INFLUENCE OF VARIOUS SYSTEMS OF HERBICIDES ON THE SYMBIOTIC ACTIVITY OF SOYA VARIETIES IN THE CONDITIONS OF THE OREL REGION
2017
Yu.V. Beregovaya | Tychinskaya, I.L. | Botuz, N.I. | Lysenko, N.N. | Petrova, S.N.
This paper demonstrates the results of two-year research on the influence of two different herbicide systems: Dual Gold + Bazagran + Fusilad Forte (Complex 1) and Frontier Optima + Bazagran + Aramo 45 (Complex 2) to the symbiotic activity of early ripening soybean varieties Swap and Tanais in conditions of Orel region. In the experiments, background inoculation of the seeds of the studied varieties with a drug of nodule bacteria was used on the basis of the strain Bradyrhizobium japonicum 634b. As a result, it was found that, in general, the herbicides had an inhibitory effect on the legume-rhizobia symbiosis of soybean plants, expressed in a decrease in nodulation of the roots and in the functional activity of the nodules compared with the control. At the same time, the reaction of symbiotic systems to the use of chemical means of protection was variety-specific. It was established that Complex 1 of the two herbicide systems made it possible to fully realize the symbiotic potential of the soybean varieties under study due to the least negative influence on their nodule-forming ability and nitrogen-fixing activity, as a result of which the agrocenoses assimilated up to 38...55 kg / ha of air nitrogen. Complex 1 was also more efficient in terms of economy, ensuring a maximum yield increase, which in average for varieties was 7 c / ha
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