Seeds sowing quality depending on sowing time and sowing rates in the northern forest-steppe of the Tyumen region

In 2018-2020 research was carried out on the experimental field of the Northern Trans-Ural State Agricultural University to study the effect of sowing dates and seeding rates on the growth, development of plants, yield and seed yield of wheat varieties Novosibirskaya 31 and Iren'. The purpose of research is to study the effect of sowing dates and seeding rates on the growth and development of plants of wheat varieties in the northern forest-steppe of the Tyumen Region. As a result of research, it was found that wheat varieties in the experimental variants formed a developed leaf surface - 27.7-36.8 thousand and 26.0-34.1 thousand m2/ha, plant height 80-90 cm. cultivar Novosibirskaya 31 in the variants of the experiment was 85-97 days, in cultivar Iren’ - 83-96 days. Cleaning took place in favorable weather conditions. On average over three years, the maximum yield for the Novosibirskaya 31 variety was obtained at the second sowing term in the variant with sowing 6.7 million germinating grains per hectare and amounted to 4.32 t/ha, for the Iren variety - 3.58 t/ha at the second term sowing with a seeding rate of 6.7 million germinating grains per hectare. The maximum yield of seeds from the total yield for the Novosibirskaya 31 variety was obtained at the first sowing term with a seeding rate of 6.2 million germinating grains per hectare and amounted to 83.4 %, for the Iren variety - at the first sowing term with a seeding rate of 6.7 million germinating grains per hectare - 81.7 %.