火地塘林区锐齿栎林土壤碳循环的动态模拟

The soil carbon cycle dynamic simulation of Sharptooth oakforest at the Huoditang Forest Region

依据土壤碳循环的分室模型,对火地塘林区锐齿栎林土壤碳各分室的碳储量和通量进行了初步分析。结果表明,火地塘林区锐齿栎林土壤有机碳储量为174.055t/hm2,其中矿质土壤层有机碳储量为167.810t/hm2,凋落物层(A0层和死细根)中的碳储量为6.245t/hm2(A0层占80.5%,死细根占19.5%)。森林植物每年凋落输入到凋落物层中的碳量(包括地上部分的枯枝落叶和地下部分的细根)为3.297t/hm2,其中地上部分占52.5%,地下部分占47.5%,凋落物层分解每年以腐殖酸的形式输入到矿质土壤中的碳量为0.935t/hm2;锐齿栎林地年(生长季节)呼吸释放碳量(含植被根系呼吸量)为6.109t/hm2。

Using soil carbon cycle compartment model,carbon storage and flux of each soil carbon compartment of Sharptooth oak forest in Huoditang forest region were analyzed in this paper.The results showed that the soil organic carbon storage density of the region was 174.055 t/hm^2,it was 167.810 t/hm^2 and 6.245 t/hm^2 of mineral soil layer and litter fall respectively.In litter fall layer,it accounts for 80.50% and 19.50% of A_0-layer and dead fine root layer.The amounts of annual carbon input into litter fall layer (including overground litter and underground fine roots) via plant litter fall was 3.297 t/hm^2.The upper part accounts for 52.5%,the underground part accounts for 47.5%.The amount of annual carbon input into mineral soil via humus acid formed by litter decomposing was 1.178 t/hm^2.The amounts of annual (during growth season) carbon released by respiration of Sharptooth oak forest (including vegetation root system respiration) were 6.109 t/hm^2.