VARIETIES OF NARROW-LEAFED LUPINE (<i>LUPINUS ANGUSTIFOLIUS</i> L.) FOR FORAGE PURPOSES IN THE KIROV REGION

Abstract

This article studies narrow-leafed lupine (Lupinus angustifolius L.) varieties in the Kirov region forage purposes. The research aims to evaluate the productivity of green mass and the quality of lupine harvest. The material for the study included narrow-leafed lupine varieties for forage purposes: Siderat 46, Akkord, Fedorovskiy, and Metsenat. The research was conducted at the Agrotechnopark of the Vyatka State Agrotechnological University in 2021-2022. The site soils are medium loamy sod-podzolic soils with weak acidity, moderately supplied with mobile phosphorus and exchangeable potassium. As a control, pea crops of the Ukat and Ryabchik varieties were used. The research years varied in terms of meteorological conditions. A significant increase in yield was observed for all studied narrow-leafed lupine types, ranging from 47%.The Akkord variety showed the highest gain of green mass (810.5 c/ha). The lowest yield was obtained for the Siderat 46 variety (623.5 c/ha), but even this value exceeded the indicators of the Ukat variety by 47% and the Ryabchik variety by 55.8%. In samples at natural moisture content, all presented narrow-leafed lupine types contained more nitrogen in the green mass than field pea and vetch. The maximum nitrogen content was observed in the Metsenat (2.63%) and Fedorovskiy (2.60%) varieties. The high nitrogen content indicates the lupine's ability to fix nitrogen efficiently in the conditions of the Kirov region. All studied narrow-leafed lupine varieties exhibited an increased content of alkaloids in the green mass, ranging from 0.358 to 0.482%. This indicates their sufficient resistance to adverse conditions, diseases, and pests. The studied narrow-leafed lupine varieties meet the requirements for forage crops and can produce a high yield of green mass with adequate nitrogen content in the Kirov region.