THE INFLUENCE OF AGROMETEOROLOGICAL CONDITIONS OF THE MIDDLE VOLGA REGION ON THE FORMATION OF FLAX OIL PRODUCTIVITY
The research objective was to study the influence of agroecological conditions of cultivation on the productivity and oil content of oil flax varieties of the Kostanay Scientific Research Institute of Agriculture. The place of the research was Povolzhsk Research Institute of Selection and Seed Production named after P.N. Konstantinov - the branch of FSBI of science of the Samara Federal Research Center of the Russian Academy of Sciences (Samara Region, Ust-Kinelsk). The research was carried out in accordance with the methodology of the state variety testing of agricultural crops and methodological instructions of the VIR for the study of flax collection. The objects of the research were 7 varieties of oil flax: Kinelsky 2000 (originator of the FSBRI ‘Povolzhsk RIA’), adopted as the standard and 6 varieties of the selection by Kostanay Research Institute of Agriculture (Republic of Kazakhstan) - Kostanaysky yantar, Kazar, Kostanaysky 11, Ilyich, Slavyachil and Istok. During the research the relationship of the main economically valuable traits with productivity and the response of varieties to agrometeorological conditions in the region was analysed. All varieties belong to the group of mid-season (94-96 days). The maximum seed yield was ensured by the varieties Kustanaysky yantar - 2.17 t / hectare and Kazar - 2.14 t / hectare. The highest oil content in the seeds was noted for Slavyachil variety - 40.05 %. By collecting oil per hectare, the varieties Kustanaysky yantar and Kazar stood out - 0.82 t / hectare. On average, over the years of study, the largest seeds were formed by Ilyich variety - 7.31 g. Close dependence of soil moisture supply on the plant height and the mass of 1000 seeds was established; the indicator of the sum of active temperatures had close correlation with the length of the growing season in varieties Kinelsky 2000 and Istok, with the yield of seeds and the collection of oil per hectare. All the varieties show close correlation between the plant’s height and 1000 seeds weight, as well as the yield and oil harvest per hectare.