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Plant restoring method removing soil aluminium toxicity

A phytoremediation and soil technology, applied in the field of soil pollution remediation, can solve problems such as removal of aluminum poisoning in soil that has not yet been seen, and achieve the effects of easy survival, strong absorption capacity, and easy planting.

Inactive Publication Date: 2008-05-21
SOUTH CHINA BOTANICAL GARDEN CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no technology or effective method for removing soil aluminum poisoning at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: In a mining area in the west of Guangdong, the average concentration of active Al in the soil is 1.2g / kg. Al poisoning is relatively serious, and it is difficult for general plants to grow. 0.1 hectare of soil was used for the experiment. First, the site was prepared, weeds were removed, and then:

[0013] 1. Select bahiagrass seedlings without pests and diseases for stem node cutting propagation. First remove most of the leaves on the cuttings, then fold them into small sections about 10cm long, and insert the cuttings obliquely into the soil at a row spacing of 15cm×15cm. , the insertion depth is 5-7cm;

[0014] 2. After 4 months of Bahia grass growth, the Al content in stems and leaves reaches about 3.8g / kg and 3.4g / kg respectively. Harvest the aboveground parts, but still leave about 4cm of stems and leaves, and incinerate the harvest after landfill;

[0015] 3. Apply 30-40kg of urea after each harvest, and apply it in 2 times. After about 2.5 months, th...

Embodiment 2

[0017] Embodiment two: in the area of ​​embodiment one, do experiment with 0.1 hectare of soil, first prepare the ground, remove weeds, then select Bahia grass seed for use, by 20g / m 2 Density sowing, other harvesting, fertilization and other measures are the same as in Example 1, and the effect of reducing the content of active aluminum in the soil very close to that in Example 1 is obtained.

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Abstract

A kind of phytoremediation method of removing soil aluminum poisoning, it is characterized in that, select Paspalum notatum FIugge (Paspalum notatum FIugge) that has strong absorbability to soil active aluminum, seed or seedling all can be, preferably with seedling; The advantages are: 1. Bahiagrass has a strong ability to absorb Al in the soil. When the active Al concentration in the soil is about 1-2g / kg, the Al content in the roots, stems, and leaves of Bahiagrass are as high as 7-13, 2 ~6, 3~4g / kg, showing an obvious enrichment trend; 2. Bahia grass is widely introduced and cultivated in many provinces and regions in southern my country for water and soil conservation and as forage grass. The provenance is easy to obtain, and its It has large biomass, is easy to plant, easy to survive, and easy to manage, so it is a very ideal plant that can be used to remove Al poisoning from soil.

Description

technical field [0001] The invention relates to soil pollution remediation, that is, a phytoremediation method for removing soil aluminum poisoning. Background technique [0002] In the vast southern red soil area of ​​China, due to the acidic leaching caused by high temperature and rainy conditions, the content of active aluminum in the soil is obviously high, which results in great toxicity to forest ecosystems and crops. In recent years, with the development of industry, the extensive use of agricultural chemical fertilizers, and the increasing acid rain, the degree of acidification of the soil has increased, and the amount of aluminum ions in the soil has also increased significantly, especially in the large area of ​​acidic soil in my country. Among them, the dissolution of aluminum ions was larger, which resulted in the aggravation of plant aluminum toxicity. But at present, there is no technology or effective method to remove soil aluminum poisoning at home and abroad...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 夏汉平黄娟李志安孔国辉
Owner SOUTH CHINA BOTANICAL GARDEN CHINESE ACADEMY OF SCI
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