Abstract
The formation of nitrogen-fixing root nodules, plant mass and soybean yield under the use of post-emergence herbicides and their combinations with plant growth regulator Athonic Plus and mіcrofertilizer Nanomix was studied. It was established that application of tank mixtures of post-emergence herbicides had led to the reduction of number and mass of nitrogenfixing nodules on the roots of soybean plants. Application of the Athonic Plus and Nanomix preparations, on the contrary, had promoted studied indices. The maximum soybean yield was observed in the variants with tank mixtures of herbicides Nabob + Fabіan + Mіura and Nabob + Fusillade Forte 150 EC. Combination of Athonic Plus and Nanomix preparations with post-emergence herbicides had resulted in the reduction of the herbicides efficiency against weeds, which had prevented to unleash high yield potential of the crop.
Highlights
It is impossible to get high yield of soybean without the use of herbicides [1]
Farmers are paying great attention to the application of the system of insurance herbicides in soybean crops. This is due to the fact that during the growing season crops it is easier to determine the level and type of weed-infestation and based on the species composition of weeds, you can select specific herbicides
The use of tank mixes of post-emergent herbicides in small norms in the early phases of weeds development is relevant for soybean protection from weeds
Summary
It is impossible to get high yield of soybean without the use of herbicides [1]. Today, farmers are paying great attention to the application of the system of insurance (post-emergent) herbicides in soybean crops. The use of tank mixes of post-emergent herbicides in small norms in the early phases of weeds development is relevant for soybean protection from weeds. This increases the economic and herbicidal efficacy, and makes it possible to significantly reduce the after-effect of some herbicides on these crops and crop rotation to avoid weed resistance to the active ingredient of the preparation [2; 3]. The objective of the research was to study the effect of tank mixes of post-emergent herbicides and combinations of growth regulators and fertilizers on soybean plants ability to form nitrogen-fixing nodules, biomass and yield
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