贵州杉木林植被碳贮量及碳密度特征

The Characteristics of Carbon Density and Storage of Cunninghamia lanceolata Forest Vegetation in Guizhou

本文根据贵州省2009年第三次森林资源调查数据,结合前人研究成果,估算了贵州省杉木林植被碳贮量和碳密度特征。结果表明:2009年,贵州省杉木林植被碳贮量为16.362×10~6t,碳贮量以中龄林最高,为10.671×10~6t,各地杉木林植被碳贮量在0.090×10~6~10.845×10~6t之间,杉木林碳密度随着林分龄级的增大而增大,最大是过熟林,为25.073tC·hm^(-2),平均碳密度为16.139tC·hm^(-2),各地杉木林植被碳密度在7.967~15.570tC·hm^(-2)之间,以黔东南州最高,为15.570tC·hm^(-2),黔西南州第二,为13.014tC·hm^(-2),铜仁市最低,仅为7.967tC·hm^(-2),碳密度分布呈东部高北部低的趋势;贵州杉木林植被的现实碳吸存潜力为57.075×10~6t,不同龄组林分差异很大,表现为幼龄林(2.347×10~6t)<近熟林(18.146×106t)<中龄林(36.582×10~6t),各地杉木林植被的现实碳吸存潜力在0.388×10~6~33.206×10~6t之间;贵州省杉木林分质量总体不高,中幼龄林所占比重较大。

According to the third survey data of forest resources in Guizhou, 2005, Referring to other previous researches , the carbon storage and carbon density characteristics of C. lanceolata forest vegetation in Guizhou were estimated. The results showed that , in 2005, the C. lanceolata vegetation carbon storage in Guizhou was 16. 362 ×106 t, among which the highest was midmaturation forest, 10.671 ×106 t. The carbon storage ranged from 0. 090 ×106 to 10. 845 ×106t in different districts. The carbon density increased with the age-class of forest stand, and the overripe forest was the largest, 25. 073tC · hm-2. The average carbon density was 16. 139tC ·hm-2. The average carbon density ranges from 7. 967 to 15. 570tC · hm-2. And Southeast Qian was the highest, 15. 570 tC · hm-2 ; the second Qianxinan, 13. 014tC · hm -2; Tongren City the lowest, only 7. 967 tC · hm-2. The distribution of carbon density occurred as a trend of east high and north low. The real carbon sequestration potential of C. lanceolata forest vegetation in Guizhou province was 57. 075 ×106 t, and it differed greatly in different age-classes showing young forest （2. 347 ×106 t） 〈nearly ripe forest （18. 146 ×106 t）〈middle-aged forest （36. 582 ×106 t）. The real carbon sequestration potential ranged from 0. 388 ×106 to 33. 206× 106t in differrent districts. Overally, the quality of C. lanceolata forest is not high in Guizhou and young and middle--aged forests occupies a large proportion.