BIOMETRIC ANALYSIS GROWTH AND CLASSIFICATION OF NUTRITION MODES OF LEGUM-RHIZOBIAL SYMBIOSYSTEM OF THE SOYBEAN UNDER CONTROLLED AGGREGATOPONICS

Abstract

We have studied the effect of organomineral fertilizers on the growth and development of soybean plants grown in closed artificial soil and agregatoponics conditions, in a phytotron. The technological scheme of cultivation traditionally used seed inoculation with bacterial strains of the genus Bradyrhizobium, as well as the introduction of a starting dose of N16P20K27 into the substrate. The novelty of the proposed fertilizing agricultural technology is the additional enrichment of the nutrient substrate with a new type of organic fertilizer obtained from the excrement of black soldier fly larvae (zoocompost). The experiment included 36 options. The vegetation period was 20 days. Inoculation and NPK addition were the key drivers of plant growth, mineral fertilizer was the best catalyst for increasing plant biomass (p <0.001), bacteria - for height (p <0.001). The type of selection of zoocompost was also important (p=0.006) as an additional trigger for accumulation of essential elements in biomass. Water extract was more effective than alkaline extract when combined with NPK. Without NPK, on the contrary, alkaline extract of zoocompost showed the best result. The maximum values of biomass and plant height were recorded with the combined use of inoculation, mineral fertilizer and zoocompost with sediment (without centrifugation) obtained during alkaline extraction, regardless of the sterilization process (options 22 and 26). Option 22 was characterized by the highest total accumulation of biogenic elements. At the same time, the neural network analysis method used by the authors, based on the assessment of the ratio of mass-accumulative and biochemical processes, showed a different result. The best level of internal metabolism associated with the action of bacteria and/or taking into account the NPK factor was found here for the group of variants 15-16/33-34, using an aqueous extract of zoocompost (sterilized/without centrifugation). The results of the study demonstrate the prospects of growing soybeans in these conditions for the development of breeding programs and evaluation of the nutritional regime of organic sprouts when creating new stress-resistant varieties.