周至县森林植被碳储量及碳密度研究

Carbon Reserve and Carbon Density of Forests in Zhouzhi County

利用模型模拟法、完全收获法和生物量碳含量转换系数以及森林资源二类调查资料,研究了周至县森林植被碳储量及碳密度,结果为周至县森林植被碳储量762.78万t,平均碳密度50.26t·hm-2,其中有林地总碳储量为641.61万t,不同林分之间碳密度为2.651～72.441t·hm-2、平均53.443t·hm-2,疏林地碳储量144.51万t,不同疏林地碳密度为1.837～50.270t·hm-2、平均46.817t·hm-2,灌木林碳储量6.66万t,不同灌木林的碳密度2.37～29.34t·hm-2、平均9.20t·hm-2;平均碳密度高于全国和全省平均值,低于近邻、全域为山区的宁陕县。

Based on the data of forest resources inventory and planning,methods of model simulation,complete harvest and biomass calculation were applied to determine the carbon reserve and carbon density in Zhouzhi county.The result showed that the total carbon reserved by forest resources in Zhouzhi reached 7.6278 million tons,with mean carbon density at 50.26 tons/hm 2.The carbon reserve in forestland was 6.4161 million tons and carbon densities of different forest types ranged from 2.651 tons/hm 2 to 72.441 tons/hm 2,with the mean density at 53.443 ton/hm 2.The sparse forests have carbon reserve 1.4451 million tons/hm 2 ranging from 1.837 tons/hm 2 to 50.270 tons/hm 2,with mean density at 46.817 tons/hm 2.Shrub forests have carbon reserve 66,600 tons/hm 2 ranging from 2.37 tons/hm 2 to 29.34 tons/hm 2,with mean density at 9.20 tons/hm 2.The mean carbon density of forest resources is above the mean of country and the province but lower than that of Ningshan county,the neighbor county within Shaanxi.