Abstract
Research objective is to determine the optimal seeding rate of varieties and hybrids of spring rape for seeds in the conditions of Northern Kazakhstan. The subject of research are varieties and hybrids of spring rape. On the experimental fields of the Esil State Grain and Feed Varietal Testing Site located in the Republic of Kazakhstan, North Kazakhstan Region, Esil District, the village of Yavlenka in 2019-2020 years, a competitive test of spring rape was carried out, represented by 5 varieties: Geros, Maykudyk, Hunter, Machaon and 3 hybrids: Caliber, Bilder, GEN0009. The main accounts and observations were carried out according to the approved methodology of the state variety testing. The carried out researches established that seed productivity of rape plants is in close interrelation from meteorological conditions of the vegetative period and studied variants of experience. After studying the seeding rates, we came to the conclusion that the greatest productivity is provided by rapeseed with a seeding rate of 2.0 million and 2.5 million. germinating seeds, and with an increase in the seeding rate, the yield decreases, from the presented samples over the years of testing, the Maykudyk variety and the Builder hybrid were selected, which distinguished themselves by a constant and full-fledged harvest, unlike other tested samples.
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