不同龄组杉木萌芽林生态系统碳含量特征

Carbon Content Characteristics in Different Age Groups of Chinese Fir Sprout Forest Ecosystem

植被和土壤有机碳含量的测定对于准确计量森林生态系统的碳储量具有重要意义。基于野外调查和室内仪器分析方法研究了不同龄组杉木萌芽林的碳含量,研究结果表明:不同龄组杉木萌芽林的各器官碳含量范围为456.91~502.60g/kg,各器官平均碳含量大小为:叶(494.32g/kg)>干(484.75g/kg)>根(475.39g/kg)>枝(473.92g/kg)。灌木层的总体平均碳含量为441.23g/kg,草本层的总体平均碳含量为403.37g/kg,凋落物层的总体平均碳含量为414.52g/kg。不同龄组杉木萌芽林的土壤有机碳含量范围为4.58~31.55g/kg,同一龄组内,随着不同土层深度的增加,土壤有机碳含量逐渐降低;同一土层深度内,中龄林碳含量最低,成熟林碳含量最高。该研究可为杉木林的固碳机理研究和可持续经营提供科学依据。

The determination of organic carbon content in vegetation and soil is of great significance for accurately measuring carbon storage in forest ecosystem.Based on field investigation and indoor instrumental analysis methods, the carbon content in different age groups of Chinese fir sprout forest was studied. The results showed that the carbon content in different organs of different age groups of Chinese fir sprout forest was 456.91~502.60 g/kg, and the average carbon content in different organs was leaf[JP3](494.32 g/kg)>stem (484.75 g/kg)>root (475.39 g/kg)>branch (473.92 g/kg). The total average carbon content of shrub layer was 441.23 g/kg, herb layer was 403.37 g/kg, litter layer was 414.52 g/kg. The soil organic carbon content of Chinese fir sprout forest in different age groups was between 4.58 g/kg and 31.55 g/kg. In the same age group, the soil organic carbon content gradually decreases with the increase of different soil depths. Within the same soil depth, the middle-age forest carbon content was the lowest, and the mature forest carbon content was the highest. This study can provide scientific basis for carbon sequestration mechanism research and sustainable management of Chinese fir forest.