1、 Viewing time

Zhuangziling of Shexian county is located in Shexian County, Hebei Province. After autumn, the mountains are full of red and yellow leaves, which are very dazzling. Usually, the time to see the red leaves starts from the first and middle of October, and the viewing period is about one month, which can last until the middle and late November. The redness of red leaves is mainly affected by the climate, so the viewing period is different every year, either in advance or delayed, which is a normal phenomenon

2、 Why red leaves turn red

The leaves are not only green, but also anthocyanins, lutein and carotene, but the content of the latter three is low, so most people can't see it. After entering autumn, the temperature will slowly drop, and the leaf green pigment in the leaves will be decomposed to the roots and trunk. When the chlorophyll content of leaves is low, the remaining pigment content is high, so it will change color. Moreover, anthocyanins are synthesized at low air temperature in autumn. When anthocyanins meet with acidic cell fluid, they will turn red

In addition, sunlight will also affect the yellowing of leaves. Under normal circumstances, the location of the top of the mountain is better, so if you grow in a place with good sunshine, the leaves will turn red in advance. The sunlight at the foot of the mountain will be worse, so the discoloration will be slightly delayed