To the question of attributing Pisum sativum to maturity groups in the Krasnoyarsk forest-steppe

   Recommendations for pea maturity groups in the conditions of the Krasnoyarsk forest-steppe are given. The research was conducted in 2017–2023.

   The objects of research were pea samples.

   The number of the analyzed samples in different years varied from 178 pieces in 2018 to 74 pieces in 2022 and totaled 937 pieces during the study period. The study of the samples was carried out in the nursery of the source material (collection) research of the Krasnoyarsk NIISKh according to the methodology of VIR. Soil of the experimental plot was ordinary chernozem medium thick medium-humic heavy loamy soil. Weather conditions of the years of the study differed in terms of heat and moisture availability during the growing season, changing from dry to sufficiently humid conditions. The duration of the growing season, its dependence on HTC and the most acceptable method of assigning samples to maturity groups in the conditions of the region were determined. The duration of the growing season of the samples depended on the HTC of the June–August period. On the basis of the conducted research, taking into account the gradations according to the international classifier of the CMEA genus and the methodology of the State Variety Testing Network, as well as when calculating the HTC of the vegetation period, the scheme of assigning pea samples to maturity groups in the conditions of the Krasnoyarsk forest-steppe was proposed. In arid conditions of the growing season, the following distribution of samples is recommended for classification: ultra-early ripening less than 60 days, early-ripening 61–65 days, medium early-maturing 66–70 days, medium-maturing 71–75 days, mid-dle-late 76–80 days, late maturing 81–85 days, very late maturing more than 90 days. In humidified conditions of the growing season (sufficient and insufficient moisture): ultra-early ripening less than 70 days, early-ripening 71–75 days, medium early-maturing 76–80 days, medium-maturing 8–85 days, middle-late 86–90 days, late maturing 91–95 days, very late maturing more than 96. Excessive pre-cipitation in August allows grading dates to be shifted toward late maturing, increased temperatures toward early maturing.

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