Use of zoohumus extracts in soybean cultivation under regulated agroecosystem conditions

Abstract

A model experiment was conducted in the laboratory conditions of the climate chamber to study the effect of liquid extract of black soldier fly zoohumus prepared in different ways on the growth rates and germination of seeds of the early ripening soybean variety EN Argenta. The zoohumus suspension was used in all variants at a dose of 0.2% (2000 ppm). As an additional background, a complex fertilizer containing the necessary plant nutrients in the form of various mineral salts was added. Analysis of the experimental data showed that the highest percentage of plant germination was recorded in the variant with the introduced aqueous suspension of zoohumus without centrifugation and without sterilization, and amounted to 94%. Against the background of pure organic matter, an increase in shoot biomass by an average of 22% was recorded. However, here the variant with sterilization, but without centrifugation of the zoohumus suspension, stood out. Against the background of the organomineral environment, the weight and height of the plants were higher, but stagnation in growth was noted, probably due to oversaturation in the feeding regime and the formation of chelate complexes of prolonged absorption. Thus, an aqueous suspension of zoohumus obtained by sterilization without additional centrifugation is the best way to prepare samples of raw materials for further use in sterile experiments. Centrifugation reduces the amount of enzymes and nutritional compounds, which negatively affects the quality of the suspension, and additional sterilization releases an additional amount of low-molecular compounds into the environment, which can feed microorganisms.