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Southern ion rare earth waste tailing vegetation restoring method

An ionic rare earth and vegetation restoration technology, which is applied in the field of vegetation restoration of ionic rare earth waste tailings in the south, can solve the problems of unable to change the soil quality of the matrix, break the ecological balance, etc., and achieve the effect of good vegetation growth.

Inactive Publication Date: 2014-12-03
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are few successful cases of vegetation restoration in southern ionic rare earth mines. Vegetation restoration can only be achieved by laying thick foreign soil and planting eucalyptus, vetiver and other exotic species on the foreign soil. However, this restoration method cannot change the substrate. The soil quality of the soil, and the introduction of alien species will disrupt the local ecological balance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Plant according to the ratio of 10% slash pine + 24% bamboo + 66% awn. The row spacing of slash pine is 1.5m×1.5m. Plant a row of five-section awns in between.

[0027] Judging from the situation two months after the vegetation restoration, the vegetation is growing well, and the overall coverage rate has reached more than 90%. The comparison of various soil indicators before vegetation restoration and two months after restoration shows that vegetation restoration has significantly improved soil quality.

[0028] Before vegetation restoration: water content = 9%, pH = 4.93, organic matter content = 2.41%, ammonium nitrogen = 6.68 (mg / kg), nitrate nitrogen = 1.09 (mg / kg), total organic carbon = 1.95 (g / kg), total nitrogen = 0.47 (g / kg), total phosphorus = 0.01 (g / kg), microbial biomass carbon = 3.87 (mg / kg), microbial biomass nitrogen = 1.08 (mg / kg).

[0029] After vegetation restoration: water content = 41%, pH = 4.75, organic matter content = 8.49%, ammonium nitr...

Embodiment 2

[0031] Vegetation restoration is carried out according to the ratio of 10% navel orange + 23% Osmanthus fragrans + 67% Bahia grass. The distance between navel oranges is 2.0m×2.0m.

[0032] Judging from the situation two months after the vegetation restoration, the vegetation growth is excellent, and the overall coverage rate has reached more than 95%. The comparison of various soil indicators before vegetation restoration and two months after restoration shows that vegetation restoration has significantly improved soil quality.

[0033] Before vegetation restoration: water content = 9%, pH = 4.93, organic matter content = 2.41%, ammonium nitrogen = 6.68 (mg / kg), nitrate nitrogen = 1.09 (mg / kg), total organic carbon = 1.95 (g / kg), total nitrogen = 0.47 (g / kg), total phosphorus = 0.01 (g / kg), microbial biomass carbon = 3.87 (mg / kg), microbial biomass nitrogen = 1.08 (mg / kg).

[0034]After vegetation restoration: water content = 32%, pH = 4.63, organic matter content = 6.87%, ...

Embodiment 3

[0036] The vegetation is planted according to the ratio of 10% eucalyptus + 23% awn + 67% bahia grass. The distance between the eucalyptus trees is 1.5m×1.5m. A row of bahia grass is planted between the eucalyptus trees, and a row of awns is placed between the eucalyptus and bahia grass.

[0037] Judging from the situation two months after the vegetation restoration, the vegetation growth is excellent, and the overall coverage rate has reached more than 95%. The comparison of various soil indicators before vegetation restoration and two months after restoration shows that vegetation restoration has significantly improved soil quality.

[0038] Before vegetation restoration: water content = 9%, pH = 4.93, organic matter content = 2.41%, ammonium nitrogen = 6.68 (mg / kg), nitrate nitrogen = 1.09 (mg / kg), total organic carbon = 1.95 (g / kg), total nitrogen = 0.47 (g / kg), total phosphorus = 0.01 (g / kg), microbial biomass carbon = 3.87 (mg / kg), microbial biomass nitrogen = 1.08 (mg...

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Abstract

A southern ion rare earth waste tailing vegetation restoring method is characterized in that different vegetations are planted on an ion rare earth waste tailing in a match mode to form a vegetation restoring combination. Ecological landscape and ecological system service functions of a waste land are restored by using the match and combination of different plants, the vegetation coverage is increased and the biodiversity index of a restored area is improved.

Description

technical field [0001] The invention belongs to the restoration technology in the field of environmental ecology, and in particular relates to a vegetation restoration method for abandoned tailings of ionic rare earths in the south. Background technique [0002] Rare earth elements refer to the lanthanum (La) series elements with atomic numbers from 57 to 71 in the periodic table of chemical elements, as well as scandium (Sc) elements and yttrium (Y) elements with similar properties, a total of 17 elements. Because of their active chemical properties, rare earth elements are called "industrial vitamins" and can be widely used in industry, agriculture, electronics and other fields. Rare earth elements mainly exist in rare earth ores in the form of rare earth oxides or rare earth ions. Among them, ion-adsorption rare earth ores were discovered in the 1970s. Because most of the deposits are located in southern China, they are also called southern ion rare earths. The ore has t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00
Inventor 葛刚蔡奇英刘以珍陈熙王秀峰李永绣
Owner NANCHANG UNIV
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