Formation blue lupine productivity under different options of fertilization and seed treatment

Abstract

Purpose. To increase the yield of blue lupine due to the intensification of the generative development of plants and maximum preservation of fruit elements by the phase of full ripeness by introducing the optimal dose of mineral fertilizers and foliar nutrition with a microfertilizer in chelated form at the optimum time, application of a bioinoculant and biofungicide. Methods. Field (to study the interaction of the research object with biotic and abiotic factors); morphophysiological (for biological control over the development of productivity elements at the stages of organogenesis); weight (to establish the parameters of the crop structure elements and determine the grain yield); statistical (statistical processing of research results). Results. The results of studies on the effects of different doses of mineral fertilizers, bioinoculant and biofungicide as well as foliar nutrition with microfertilizer in chelated form at different stages of organogenesis on the generative development of blue lupine plants of cultivar Peremozhets and grain yield are presented. The optimal dose of mineral fertilizers and the duration of plant foliar nutrition were determined. Conclusions. Application of the calculated dose of mineral fertilizers for the planned yield of grain of blue lupine of cultivar Peremozhets at the dose of 3.5 t/ha of mineral fertilizers (N68Р48К66), sowing with seeds treated with BTU-r bioinoculant (1 l/t) and MikoHelp biofungicide (1.0 l/t), foliar nutrition with Tropicel microfertilizer (0.3 kg/ha) at the second phase of plant organogenesis contributed to the intensification of their generative development (the number of flowers – 38.0 pcs., beans – 13.3 pcs./plant, which was 1.8 times higher than in the absolute control) as well as an increase by 39.3 % of the crop yield with a control indicator of 2.01 t/ha.