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单一林种碳储量和碳密度的精确估算是区域森林碳储量研究的重要基础。以沙地樟子松天然林为研究对象,采用清查数据、地面调查数据与多源遥感数据相结合,建立林分结构估算方法,在此基础上估算樟子松天然林集中分布区(即内蒙古红花尔基林业局管辖区)樟子松林地上碳储量和碳密度;结合地形要素,探讨其空间分布特征。结果表明:Landsat-8 OLI穗帽变换绿度与胸径有较强的相关性,2016年研究区内樟子松天然林面积为70923.30 hm~2,地上(干、枝、叶)碳储量总计为3.91 TgC,平均碳密度55.18 t·hm~(-2)(10.26~148.75 t·hm~(-2))。受人为干扰和自然要素作用下,碳储量和碳密度呈现随海拔升高先升后降,随坡度增大而减少。因樟子松喜光的生物学特性,碳密度在坡向上表现出阳坡最大,阴坡最小。根据碳储量/碳密度空间分布特征,分区经营可显著提高碳汇。
The accurate estimation of carbon stocks and carbon densities in a single forest is an important basis for the study of regional forest carbon stocks. Taking the natural forest of Pinus sylvestris var. Mongolica as the research object, using the inventory data, ground survey data and multi-source remote sensing data to establish the method of estimating the stand structure, on the basis of which, Honghuaerji Forestry Bureau jurisdiction) aboveground carbon storage and carbon density of Pinus sylvestris var. Mongolica; and combining with the topographical features, the spatial distribution characteristics of Pinus sylvestris var. Mongolica were discussed. The results showed that there was a strong correlation between the greenness and DBH of Landsat-8 OLI pan head. In 2016, the natural forest area of Pinus sylvestris var. Mongolica was 70923.30 hm ~ 2. Total carbon storage on the ground (stem, branch and leaf) 3.91 TgC, the average carbon density is 55.18 t · hm -2 (10.26 ~ 148.75 t · hm -2). Under anthropogenic disturbance and natural factors, the carbon storage and carbon density increased first and then decreased with increasing altitude, and decreased with the increase of gradient. Due to the biological characteristics of the hippocampus, the carbon density shows the largest sunny slope and the smallest shady slope. According to the spatial distribution of carbon storage / carbon density, zonal operation can significantly increase carbon sinks.