Influence of Mineral Fertilizers on the Dynamics of Biomass Aaccumulation and Plant Growth of Winter Rye

Abstract

The dynamics of biomass and height of Secale cereale L. plants was studied in a long-term stationary field experiment on sod-podzolic light loamy soil. Systematic application of mineral fertilizers (option 2 – N65P50K50, option 3 – N100P75K75) had a significant impact on the height and biomass of plants at all tested stages of vegetation (eight time points within 50 days). To describe the dynamics of biomass and height of Secale cereale L. plants, sigmoid (logistic) and linear models are well suited, which made it possible to calculate such parameters as maximum biomass and height (M2, g : H2, cm), maximum speed (Vmax, g ⋅ day–1 (cm ⋅ day–1)) and average speed (b, g ⋅ day–1 (cm ⋅ day–1)). The Vmax values of the growth of raw plant biomass in variants 2 and 3 exceeded this indicator for the control variant by 1.7–2.0 times; Vmax of plant height growth varied within 4.2–4.6 cm ⋅ day–1, did not depend on the application of mineral fertilizers. The application of mineral fertilizers led to an increase in the average growth rate of the biomass of plants Secale cereale L. (b, g ⋅ day–1), in relation to the control, by more than 2 times.