NaCl and twig dieback along highways and cold hardiness of highway versus garden twigs

摘要: The timing and amount of stem damage bud kill, along with the Cl content twigs, were observed over one or two winters in Fraxinus pennsylvanica Marsh, Cornus stolonifera Michx, Malus sp. cv. Hopa, Salix pentandra L., Syringa vulgaris L. growing Minnesota highways. Depending on species year, occurred between January May.Cold hardiness was compared for highway- garden-grown Marsh. Hardiness assessed as percentage xylem cambial browning kill after exposure to test temperatures −45 +4 °C. In November, same, but from mid-December into March, highway twigs showed more than garden at same temperatures. differences coincided time twig Cl.