The Carbon Sink Dynamic Research on the Caragana microphylla andSalix gordejevii Shrub Ecosystem in the Southern Edge of Horqin Sandland
To understand the carbon sequestration of theCaragana microphylla andSalix gordejevii shrub ecosystem in the southern edge of Horqin Sandland, we choose theCaragana microphylla andSalix gordejevii shrub ecosystem plantation both of nine forest age sequences from the Aohanqi wind-sand region of Chifeng City as the study target. We use the Space for Time sample land approach to quantify the carbon density change rule of these two types of bush wood plantation in the level of shrub layer, herb layer, litter layer, soil layer and the ecosystem, analyze the carbon density and the annual carbon density change trend of shrub ecosystems with different planting years and make the equation for the planting years, carbon density and annual carbon sequestration rate. The results showed that: The carbon density for the shrub layer, herb layer, litter layer and the soil layer of theCaragana microphylla and Salix gordejevii increases as the planting years; the carbon density for each layer: the soil layer is the biggest, accounting for 60% and 75% of the ecosystem’s carbon density respectively; followed by carbon density of the shrub layer, accounting for 23% and 38% of the ecosystem’s carbon density respectively; the carbon density of the herb layer and the litter layer are minimum, both accounting for 1% of the ecosystem’s carbon density; The shrub layer carbon densities in various organs are branch > root > leaf, the herb layer carbon density in various organs are ground > underground; the carbon density changes of two shrubs over time could be expressed in log functions, the annual carbon sink rate for the ecology could be expressed by the power formula, when the planting years <10a, the annual carbon sink rate has a rapid growth, when the planting years > 10 a, the annual carbon sink rate declines. Our study suggests that the carbon density for theCaragana microphylla andSalix gordejevii shrub groups has obvious variation rules with certain carbon sink potentialities; when the planting years < 10a, the annual carbon sink rate has a rapid growth; with the growth of the planting years, the annual carbon sink rate declines, and it’s suggested to make effective forest management and tending measures on the forests and shrubs.
国家科技期刊平台
NSTL
万方数据
维普
