Willow is a kind of plant with ecological amplitude, which has wide adaptability to the environment. Like light, wet and cold, it is a medium-sized wet tree species. However, some species are also more drought-tolerant and salt-tolerant, and can grow in places with poor ecological conditions, and grow better in plain areas with superior site conditions. The average life span is 20 ~ 30 years, and a few varieties can reach 100 years or more. The annual growth period is long, with early germination and late defoliation, and individual tree species in the south are evergreen trees.
Extended data:
Willow is suitable for various ecological environments. Willow grows in mountains, plains, sand dunes and polar regions. Mainly distributed in temperate regions of the northern hemisphere. Salix matsudana is produced in the north, northeast and northwest plains of China. Weeping willows spread all over China and were introduced to many countries in Europe, Asia and America. Korean weeping willows, round-headed willows, long-column willows, white-skinned willows, big white willows, thin-column willows and Qilian willows are mostly produced in the northeast of China, but also distributed in Korea, Japan and the Russian Far East.
Firecracker willow originated in Europe, and then was introduced to the northeast of China. Bai Liu is produced in Xinjiang, Gansu, Qinghai and Tibet in China, and also distributed in Iran, Pakistan, northern India, Afghanistan, Russia and Europe. Salix psammophila is produced in the middle and lower reaches of the Yellow River and southern Liaoning Province, as well as Korea and Japan. Yunnan willow is produced in China, Yunnan, Guangxi, Guizhou and Sichuan. Purple willow is produced in the lower reaches of the Yangtze River in China. Salix macrophylla is produced in Sichuan Province, China. Cotton willow has been introduced in China, Beijing, Shanghai, Guangzhou and other cities.