ASSESSMENT OF THE EFFECT OF BIOFERTILIZERS ON THE PRODUCTIVITY OF SPRING SOFT WHEAT

Abstract

The article presents the results of field and laboratory studies to assess the effectiveness of the influence of biostimulants and fertilizers on the growth, yield, and grain quality of spring wheat in the conditions of Northern Kazakhstan. The field experiments were randomized using three types of foliar treatment, consisting of biosulfur organic fertilizer and amino acid biostimulants with a recommended application rate of 1 l / ha^-1, in addition to 50 kg and 25 kg of starter NP mineral fertilizer. Research options are designated as B1 (50 kg of NP + biological treatment), B2 (25 kg of NP + biological treatment), B3 (0 kg of NP + biological treatment) and a control plot (without application) treated with mineral fertilizer (100 kg of ammophos). All biotreatment plots showed significant improvements in growth parameters including plant height, root length, plant density and productive tillers. Among the treatments, the 50 kg NP + Biotreatment treatment showed the most consistent improvements in biological and actual yields, 28.2 t ha-1 and 24.3 t ha-1, respectively. Grain quality analysis revealed a significant increase in protein content across all experimental plots. The 50 and 25 kg NP biotreatments showed higher NDVI values at all growth stages, indicating better chlorophyll levels and plant health. Although the results are promising, future studies over multiple seasons are recommended to further validate the long-term benefits under different field conditions.