Rehabilitation of Artisanal Mining Gold Land in West Lombok, Indonesia: 2. Arbuscular Mycorrhiza Status of Tailings and Surrounding Soils

B. Prasetyo, B. Dewi Krisnayanti, Wani Hadi Utomo, C.W.N. Anderson

Abstract


Artisanal mining plays an important role in the Indonesia economy; however, it has created serious environmental
destruction. The prohibition of artisanal mining is not a wise policy and never works. A more valuable strategy is
to encourage artisanal mining; however, the associated poor health, safety, and environmental conditions must be
improved. Therefore, effective rehabilitation of the environment post mining is essential. Phytoremediation is
considered to be one method to achieve this rehabilitation. In this method, the interaction of plant roots with
mycorrhiza is one of the key determinants of successful rehabilitation. A study to identify the indigenous
mycorrhiza present in soil was carried out at an artisanal gold mining region at Sekotong, West Lombok, Indonesia.
Soil samples were collected from the rhizosphere of a selection of indigenous plant species for the identification of
the associated mycorrhizal fungi. Rhizosphere samples were collected from a normal agricultural soil as well as
waste rock and mine tailings. The plants studied were Acassia sp, Gmelina arborea, Leucaena glauca, Tectonia
grandis, Manihot utilissima, and Zea mays. There was an abundance of mycorrhizal fungi species associated with
all observed plants, with the dominant genus being Glomus. The spore density varied from 77 – 240 spores/100g in
natural soils, with the percentage of infected roots varying from 10 to 40%, and decreasing as the soil was
disturbed. Some of these mycorrhizal fungi showed a relatively good ability to grow in the heavy metal
contaminated gold mine tailing.


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Journal of Agricultural Science ISSN 1916-9752 (Print) ISSN 1916-9760 (Online)

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