Critical periods and parameters of growth of beet at drop irrigation in Southern Steppe

Abstract

The purpose. To determine critical periods of growth of beet at drop irrigation, to determine the degree of variability of productivity at change of parameters of growth in critical phases using B. Gomperts function. Methods. Field, statistical. Results. Speed of increase in crude mass of beet without fertilization decreases for 50,6%, duration of critical period of growth increases for 0,9 day, productivity of root crops decreases for 46,9% in comparison with variant N90P60K135. Direct correlation link (R=0,99) between variability of parameters of growth in critical points and productivity of root crops is revealed. Conclusions. Modelling of growth of beet using B. Gomperts function and its analysis allow determining parameters of growth in critical points at different factors of influence, and also determining their optimum ratio.