Ecological testing of sugar sorghum varieties in agro-climatic conditions of Russia and Kazakhstan

Abstract. The purpose is to assess the adaptability of sugar sorghum genotypes in various agro-climatic zones cultivation. Methods. reaction rate 8 samples selected by Russian Research and Design-Technological Institute Sorghum Corn was evaluated based on results 2020–2022 test two ecological points: Saratov (Russia, region) Kokshetau (Kazakhstan, Akmola region), characterized different climatic conditions. Methods cultivation plants, accounting for yields are generally accepted sorghum. repetition experiment threefold, placement plots randomized. Results. According statistical analysis, share studied factors overall variability traits established: greatest contribution “plant height” “biomass yield” made factor “ecological testing point” (33.6–58.0 %), “area largest leaf” – “genotype” (31.3 %). It found that conditions Northern Kazakhstan, lower heat moisture availability during (the difference sum active temperatures reached 466.2–769.9 °C, precipitation 17.0–106.1 mm comparison with Lower Volga region Russia), area leaf increased 10.6 cm2 average group at same time, height plants yield vegetative mass decreased 22.2 cm 11.26 t/ha, respectively. At varieties hybrids have been identified form a biomass 20.54–21.44 t/ha period Chayka, Volzhskoe 51, Sakhara, Kalibr. Scientific novelty. For first possibility growing Kazakhstan presented. Thus, according complex parameters combination high productivity, average, 51 variety points environmental testing.