Plant restoring method for removing soil aluminium toxicity

A phytoremediation and soil technology, applied in the field of soil pollution remediation, can solve the problems of removing soil aluminum poisoning that have not been seen yet, and achieve the effect of easy survival, easy planting, and large biomass

Inactive Publication Date: 2010-02-03
SOUTH CHINA BOTANICAL GARDEN CHINESE ACADEMY OF SCI
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  • Abstract
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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

The invention relates to a plant restoring method that can eliminate Al poisons in the soil. The invention is characterized in that: Paspalum notatum FIugge with better absorbing ability for activatedaluminum in soil is chosen, both seeds and seedlings of Paspalum notatum FIugge are suitable, but seedlings are preferred; the invention has the advantages that: 1. Paspalum notatum FIugge has betterabsorbing ability for Al in soil, when the concentration of activated Al in soil is about 1 to 2g / kg, Al contents of roots, stems and leaves of Paspalum notatum FIugge respectively reach about 7-13,2-6 and 3-4g / kg, so as to show obvious enrichment trend; 2. the Paspalum notatum FIugge is broadly introduced and planted in a plurality of provinces and regions in Southern China and is used for conservation of water and soil; furthermore, due to easily obtained seed source and substantial biomass, and being easily planted, easily surviving and easily managed, the Paspalum notatum FIugge is a perfect plant that can be used for eliminating Al poisons in the 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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Patent Type & Authority Patents(China)
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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