RESUMO
The effects of G. mosseae, G. geospora, G. constrictum and bacteria on diesel tolerance of Tagetes erecta were investigated under greenhouse conditions. The results showed that AM fungi could still develop mycorrhizal assosiations with mum when the diesel concentration was 5,000 mg.kg-1. White mum was better than yellow mum in diesel tolerance, with 63.1% total biomass increased. The colonization rate of inoculating AM fungi treatment was 3.5%-29.9% higher than the control. G. mosseae and G. geospora were better strains, their biomass increasing 9.0% and 42.7% than the control, respectively, while the effect of inoculating mixed AM fungi was not obvious. Bacteria inhibited the colonization of arbuscular mycorrhizal fungi on white mum, but promoted the vegetative and reproductive growth of mycorrhizal mum. Among 5 inoculation treatments, treatments of inoculating G. geospora and inoculating mixed AM fungi and bacteria were better, with 16.51% and 14.05% more diesel degradation rate than that of the control, respectively.
Assuntos
Gasolina , Micorrizas/metabolismo , Tagetes/crescimento & desenvolvimento , Tagetes/microbiologia , Biodegradação AmbientalRESUMO
Pot experiment with discarded greenish mudstone from large opencut coal mine as test soil was conducted to study the application of ectomycorrhizal fungi in the ecological reconstruction of fragile ecological belt of large opencut coal mine of Huolinhe region, Inner Mongolia. The result showed that after the greenish mudstone was inoculated with ectomycorrhizal fungi, the rates of seedling infection and survival were 1.21-2.78 higher in treatment with no fertilizer application than in that with fertilizer application. The test ectomycorrhizal inoculum 010, A and B had a stronger regulation ability in infertile and low penetration coefficient soil. The ammonification of the mudstone could improve its physical and chemical properties, but shorten the survival duration of seedling on account of the accumulation of ammonia and phosphorus in it.
