Introduction to poplar:
Populus alba, the general name of poplar in Salicaceae, has smooth gray-green bark and natural branches; The green leaves are dense and turn bright yellow; It is dioecious, and the first leaf opens in spring. Bark is usually gray and smooth, and only the base of old trees is rough. Buds villous or smooth. Leaves villous, at least under long branches and leaves; Short branches and leaves are fluffy or smooth.
Petiole lateral flat or nearly cylindrical. Bracts split into strips, with long hairs on the edges, and stigma 2-4-lobed; Stamens 5-20, anthers not apiculate. Capsule oblong, usually 2-valved. Poplar, native to the northern hemisphere, is famous for its leaves swaying in the breeze and straight trunk. Because of the fast tillering, more trees grow into forests and rare individual trees, which is very beneficial to the natural landscape.
Morphological characteristics:
Deciduous tree, about 30 meters high, DBH about 65438 0 meters, straight trunk, gray-green to gray-white bark, diamond-shaped lenticels, dark gray at the base of the old tree, longitudinal crack. The young branches are hairy and then fall off. The leaf buds are ovate, and the long branches and leaves are broadly ovate or triangular-ovate, with a length of 10- 15 cm, a short tip tapering, a heart-shaped or truncated base, deep or wavy teeth, densely villous below, gradually falling off, and a flat upper petiole.
3-7 cm long, with 2-4 glands at the top; Short branches and leaves are ovate or triangular-ovate, the apex is acuminate, the lower part is hairless, the teeth are deeply wavy, the petiole is flat, slightly shorter than the leaves. The flower buds are ovoid or subglobose, the male inflorescence is 10- 14 cm long, the bracts are densely hairy, and the stamens are 6-12; The female flower is oval, and the inflorescence is14cm long. Fruit conical or oblong, 2-lobed. Flowering in March-April.
Growing environment:
Strong positive tree species. I like a cool and humid climate. In places where the temperature difference between day and night is relatively large in early spring, bark often freezes and cracks, commonly known as "broken belly disease". In warm, hot and rainy climate conditions, diseases and pests are prone to occur and poor growth. The requirements for soil are not strict, and it grows rapidly on deep, fertile and moist loam or sandy loam. In arid and barren saline-alkali land and low-lying waterlogged desert land, the growth is poor and the diseases and insect pests are serious.
It is easy to form a "small old tree". Slightly saline-alkali-tolerant, big trees are water-resistant and moisture-resistant, with deep roots, developed roots, strong rhizosphere germination, rapid growth, smoke and dust resistance and pollution resistance. Life span is the longest tree species in Populus euphratica, with a life span of 200 years.