On the state of plant carbon source and carbon sink under light conditions
Plants in the world, in the light environment, study whether it is a carbon source or a carbon sink, this is the weight of academic inquiry.

When the sun is full of light, plants perform photosynthesis, and their chlorophyll traps light. With the power of light, carbon dioxide and water are converted into carbohydrates, and oxygen is released. In this process, carbon dioxide enters the plant and is fixed in organic compounds, which is a sign of carbon sink. Cover plants like diligent craftsmen, extract carbon from the atmosphere, cast their own bodies, and proliferate matter. Looking at the forests, the vast forests and seas are under the light, absorbing countless carbon over the years, forming a natural carbon pool, slowing down the greenhouse effect, and making great contributions.

However, the change of light also leads to differences in plant physiology. If the light is weak, or the environment is special, plant respiration is vigorous. When breathing, plants consume their own organic matter and release carbon dioxide. At this time, plants move from carbon sink to carbon source. Such as in the cold season, when there is insufficient light, leaves wither and fall, plant respiration is strong, and carbon returns to the atmosphere.

Furthermore, different parts of plants and different growth stages also change the nature of carbon source and carbon sink under light. Young plants are vigorous, photosynthetic is strong, and most of them are carbon sinks; old plants are gradually decaying physiologically, or become carbon sources at some times.

It is important that under light conditions, the state of plant carbon source and carbon sink is non-constant, and changes with light intensity, environmental change, and growth period. Knowing this, it is of great benefit to ecological conservation and climate analysis, which can help our generation make good use of plants, protect the ecological balance, and cope with climate changes.