The optimization of elements of growing technology of narrow-leafed lupine (Lupines Angustifolius L.) in the Northern Forest Steppe

Aim. To assess the impact of the elements of the narrow-leaved lupine growing technology, as well as their combination, in today's weather conditions in order to determine the optimal technology model in the Northern Forest Steppe, which will ensure the stable maximum possible realization of the genetic potential of the varieties, obtaining quality products. Methods. The field (to study the interaction of the object of research with biotic and abiotic factors); the morphophysiological (for biological control of the development of productivity elements according to the stages of organogenesis); the weight (for setting the parameters of the indicators of the elements of the crop structure and determining the grain yield); the statistical (statistical processing of research results). Results. In the article analyzes the results of research conducted on gray forest soil in the conditions of the Northern Forest Steppe. The influence on the growth, vegetative and generative development of plants, the formation of productivity of such agricultural measures as fertilizers, timing, methods of sowing and sowing rates of narrow-leaved lupine (Lupinus angustifolius L.) Pelikan variety, biological preparations and plant growth stimulants are shown. With a different combination of elements in the growing technology, it is possible to obtain a grain yield of narrow-leaved lupine from 2.15 to 2.82 t/ha. The most favorable conditions for the formation of the maximum grain yield (2.82 t/ha) and the collection of raw protein (1.02 t/ha) were in the version with the application of N68Р48K66, sowing by the wide-row method (width between rows 45 cm), the rate of seed sowing 1.2 million units/ha), treated with a preparation based on a strain of nodule bacteria and a plant growth stimulator. When sowing by the usual row method with a row spacing of 15 cm and a seeding rate of 1.4 million units/ha, the productivity decreased by 4.0–8.2%. Conclusions. To maximize the potential of narrow-leaved lupine varieties, the cultivation technology must take into account the peculiarities of the impact of agrotechnical measures and hydrothermal conditions during the growing season of the crop on the process of crop formation and its quality in order to reduce risks and losses.