Influence of foliar application of preparations of different spectrum of action on the commercial quality of apple-tree fruits species of the early ripening period

Abstract

In 2018–2020 in the department of fruit-growing technology of RUE “Institute of Fruit-growing”, the effect of foliar application of preparations of different spectrum of action (growth regulator “Epinˮ, organomineral fertilizer “Megafolˮ and complex fertilizer “KompleMet COˮ) on the yield and commercial quality of apple-tree fruits of early ripening period species Mechta and Kovalenkovskoye on a semi-dwarf rootstock 54-118.

As a result of the investigations, it was found that the use of complex preparations of various effects on average over three years of research did not lead to an increase in yield in both studied apple-tree species, however their using influenced the commercial quality of the resulting crop. The output of Mechta species apple-tree fruits of the first and second commercial species with foliar application of the growth regulator “Epinˮ was 97.0 %, with the application of organic mineral fertilizer “Megafolˮ – 97.5 %, with the application of complex fertilizer “KompleMet COˮ – 95.8 %, which is 2.1–3.8 % more than in the control.

The output of Kovalenkovskoye species apple-tree fruits of the first and second commercial species with foliar application of the “KompleMet СOˮ complex fertilizer was 95.3 %, which is 1.6 % more than in the control.