Dynamics of the botanical composition of sown hayfields depending on fertilization

Abstract

Aim. To establish the effect of fertilization and foliar feeding with growth regulator organic balance on the formation of fodder productivity of legume-cereal grass stands. Methods. The study was carried out in the conditions of the Western Forest-Steppe on dark gray podzolicglayed slightly washed soil of the Institute of Agriculture of the Carpathian Region of NAAS. The technology of growing perennial grasses in the experiment, in addition to the factors that we studied, is generally accepted and recommended for the research area. In the experiment, varieties of perennial legume and cereal grasses included in the State Register and bred by breeders of our Institute were sown. Results. The obtained data from the research carried out in a temporary field experiment, established in 2017, on the study of influence of fertilization and foliar feeding with growth regulator organic balance on the formation of fodder productivity of legume-cereal grass stands indicate that the introduction of mineral fertilizers in the spring and foliar feeding of vegetating grasses with growth regulator organic balance we can regulate the botanical composition of grass stand in favors of leguminous grasses and thereby to affect yield and quality of the legume-cereal grass mixtures. Conclusion. On average of three years of study in the first, second and third mowing, the most favorable conditions for the growth and development of legumes were on the plots fertilized with P60K90 (50.4, 45.7 and 34.4%) and on the control (38.7, 40.7 and 31.4%). Additional nitrogen (N60) fertilization of grasses reduced their share to 14.4, 19.8 and 20.8%.