Dynamics of the formation of the leaf area of barley spring plants, depending on the influence of the seed rate and foliar dressing

Abstract

The article presents the results of studies conducted during 2015, 2016. On the experimental field of KHNAU named after V. V. Dokuchaiev concerning the influence of seeding rates and foliar fertilization on the variability of leaf area parameters and changes in the linear dimensions of second leaves of spring barley plants. It was found that the investigated variants of the seeding rate and foliar fertilizing with polymeric fertilizer «Vuksal» significantly influenced the area of the plant leaves and the linear dimensions of the second leaf of the spring barley plants. The maximal parameters of the leaf area of plants in the research phases of development provided a seeding rate of 5,0 and 5,5 million/ha. The best option for foliar top dressing of barley spring crops, which provided the formation of the largest leaf area, and the maximum linear dimensions of the second leaf was a variant of double application of the «Vuksal» – during the time of exit into the tube and earing in doses – 1,0 l/ha.