The assessement of conifers injuries after the winters of 2009–2011 in the nursery of Kaunas botanical garden of Vytautas Magnus university

Abstract

Injuries of 720 conifer decorative trees and bushes after the winters of 2009–2011 were evaluat­ ed in the nursery of Kaunas Botanical Garden. Injuries of these plants during both winters were comparable. Larger injuries were caused by: 1) longer­lasting negative temperature in winters of 2010–2011; 2) conifers were nipped off and burned by sun because the end of winter was cold and sunny. frost injuries of conifers in winters of 2009–2010 were determined by a sudden tem­ perature change in early spring from below zero to above zero. Owing to this the above­ground part of plants started the vegetation, while the roots remained frozen.