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2021 Speakers

The use of biological preparations based on strains of nodule bacteria on the productivity of alfalfa in Central Yakutia

Iakovleva Maria Timofeevna, Speaker at Plant Biotechnology Conferences
Yakut Research Institute of Agriculture, Russian Federation
Title : The use of biological preparations based on strains of nodule bacteria on the productivity of alfalfa in Central Yakutia


The influence of strains of nodule bacteria, associative rhizobacteria and isolated active strains that increase the yield of alfalfa and improve the quality of the stern have been studied under the condition of Central Yakutia.

In the conditions of biologization of agriculture, special attention is paid to legumes that are able to create biological nitrogen through their symbiotic apparatus. Alfalfa is a perennial, legume, fodder crop. According to A.A. Soromotina (1993), yakutian yellow alfalfa has been accumulating up to 220 kg per hectare of biological nitrogen on permafrost-taiga soils for 9 years.

I have studied the inoculation of alfalfa seeds with strains of nodule bacteria: 425a, 5562, 415b, 412b and associative rhizobacteria mizorin, agrophil, serracil, pseudomonos. Under the conditions of permafrost soils, the selection and introduction of microorganisms, especially in the early stages of plant development, acquires priority importance. For the first time in the frozen soils of Central Yakutia in 1999, I isolated local strains of nodule bacteria Yakutian No. 1 and Yakutian No. 2.Thus, patent for invention No. 2299188 “A way to increase the yield of green mass of alfalfa” were registered in the State Register of Inventions of the Russian Federation on May 20, 2007. After further research, she received a second patent No. 2537901 “A method of increasing the humus content in soil using the Yakutian No. 2 alfalfa bacteria strain”, registered on November 13, 2014.

The research shows that the pre-sowing inoculation with nodule bacteria of the reconnaissance experience of yakutian yellow alfalfa has a positive effect on the main indicators:
- the prolificness of alfalfa is increased up to 33%;
- the quality of alfalfa is improved up to 19%;
- humus content in permafrost-taiga-pale soil using 425? is 6% higher.

When cultivating alfalfa, on average, using nitrogen-fixing rhizobacteria, the profitability is 48%, the net income is 31000 rubles per hectare.

Audience Take Away:
The use of biological preparations (microorganisms) is able to perform a number of functions:
• improve the mineral nutrition of plants,
• fix atmospheric nitrogen,
• stimulate plant growth,
• suppress phytopathogenic microflora,
• increase plant resistance to stress.
The use of environmentally friendly and cost effective biological products will help you improve the productivity of agricultural


Dr. Iakovleva M.T. graduated from the Omsk Agricultural Institute in 1985. She received her PhD degree in 2007 at the Yakut Research Institute of Agriculture in the Laboratory of Selection and Seed-Growing of Perennial Grasses. Now she is the senior lecturer on general  agriculture and plant growing. She has published more than 60 research articles in scientific journals, a monograph and 5 methodical recommendations.

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