Abstract
AM colonization and growth rate of Acacia melanoxylon in native undisturbed soils and open cast coal mine dumped soils of Singareni coal mines was investigated. The native soil was found to harbour all the six AM fungal endophytes in association with different host plants. Resting spore population was found to be in significant levels. In contrast, AMF spore population was almost absent in dumped soils and the plants habituating these dumps were found to be either non-mycorrhizal or sparsely colonized. Acacia melanoxylon sapling grown in nursery with topsoil of native undisturbed soils have shown good. AM colonization, nodulation and vegetative growth whereas the saplings grown in dumped soils have shown neither the AM infection nor nodulation. A mixture of dumped soil and undisturbed top soil significantly improved the AM infection, resting spores, nodulation and growth of the seedlings. These studies indicate that the saplings grown in topsoil could be employed as a means of reinoculating the AM fungi and thus reclamation of coal mine disturbed soils.
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