Effects of Tending Thinning on Diameter Class Distribution and Carbon Sequestration Rate of Natural Forest of Larix gmelinii in Cold Temperate Zone
Tending thinning is an effective measure of forest management,and determining scientific and reason-able thinning intensity plays an important role in achieving sustainable forest management.Taking the natural forest of Larix gmelinii after different thinning intensities(10%,20%,30%,40%)in 2012 as the research object,the changes of tree diameter distribution,carbon density and carbon sequestration rate in different tending thinning in-tensity plots after 5 years and 10 years of restoration were analyzed.The results showed that with the increase of thin-ning intensity and recovery year,the forest frequency of middle and high diameter trees in natural forest of Larix gmelinii gradually increased,the one of small diameter trees decreased,and the left skew normal distribution gradu-ally shifted to the right.In each thinning plot,the carbon density of natural forest of Larix gmelinii decreased first with the increase of thinning intensity,and then increased after 5 years and 10 years.The carbon density distribution of each component was trunk>root>bark>branch>leaf.The carbon sequestration rate of natural forest of Larix gmelinii increased with the increase of thinning intensity,and the carbon sequestration rate in the 40%thinning in-tensity plot was the largest.
tending thinningdiameter distributioncarbon densitycarbon sequestration ratenatural forest of Larix gmelinii
NETL
NSTL
万方数据
