The leaves of the four-season branch have turned yellow, exploring the secrets of plant defoliation.

Why Leaves Fall and the Significance of Leaf Drop: How to Deal with Falling LeavesLeaves falling is a common phenomenon in nature. When autumn arrives, the leaves of many trees gradually turn yellow and eventually fall off. This phenomenon not only beautifies our environment but also contains rich biological and ecological knowledge. This article will guide you through the reasons why the leaves of seasonal branches turn yellow and the scientific secrets behind this phenomenon.Reasons for Leaf Drop1. Climatic FactorsWith the change of seasons, the temperature gradually decreases, and the duration of sunlight shortens. This climatic condition weakens the photosynthesis within the plants, which cannot meet the light energy required for plant growth. To reduce energy consumption, plants will gradually close their stomata, lower water evaporation, and enter a dormant state. During this process, chlorophyll is gradually degraded, and the leaves turn yellow.2. Weakened PhotosynthesisChlorophyll is an essential pigment for plants to perform photosynthesis. It absorbs light energy and converts it into chemical energy. When photosynthesis weakens, plants cannot fully utilize light energy, leading to a decrease in chlorophyll content and the leaves turning yellow.3. Accumulation of AbscissinAbscissin is a plant hormone that promotes leaf senescence and abscission. When plants enter a dormant state, the accumulation of abscissin in the leaves increases, causing the leaves to turn yellow and eventually fall off.Significance of Leaf Drop1. Leaf Drop Helps Plant GrowthLeaves dropping can reduce the consumption of water and nutrients within the plant, allowing the plant to better adapt to the cold environment in winter. Leaves also provide organic matter for the soil, promoting an improvement in soil fertility.2. Leaf Drop Helps Maintain Ecosystem BalanceLeaves provide abundant nutrients for soil microbes, which is beneficial for their growth and reproduction. Leaves also promote the water cycle in the soil, maintaining ecosystem balance.3. Leaf Drop Has Aesthetic ValueLeaves dropping bring beautiful autumn scenery, enriching our lives. Leaves also have high artistic value, with many artists and photographers creating excellent works with this as their subject.How to Deal with Leaf Drop1. Proper Plant MaintenanceDuring plant growth, it is important to water and fertilize them in a timely manner to ensure healthy growth. For plants that are prone to leaf drop, it is advisable to increase sunlight exposure to promote photosynthesis.2. Collecting LeavesLeaves can be used to make flower fertilizer, compost, etc., to improve soil fertility. Leaves can also be used for decoration to beautify the environment.3. Tree PruningFor trees with severe leaf drop, it is appropriate to prune them, removing diseased and weak branches and dense branches to improve the ventilation and light penetration of the trees, thereby reducing the leaf drop phenomenon.The phenomenon of the leaves of seasonal branches turning yellow not only beautifies our environment but also contains rich biological and ecological knowledge. Understanding the reasons and significance of leaf drop helps us better protect plants and maintain ecological balance. We can also deal with the leaf drop phenomenon by collecting leaves and pruning trees, bringing more beauty to our lives.