-8kg of phosphorus pentoxide, potassium oxide 7-7.5kg; topdressing every 60 days: 4-5kg of pure nitrogen per mu; after 150 days, harvest the giant fungus grass planted and leave the roots to germinate. The cutting height is 10-13cm. 7-8kg of pure nitrogen, 4-5kg of phosphorus pentoxide, and 5-6kg of potassium oxide; the measured biomass of the aboveground part is 335.00g / plant, the con...

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PUM

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Abstract

The invention discloses application of Jujun grass on repairing soil with heavy mental cadmium pollution. The application method comprises the steps of; directly transplanting cultivated pennisetum plant Jujun grass seedlings with the heights of 10-13cm in heavy metal cadmium-polluted soil every spring, wherein the plant spacing is 25cm and the row spacing is 30cm; applying a base fertilizer, wherein the base fertilizer amount per mu is as follows: 10-12kg of pure nitrogen, 7-8kg of phosphorus pentoxide and 7-7.5kg of potassium oxide; watering in the plant cultivation period and topdressing every 60 days due to the demand of growing o f the large Jujun grass in the later period, wherein the watering amount is 7-8.5kg per mu and the topdressing amount is 4-5kg of the pure nitrogen per mu; and after the Jujun grass grows for 100-150 days, harvesting the overground part of the Jujun grass and leaving the root of the Jujun grass for sprouting. The Jujun grass has the characteristic of remarkably enriching the heavy mental cadmium and is capable of effectively utilizing the cadmium-polluted soil while continuously repairing the soil with the heavy mental cadmium pollution permanently at the same time.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution in the environment, in particular to the application of Pennisetum genus Jujuncao in remediation of heavy metal cadmium pollution in soil. Background technique [0002] Cadmium (Cd) exists widely in the soil for a long time, and its mobility is poor, and it is not easy to be biodegraded. It has a toxic effect on plants, and will eventually endanger human health when it spreads through the food chain. Therefore, it is particularly important and urgent to solve the problem of soil heavy metal cadmium pollution. [0003] At present, phytoremediation technology has become a reliable, safe and environmentally friendly soil heavy metal remediation technology because of its low cost, simple operation, no damage to soil structure, and no secondary pollution. However, this technology is based on the premise of screening plants that can accumulate heavy metals, and the selected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 张世熔田玉珂杨雪梅徐小逊李婷黄成毅蒲玉琳李云
Owner SICHUAN AGRI UNIV
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