Learn about deciduous trees, starting with the characteristics of these 4 cycles

Deciduous trees include Chinese locust, weeping willow, acacia, horsetail, luan tree, green tree, french tree, green maple, ginkgo biloba, Metasequoia, ailanthus and so on. Before the arrival of ice and snow, the weather becomes cold, the soil temperature decreases, the rain decreases, the water absorption ability of the root system of the tree is greatly weakened, and the tree body cannot carry out photosynthesis, respiration and transpiration normally, and the leaves slowly fall. When the cold and drought are over, new leaves will grow. In the process, the tree quietly went through 4 cycles, what are they?

[1] Dormancy turns into the growth phase

That is, before the trees are about to germinate, from the temperature stabilization above 3 ° C, until the buds are expanded and ready to germinate. When trees move from dormancy to growth, they have certain requirements for temperature, moisture and nutrients. Features: cold resistance weakened, in case of sudden cooling, easy to occur cold damage or frost damage. Plant antifreeze is sprayed in the forestry to resist or alleviate the harm of spring cold.

[2] Growth period

From budding to deciduous leaves. This period takes up a long time of the year and goes through the process of germination, leaf spreading, flowering, fruiting, and leaf fall. The ornamental nature of garden trees is also concentrated at this stage.

[3] Growth turns into a dormant period

The natural shedding of leaves in autumn is an important sign of entering the dormant period. Before deciding leaves normally, the new shoots must go through a tissue maturation process, gradually begin to lignify, and store nutrients in the tissues for a smooth overwintering. Features: The transformation of nutrients, storage stage, improper management methods or poor environment will affect the normal transfer of dormancy.

[4] Dormancy period

The dormant period is after the trees fall and before they germinate the following year. During the dormancy period of trees, various life activities are still carried out in their bodies, such as breathing, transpiration, differentiation of buds, absorption of roots, synthesis and transformation of nutrients, etc., but they are carried out weakly and slowly. Features: strong resistance, weak and slow life activity.

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Learn about deciduous trees, starting with the characteristics of these 4 cycles