In autumn, why do the leaves on the trees turn yellow slowly?

The world is extremely magical, and trees are no exception. In spring, everything recovers, and the green eyes are full of spring. In the warm sunshine, the forest absorbs the rain and dew nutrition of the earth and grows sturdily, from small buds to towering trees. In summer, after high temperature and strong light, green leaves absorb carbon dioxide, spit out oxygen, and produce a lot of sugar through chlorophyll, which makes them grow rapidly and vigorously. After summer, in autumn, those coniferous forests will slowly lose energy and moisture in winter because of their waxy coats, so they can survive the winter smoothly, so the leaves will not change color and will continue to grow in the next spring.

On the other hand, there is no wax protection on the leaves of broad-leaved trees. In autumn, trees store all the sugar made by leaves. These sugars will lose energy and help trees survive the cold in winter. If trees don't shed leaves and stay green, they need to breathe and waste a lot of energy. Trees cannot survive the winter safely. The green shoots in spring are the essence of fate and also for growth; Leaves turn yellow in autumn to save strength to spend the cold winter and grow better next year.

Many of China's thoughts come from the movement of everything, such as "giving up". For example, "let nature take its course", "spring flowers and autumn fruits", "spring planting and autumn harvest", "spring planting and autumn harvest are ten thousand kinds" and so on, all of which are the unity of man and nature. Adapting to and protecting nature is a manifestation of wisdom. Trees and forests are alive. They understand that only by conforming to nature and the four seasons can they germinate, grow and grow. Because autumn leaves, after a year of growth, are about to age. Hair grows in spring and summer; Autumn harvest and winter storage).

When the temperature is 10C, the leaf surface. Sap began to converge, and the color of leaves naturally changed from green to red and yellow. In spring, the earth is sunny, and new leaves grow on the dead branches, first pink, red, green or yellow. Then grow to light green or dark green. With the advancement of leaves, the new branches become longer and thicker, and in midsummer, a natural cool rockery is formed. In short, no one can change the natural law that old leaves turn yellow and new leaves turn green, so there are not so many "why".