What does the depth of tree rings represent? .

Dark tree rings represent autumn and light tree rings represent spring.

The mild climate and abundant rainfall in spring are beneficial to the growth of trees. This is because the cambium cells divide vigorously, the newborn cells are large and obvious, and the ducts are large and many. Therefore, the wood looks light in color and soft in texture.

After summer, as the temperature rises. Rainfall decreases, especially in autumn, the weather is getting colder and colder, the rainfall is less, the cambium activity is weakened, and the shape of splinter cell becomes smaller. In addition, the cell wall is thick and there are few ducts, so the wood looks dense and hard, and the color is dark.

Extended data:

Influencing factors of digital ring width

1. Genus of tree species: for example, poplar and paulownia have wide rings, while boxwood and dogwood have narrow rings.

2. Tree age: The annual rings formed by trees are wider and wider at the initial stage of growth, but gradually narrow with the growth of tree age.

3. Living environment conditions: For example, the average annual ring width of the shrub Betula platyphylla in Greenland at 73 degrees north latitude is less than 0.05 mm, but in a botanical garden in Central Europe, the average annual ring width of the same kind of small Betula platyphylla is 1.6 mm.

Application of number tree ring

1, calculate the age of the tree.

Tree rings represent the periodic changes in the growth environment of trees, usually followed by an annual change cycle, so tree rings also represent the growth in a year. According to the tree rings, we can infer the age of trees, which can be used to examine the age of forests.

2. Understand the climatic conditions for one year.

The width of tree rings can help us understand the experience of trees and the relationship between trees and the local environment and climate at that time. Under favorable climatic conditions, trees grow well, xylem increases more, annual rings are wider, and vice versa.

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