Willow is a broad ecological amplitude plant. It has a wide range of adaptability to the environment. It is light, wet and cold. It is a kind of medium and wet species. But some species are also more drought and salinity, can grow in harsh ecological conditions, site conditions in the superior plain fertile fields, better growth. The average life span is 20~30 years, and a few can reach more than 100 years. In one year, a long long period of birth, early germination, late deciduous leaves, and a few species of evergreen trees in the south.
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