ORGANIC AND BIOFERTILIZERS EFFECTS ON THE RHIZOSPHERE MICROBIOME AND SPRING BARLEY PRODUCTIVITY IN NORTHERN KAZAKHSTAN

Organic fertilizers‟ usage enhances crop productivity and improves soil fertility the surrounding environment in livestock complexes. The presented study assessed effect of biofertilizers poultry-based organic fertilizers on rhizospheric microbial diversity, yield attributes, spring barley (Hordeum vulgare L.). Conducting field experiments started 2021 Northern Kazakhstan's Southern carbonated chernozem steppe zone. Poultry manure application had three doses (5, 10, 15 t ha-1), while four types biofertilizer origin consisted Compo-MIX, Agro-MIX, Agrarka, Trichodermin-KZ. resulted highest number nitrogen-fixing bacteria. By treating seeds with biofertilizers, Agrarka Trichodermin-KZ, organotrophic bacteria dominated rhizosphere. seed treatment fertilizer (at rate 5 10 ha-1) a predominance nonsymbiotic Combined analysis variance revealed that, average, significantly increased plant viability, 1000-grain weight, grain productivity. poultry (10 Trichodermin- KZ gave average values productivity, i.e., 1,550 1,490 kg ha-1 (15.5 14.9 quintal respectively.