Photosynthetic activity of narrow-leaved lupine plants with various options for fertilization and seed treatment

Abstract

Target. Intensification of photosynthetic activity of narrow-leaved lupine plants in order to increase the level of crop grain yield by creating optimal conditions for their growth and development due to the combination in the technological process of the dose of mineral fertilizers calculated for the planned yield and foliar top dressing with fertilizers during critical periods of crop development, as well as seed treatment before sowing by inoculant with a fungicide. Ways. Field (to study the interaction of the research object with biotic and abiotic factors); morphophysiological (for biological control over the development of performance elements at the stages of organogenesis); weight (to establish the parameters of indicators of the elements of the structure of the crop and determine the yield of grain); statistical (statistical processing of research results). Results. The basis for increasing the yield of narrow-leaved lupine is the intensification of photosynthetic processes in plant organims. Strengthening these processes is impossible without optimizing the nutrition system at each of the corresponding stages of the life cycle of a plant organism. One of the ways to solve the problem of optimizing the balance of nutrients in agrocenosis is a complex combination in a single technological cycle of such elements as the main fertilizer, foliar fertilizing with microelements in an accessible form and sowing with seeds treated with symbiotic nitrogen-fixing microorganisms in combination with a biofungicide. The results of studies of the effect of various doses of mineral fertilizers, a bioinoculant and a disinfectant, as well as foliar fertilization with a fertilizer in a chelate form at different stages of organogenesis on the photosynthetic activity of narrow-leaved lupine cultivar Peremozhets plants are presented. The optimal dose of mineral fertilizers and the timing of foliar feeding of plants, as well as the need for pre-sowing treatment of seeds with an inoculant and a biofungicide, were determined. Conclusions. Such a complex of agrotechnical measures (applying a dose of mineral fertilizers (N68P48K66) calculated for the planned grain yield of narrow-leaved lupine variety Peremozhets 3.5 t/ha, sowing with seeds treated with a bioinoculant (1 l/t) in combination with biofungicide 3 kg/ha) on II stage of organogenesis of lupine plants) contributed to the intensification of photosynthetic activity of plants (the maximum leaf surface area (659.9 cm2/growth) was formed at the VIII stage of organogenesis, most of the dry matter (13.1 g/growth) accumulated at the X stage of organogenesis, which exceeded the absolute control values ​​by 138.8% and 61.7%, respectively.