• • • Late seeding of wheat in Trans-Urals — relevance and facts
Unstable climate of Trans-Urals makes late seeding (in June) of practical use. It is used to accelerate evaluation of variety resistance to abiotic stress and rust pathogens. For 13 years average productivity of early and optimal seedings made up 2.32 and 2.25 t ha-1, late sowing — significantly less — 1.4 t ha-1. Early- and mid-season varieties performed the best when sowing late. They formed good grain prior to frost that had thousand-kernel weight of 30 g, grain unit — up to 750 g/L and gluten content — over 32%. Under rust epidemic of 2017 productivity of standard varieties “Omskaya 36”, “Tertsiya”, “Omskaya 35” amounted to 0.56, 0.23 and 0.64 t ha-1, thousand-kernel weight — 17.7–20 g, grain unit — 514–555 g/L. Same characteristics of the best varieties made up 1.64–2.5 t ha-1, 27.1–35.8 g and 647–740 g/L, respectively. Variety trial selected 13 genotypes of various maturation rate that provided stable yield under high rust contamination. They exceeded the standard by 0.6–1.55 t ha-1 on the average. New varieties Tr-182, Tr-400, DV-30-14 and DV-38 yielded good and showed high resistance to leaf-stem diseases. Ultra-short-season variety “Fora” was effective when seeding late.
Source: http://kormoproizvodstvo.ru/en/11-2018-2/, p. 27
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