Pine trees are very adaptable to the land environment. They can tolerate the low temperature of -60℃ or the high temperature of 50℃, can grow in bare mineral soil, sandy soil, volcanic ash, calcareous soil, limestone soil and various soils from calcareous soil to red soil, and are drought-tolerant, barren and sunny, so they are famous pioneer trees.
Extended data:
The most obvious feature of pine and cypress is that the leaves are needle-shaped, usually 2 or 3 needles in a bundle. For example, the leaves of Pinus tabulaeformis, Pinus massoniana and Pinus taiwanensis are in bundles of 2 needles, the leaves of Pinus bungeana are in bundles of 3 needles, and the leaves of Pinus koraiensis, Pinus armandii and Pinus pentaphylla are in bundles of 5 needles.
Although the leaves of pine and cypress are still green in winter, their colors are much worse than those in spring, summer and autumn. This is because the winter temperature is low, the production of chlorophyll in leaves is limited, and anthocyanins are relatively increased, so the leaves are a little red. This color change will weaken photosynthesis in leaves and slow down the physiological activities of trees. This is very beneficial to ensure the safe overwintering of pine and cypress trees.