Uman NUH | today: 09/04/2019

Nitrogen-fixing bacteria of winter wheat rhizosphere depending on the influence of biologically active substances against different predecessers

Author(s) Hrytsaenko Z.M., Doctor of Agricultural Sciences, Professor, Head of Department of Biology, Uman National University of Horticulture, Uman National University of Horticulture, Ukraine
Voloshyna L., Candidate of Agricultural Science, , Uman National University of Horticulture, Ukraine
Category The Agronomy
year 2013 issue Випуск №82. Частина 1
pages 51-56 index UDK 579.841.2:633.111:632.954:631.811.98
DOI
Abstract In the article the analysis of Azotobacter bacteria which activity in the soil depends on different factors including chemical compounds which are widely used in agriculture is given. It is determined that Azotobacter is sensitive to herbicides, besides the most of them suppress the development of azotobacter of agricultural crops in the initial period after the application of preperations. But the use of growth regulators stimulates the growth of crops and promotes the development of Azotobacter bacteria significantly. We’ve studied out that the presowing treatment of winter wheat seeds with Radostim growth regulator and postemergence apply of Biolan growth regulator effect the growth and development of Azotobacter bacteria positively. Lantselot herbicide 450 WG in the norms of 13, 23 and 33 g / ha used after seedling stage of winter wheat inhibit the growth of azotobacter. In winter wheat rhizosphere the most active growth of Azotobacter microorganisms is observable under the presowing treatment of seeds with Radostim growth regulator (250 ml / t) and postemergence treatment of crops with Biolan growth regulator (20 ml / ha) against the predecessor of perennial grasses. The growth of azotobacter in winter wheat rhizosphere recovers completely on the 25th day after the use of preparations, except for the variant when Lantselot herbicide 450 WG in the norms of 13, 23 and 33 g / ha against non-treated seeds after maize for silage predecessor was used.
Key words Azotobacter bacteria, herbicide, growth regulator, rhizosphere, predecessor
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