辽东山区不同林型土壤有机碳剖面分布特征及碳储量研究

Profile Distribution and Storage of Soil Organic Carbon of Main Forest Types in Eastern Mountainous Region of Liaoning

以辽东山区主要林型:蒙古栎、胡桃楸、枫桦、千金榆、水曲柳、花曲柳、油松、人工落叶松及人工红松林地土壤为材料,通过测定分析不同林型土壤的容重、机械组成、有机质和全氮含量,研究了不同林型土壤有机碳剖面分布特征及其碳储量。结果表明:土壤有机碳含量及碳储量的剖面分布特征均为:表层>亚表层>底层,并且随土层加深、土壤容重增加而呈现递减趋势;不同林型土壤(0～20cm)有机碳储量分布:花曲柳>枫桦>胡桃楸>油松>千金榆>人工落叶松>人工红松林>水曲柳>蒙古栎;在粉粒、粘粒含量高的林地土壤中,有机碳储量相对较高。

The profile distribution and storage of soil organic carbon （SOC） of main forest types in eastern Liaoning province of China were studied. The results indicated that both the SOC contents and storage distributions changed in the same way along soil profile： surface layer 〉 subsurface layer 〉 substrate; both of them showed decreasing trend with the increase of soil depth and soil bulk density. The total SOC storages （0 - 20 cm） of different forest lands are as follows： F. rhynchophyUa 〉 Betula costata 〉 Juglans mandshurica 〉P. tabulaeformis 〉 Carpinus cordata 〉Larix gemellini〉Larix kaempfer〉 Fraxinus mandshurica 〉 Quercus mongolica. The SOC storage is relatively high in the soil with high silt and clay contents.