Preliminary study of the effect of mineral nutrition on the development indicators of hazelnut in a young layering nursery

Abstract

The research was conducted in 2023–2024 at the Nursery Department of the RUE ‘Institute of Fruit Growing’. The article presents the results of a study on the biological characteristics of growth and development in hazelnut plants within a horizontal layering nursery under varying mineral nutrition regimes.
The results showed a positive effect of foliar application of mineral fertilizers on the biometric parameters of both the aerial parts and root systems of the layers in the following treatments:
Background + 0.3 % urea solution + 0.1 % potassium sulfate solution: plant height – 176.5 cm, stem diameter – 15.9 mm, rooting score – 4.6, percentage of standard layers – 93.1 %;
Background + 0.8 % urea solution + 0.1 % potassium sulfate solution: height – 164.0 cm, diameter – 12.9 mm, rooting score – 4.4, standard layers – 93.9 %;
Background + 0.5 % urea solution + 0.1 % potassium sulfate solution: height – 176.5 cm, diameter – 13.5 mm, rooting score – 4.0, standard layers – 89.7 %;
Background + Kristalon Special: height – 172.0 cm, diameter – 13.1 mm, rooting score – 4.2, standard layers – 91.6 %.