ASSESSMENT OF GROWING SEASON DURATION AND PRODUCTIVITY OF SOYBEAN VARIETIES AND CULTIVARS UNDER THE CONDITIONS OF THE IRKUTSK REGION
2022
Katysheva, N.B. | Pomortsev, A.V. | Zorina, S.Y. | Sokolova, L.G. | Zhuravkova, A.S. | Katyshev, A.I. | Dorofeev, N.V.
As a result of the field studies of the collection of soybean varieties and variety accessions in the forest-steppe zone of the Irkutsk region it was shown that the studied varieties and samples mature and demonstrate sufficiently high productivity. Soybean varieties Barguzin and Sayana were the most late-ripening compared to other studied varieties and variety accessions (vegetation period 119-135 days). At the same time, these varieties, as well as Mageva and Chera1, had the highest coefficient of variation on the length of the growing season, i.e. in different years there was a significant difference of this indicator. Samples 0, 15, 70, 15TO, and variety Gorinskaya had a lower coefficient of variation of the length of the growing season. Samples 70 and 15TO, as well as varieties Gorinskaya, Zaryanitsa, SIBNIIK-315 were the most stable on the sign of early maturity in the forest-steppe conditions of the Irkutsk region. On average over the three years of research, higher productivity was noted in the relatively late-ripening varieties Barguzin, Sayana and Chera1. High productivity and early maturity were noted for the variety C- 33. The combination of stable productivity and early maturity is noted in varieties Gorinskaya, Zaryanitsa, SIBNIIK 315, samples 70 and 15TO. It should be noted that both heat availability and rainfall distribution in the studied years differed and undoubtedly influenced both the productivity and the duration of the growing season in the soybean genotypes studied
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