• • • The effect of associative rhizobacteria-based bio-preparations on oat productivity and soil fertility in Central Yacutia
The research was conducted in the Republic of Sakha (Yakutia) in 2013–2015. The use of associative rhizobacteria-based preparations is an environmentally friendly way to increase crop yields and improve soil fertility. It was studied the effect of pre-seeding inoculation of oat seeds of the “Pokrovsky” variety with various preparations based on rhizobacteria strains — “Mizorin”, “Agrofil” and “Rizoagrin”. The sample without inoculation was the standard. Inoculation of seeds contributed increase in productivity and to an accumulation of plant biomass. In the experimental samples, a significant increase in crop yield was observed: from 1.5 to 1.7–1.9 t ha-1. In Central Yakutia, cryogenic soil with low humus content is widespread. Before sowing, an agrochemical analysis of the soil was carried out: humus content was 1.84%, exchange potassium — 255, phosphorus — 217 mg/kg of soil. Pre-seeding inoculation of oat seeds with the “Mizorin” preparation led to an increase in the soil’s humus content of 2.5%, while in the control sample a slight increase in the humus content of 1.9% was observed. The «Rizoagrin» preparation significantly influenced the content of exchangeable potassium in the soil: it was 300 mg/kg of soil after crop cultivation. The content of exchange phosphorus did not differ from one sample to another. Thus, the use of the studied associative rhizobacteria-based preparations had a positive effect on both growth and development of plants and fertility of cryogenic soils.
Source: http://kormoproizvodstvo.ru/en/1-2019-2/, p. 17
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