Identification of the photosynthetic potential of spring oat varieties in the Lower Volga Re-gion

In 2017-2019, in the agro-climatic conditions of the Lower Volga region, the experience of studying spring oat varieties of different ecological and geographical origin from the world collection of VIR was laid, in order to determine their photosynthetic potential, and to identify varieties with high photosynthetic productivity. Over the years of research, the most adapted varieties of this crop were selected, their photosynthetic potential was determined, and the intensity of photosynthesis during the reproductive period of development (during the main growth phases) of spring oats in the conditions of the Lower Volga region was analyzed. On average, for 3 years of studying the collection varieties of spring oats in terms of the net productivity of photosynthesis, samples were noted: Myrtle, Athlete, Urs guara, Urs penca, p. 1. 3326 It was determined that with the growth of (FP) and (BPF), the yield of oats also increased. Since this indicator directly depends on the physiological and bioclimatic processes occurring in plants during ontogenesis. In the highest yield in 2017, it varied from 0.66 to 2.01 / ha. In 2018, the minimum yield values for all varieties were obtained from 0.51 t / ha of the Dookie 10 variety to 1.78 t / ha of the Mir variety. In the conditions of 2019, the yield variability by variety was from 0.60 t / ha to 1.94 t / ha. Thus, out of the 8 studied varieties, 5 were identified - p.1. 3326, Guara Urs, Urs foam, Athlete, Myrtle, as highly productive, and therefore the most resistant to abiotic stresses of the conditions of the Lower Volga region.