不同干扰强度下马尾松林土壤碳储量特征

Characteristics of Soil Carbon Storage of Pinus massoniana on Different Disturbance Intensity

摘要:

摘要：以三峡库区秭归县3种不同干扰强度下的马尾松天然林为研究对象，分析了不同马尾松林类型土壤碳储量特征，以及土壤碳储量与乔木层平均胸径、林分密度与郁闭度等因子的关系。结果表明：3种类型马尾松林0～60 cm土壤总碳储量分别为103.42,70.26 t·hm-2和54.81 t·hm-2，轻度干扰下的马尾松林土壤总碳储量比中度和重度干扰林分分别高47.20%和88.68%，且3种类型之间差异达到显著性水平（P＜0.05）。马尾松天然林土壤碳储量与平均胸径、林分郁闭度均具有显著的正相关关系（P＜0.05），而与林分密度相关性不显著（P≥0.05）。

Abstract:

Abstract:The forests of Pinus massoniana on three kinds of different disturbance intensity were selected in Zigui county. The soil organic carbon (SOC) storage characteristic was analyzed, and the relationship between soil carbon storage with mean diameter at breast height (DBH), forest density and canopy density was studied. The result showed that total SOC storage of three forest types in 0～60 cm layer was 103.42,70.26 t·hm-2and 54.81 t·hm-2 respectively, and the SOC storage in light disturbance forest was 47.20% percent and 88.68% percent higher than it of middle disturbance forest and serious disturbance forest, and the difference of SOC storage among three forest types was significant (P＜0.05). A positive significant correlation was found between total SOC storage and mean DBH, canopy density（P＜0.05）, while the total SOC storage was not correlated with forest density（P≥0.05）.