Biomass and Carbon Fixation and Oxygen Release Function of Larix gmelinii at Different Ages in Daxing'anling
Larix gmelinii is the main afforestation tree species in Daxing'anling.It examines the biomass,carbon fixation and oxygen release functions across different forest ages to provide a foundation for the rational and scientific management of Larix gmelinii in this area.The biomass and carbon fixation and oxygen release functions of different forest ages of Larix gmelinii were analyzed by field investigation and laboratory test.The results showed that:1)The stand structure of Larix gmelinii changed with the increase of forest age.Between ages 5 and 35 years,crown width increased from 1.11 m2 to 32.71 m2,with an average annual growth rate of 1.05 m2 per year.The diameter at breast height ranged from 1.11 to 27.1 cm,and the growth rate showed a trend of first being fast and then slow.2)The age from 5 years to 35 years,the biomass per plant was 0.25 to 411.73 kg per plant.The trunk consistently accounted for the dominant portion of a single plant's biomass,holding an absolute advantage in aboveground biomass.3)The carbon fixation and oxygen release functions of Larix gmelinii showed an upward trend with the increase of forest age.When the forest age was 35 years,the average annual carbon fixation was 119.02 kg,and the oxygen release was 318.64 kg.The biomass and carbon fixation and oxygen release functions of Larix gmelinii showed significant positive changes with the increase of forest age.Therefore,the continuous optimization and protection of Larix gmelinii have substantial potential for improving ecological conditions.
Larix gmeliniiforest agebiomasscarbon fixation and oxygen releaseDaxing'anling
NETL
NSTL
万方数据
