GEOGRAPHY

The change of carbon sequestration rate and carbon sequestration capacity of fir plantation forest with forest age were revealed


Li Xu, a doctoral student at the Center for Ecology and Environmental Sciences, South China Botanical Garden, Chinese Academy of Sciences, and Luis Carlos Ramos Aguila, a postdoctoral fellow, under the guidance of researcher Liu Juxiu, revealed the change of carbon sequestration rate and carbon storage of fir plantations with forest age. Recently, the relevant results were published in Holistic Environmental Science.

Global warming is already a fact, and reducing fossil fuel burning and increasing the carbon sequestration capacity of ecosystems is essential to mitigate climate change. Under the background of China’s “dual carbon” goal, artificial afforestation to increase terrestrial biomass and soil carbon sink is an effective way to slow down the current global warming trend.

Fir is an important native coniferous tree species in the subtropical region of southern China. In recent years, some studies have evaluated the carbon sequestration potential of China’s forests through simulation models and statistical methods, however, it is necessary to accurately assess the carbon sequestration potential and carbon sequestration capacity of carbon sequestration capacity and carbon sequestration capacity in order to accurately assess carbon sequestration potential and carbon sequestration capacity of fir forests of different forest ages, which is helpful to revise the model and serve the realization of China’s “dual carbon” goal.

Conceptual map of carbon storage in different forest age fir forest ecosystems. Photo courtesy of the research team

Relying on Lechang Forest Farm in Guangdong Province, the researchers measured the carbon storage of arbor, understory vegetation, litter and soil layers of 5, 10, 15, 20, 30 and 60 years old in fir plantations, and found that the carbon storage of arbor, understory vegetation, litter, soil layer and fir forest ecosystem increased steadily with forest age.

The total carbon pool of fir plantation ecosystems from 5 to 60 years old increased from 129.11 to 348.43 mg ha-1. The carbon sequestration rate of fir plantations increased overall between the first two forest zones (5-10 and 10-15 forest age), peaked at 611.74 g m-2 year-1 in the 15-20 forest age range, and decreased in the 20-30 and 30-60 forest age ranges. Studies have shown that carbon sequestration rates are related to the age of trees, with forests in the middle age stage (15-20 years) of fir forests having the highest carbon sequestration rates.

Liu Juxiu, a researcher at the South China Botanical Garden of the Chinese Academy of Sciences and corresponding author, said that the study revealed the change of carbon sequestration rate and carbon sequestration capacity of fir plantations with forest age, and the relevant information will help the national climate change mitigation action and afforestation plan.

The above research was supported by the National Natural Science Foundation of China and the Guangdong Provincial Key Areas Research and Development Program. (Source: China Science News Zhu Hanbin)

Related paper information:https://doi.org/10.1016/j.scitotenv.2023.166962



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