Investigation of the nodule bacteria Rhizobium meliloti and Rhizobium simplex inhabiting spoil dumps

Uzbek, I.K.; Kalantaevskii, V.V.

Mikrobiolohichnyi Zhurnal 60(3): 43-49


ISSN/ISBN: 0201-8462
Accession: 003183052

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Studies were made in 1965-1990 on the nodules of Rhizobium meliloti and R. simplex in lucerne [Medicago sativa] and sainfoin [Onobrychis viciifolia] in plots on spoil dumped in connection with opencast mining of manganese ore in the Dniepropetrovsk region of the Ukraine. The substrates were various types of clays and clay-loams, and mineral fertilizers were applied on some of the plots; the control was on undisturbed southern chernozem. The seed of the lucerne and sainfoin was not inoculated with nodule bacteria before sowing. Data are tabulated on the numbers and weights of nodules per plant (in the 3rd year of life) at depths of 0-40 and 0-100 cm in the various substrates. Mineral fertilizing reduced the virulence (i.e. nodule-forming ability) of the bacteria. The results indicate that nodule formation on these legumes is a reliable way of fixing molecular N and improving the fertility of these reclaimed sites.