Alnus japonica Betulaceae

Alnus japonica is usually a small to medium-sized tree, but can grow into a large tree of 20 m or even higher under favourable conditions. The crown is initially relatively narrowly upright, but later widens to form a conical crown. The leaves are a glossy dark green, sometimes the young shoots are bronze coloured. The leaf margins are shallowly serrated. The male and female catkins mature in late winter. They are followed by the characteristic alder cones. These are green at first but turn dark brown as they ripen. Naturally, A. japonica often grows along stream and river banks or in swamps. The tree grows in any soil type, but the soil should be sufficiently moist or even wet. Despite being introduced to the Netherlands as early as 1866, it has never been a common species. Nevertheless, the fact that this elegant little tree is suitable for use on moist to wet soils offers plenty of opportunities for planting along banks and in wadis.
Характеристики
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Высота
10 – 15(20) m
Ширина
8-12m
Крона
broad conical, half-open crown
Кора и ветви
branches gray to reddish brown: bark grey, grooved, later peeling off in irregular plates
Лист
ovate to broad lanceolate, 6-12 cm long, glossy dark green
Цветы
catkins, ♂ light green-yellow, ♀ purplish red, February-March
Плоды
broad ovoid strobiles, 1,5-2cm
Колючки/шипы
None
Ядовитость
неядовитый, обычно
Вид почвы
clayed soil, loamy soil, sandy soil
Влажность почвы
устойчив к влажным почвам, устойчив к коротким наводнениям, устойчив к длительным наводнениям
Мощение
неустойчив к мощению
Зона зимостойкости
4 (-34,4 до -28,9 °C)
Устойчивость к ветру
good
Прочие виды устойчивости
устойчив к морозам, зона 1 - 6, cустойчив к ветру, устойчив к соли для улиц
Применение
промышленные зоны
Форма
штамбовое дерево
штамбовое дерево глинистые почвы суглинок торфяные почвы песчаные почвы неустойчив к мощению устойчив к соли для улиц устойчив к морозам (зона 1 - 6) устойчив к влажным почвам устойчив к длительным наводнениям устойчив к коротким наводнениям устойчив к ветру широкая конусообразная форма 1 высота: более 12 метров крона средней плотности зеленый фиолетовый/синий желтый среднерастущий неядовитый (обычно)
Часто задаваемые вопросы
Alnus japonica

Alnus japonica can eventually reach a height of 10 – 15(20) m, depending on the site and climate conditions.

Alnus japonica is среднерастущий and can eventually reach a height of 10 – 15(20) m, depending on the site and climate conditions.

The right time to plant Alnus japonica is during the dormancy period. In Western Europe, Alnus japonica with root balls can generally be planted from mid-November to late April, although this depends strongly on the climatic conditions and the species of tree.

Alnus japonica blooms in февраль, март.
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