LAB TESTS ON EFFICIENCY OF A BIOLOGICAL FERTILIZER BASED ON NITROGEN-FIXING AND PHOSPHATE-MOBILIZING BACTERIA

ЛАБОРАТОРНЫЕ ИСПЫТАНИЯ КОМПЛЕКСНОГО БИОЛОГИЧЕСКОГО УДОБРЕНИЯ НА ОСНОВЕ АЗОТФИКСИРУЮЩИХ И ФОСФАТМОБИЛИЗУЮЩИХ БАКТЕРИЙ
Babak V.A. Zhakupov E.Zh. Puntus I.A. Fomina A.N.
2024 Russian Academy of Agricultural Sciences

Selskokhozyaistvennaya Biologiya
2024 #59 Issue 1 142 - 155 pp.

Soil microbiota has a direct impact on ыoil fertility and composition and, as a consequence, on plant productivity. Currently, agricultural production requirements focus on biological farming the essence of which is to use the potential capabilities of natural ecosystems, in particular soil microorganisms. The most extensive and diverse group of soil microorganisms in properties are free-living and symbiotic nitrogen-fixing bacteria. Another group, phosphate-mobilizing soil microorganisms, participate in the conversion of hard-to-reach inorganic and organic phosphates into water-soluble forms assimilated by plants. Environmentally friendly and safe complex biological fertilizers based on isolates of microorganisms from local natural biogeocenoses are important to increase crop yields and improve soil fertility in the conditions of Kazakhstan. The purpose of the submitted work was a lab assessment of the effectiveness of a combined biological fertilizer based on phosphate-mobilizing and nitrogen-fixing bacteria and its compatibility with some fungicidal and herbicide preparations used in the Republic of Kazakhstan. In pot trials, the biological fertilizer BioAzoPhosfit based on nitrogen-fixing bacteria Raoultella oxytoca MS and phosphate-mobilizing bacteria Serratia plymuthica MS was tested on cucumber seedlings of the Meva variety and spring wheat seeds of the Akmola 2 variety. Tests confirmed the effectiveness of the combined biological fertilizer on cucumber plants according to the main biometric indicators (e.g., length of stem and internodes, number and size of fruits). It was revealed that the average fruit length in the treatment was 12.4 % (p ≺ 0.05) greater than in the control, and the total weight of harvested fruits in the treatment was 20.3 % (p ≺ 0.05) greater than in control. Biofertilizer BioAzoPhosfit showed effectiveness on spring wheat after pre-sowing seed treatment. The treated seeds produced more vigorous shoots (the proportion of seedlings that sprouted by the set date was 5.2 % higher), and the plants from the treated seeds were significantly (p ≺ 0.05) ahead of the control ones in growth and development throughout the entire observation period (by 12-31 %). In lab tests with the main fungicidal (Flamingo, Dividend Extreme) and herbicide (Assoluta, Tribune, Glyphosate and Smerch) preparations used on wheat in Kazakhstan, the combined biofertilizer BioAzoPhosfit showed a decrease in the viability of living microorganisms under the influence of broad-spectrum herbicides Glyphosate and Smerch. All other fungicides and herbicides tested slightly suppressed microbial cultures. Therefore, we recommend not using biofertilizers based on live microorganisms with broad-spectrum herbicides. The results of the tests allow us to recommend the growth and productivity parameters we used in this work for laboratory express testing the quality of microbiological preparation batches.

biological fertilizer , fertility , fungicide , herbicide , nitrogen-fixing bacteria , phosphate-mobilizing bacteria , rhizobacteria

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«BIOTRON Progress» LTT, Akmola Province, Stepnogorsk, Industrial zone 4, complex 7, Stepnogorsk, 021500, Kazakhstan

«BIOTRON Progress» LTT

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