Formation of white lupine productivity depending on the fertilization and pre-sowing seed treatment

Abstract

Purpose. Intensification of generative development of white lupine plants in order to increase the rate of crop yield using the inoculant, fungicide and plant growth stimulator of biological origin and foliar nutrition with microfertilizer in the optimum time. Methods. Field (to study the interaction of the object of research with biotic and abiotic factors); morphophysiological (for biological control of the development of productivity elements in the stages of organogenesis); weighing (to set parameters of indices of the yield structure elements and determine grain yield); statistical (statistical processing of research results).Results. The article presents the results of research on the influence of bio-agents, in particular inoculant, fungicide and plant growth stimulator as well as foliar nutrition with microfertilizer in chelate form in various stages of organogenesis on the generative development of white lupine plants of «Chabanskyi» variety with an intermediate type of stem branching, formation of the elements of productivity and plant productivity. The optimal time period for foliar nutrition of plants is identified. It is established that the formation of the maximum mass of grain by plants in the experiment (13 g) requires the technology of white lupine growing that involves application of N30P45K90, planting of seeds treated with bio-inoculant BTU-r and bio-fungicide MikoHelp at a wide row spacing and seeding rate of 1.0 million seeds per hectare, spraying of plants in the branching phase with plant growth stimulator ‘Ratchet’ and foliar nutrition with micro-fertilizer Trazeks in the second stage of organogenesis.