EVALUATION OF BIOLOGICAL EFFICIENCY OF HUMIC GROWTH STIMULATOR IN SOYBEAN CULTIVATION
DOI 10.12737/2073-0462-2025-1-31-33 УДК 635.65:631.8
Keywords:
soybean (Glycine), stimulant, irrigation, water consumption coefficient, yield.Abstract
The studies were conducted to determine the effectiveness of using the multifunctional humic growth stimulator Lignohumate of AM potassium brand with an increased content of fulvic acids on soybean productivity under irrigated conditions. The work was carried out in 2021-2023 on an experimental irrigated site in the north of Astrakhan region. The soil of the experimental site is light chestnut, solonetzic. The humus content in the arable layer was 0.9%, mobile phosphorus and potassium (according to Machigin) - 24.3 and 441.5 mg/kg of soil, respectively, the particle size distribution is medium loamy. The field experiment design included the following variants: no treatment (control); lignohumate of AM potassium brand at a dose of 30, 50 and 70 g/ha. Over the years of study, the average daily air temperature varied from +16.5 to +26.9 ºС. July and August were quite hot, with maximum temperatures ranging from +34.1 to +38.7 ºС. Relative air humidity was 41.6 to 47.7%. Average precipitation during the growing season varied from 12.0 to 22.7 mm. Soil temperature at a depth of 0.05 to 0.15 m ranged from 24.3 to 26.8 ºС. The maximum number of grains per plant (138.3 pcs.), the weight of grains per plant (22.3 g) and the weight of 1000 seeds (212.3 g) were noted in the variant with the preparation dose of 50 g/ha. Based on the results of a three-year study, variants with the preparation doses of 50 and 70 g/ha with a yield of 4.5 t/ha were identified by productivity.
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