若尔盖高原三种湿地土壤有机碳分布特征  

The Distribution Characteristics of Soil Organic Carbon in Three Kinds of Wetland Soils in Zoigê Plateau

作　　者：高俊琴[1] 雷光春[1] 李丽[1] 吕偲[1] 白明英[2] 

机构地区：[1]北京林业大学自然保护区学院,北京100083 [2]太原师范学院城市与旅游学院,山西太原030012

出　　处：《湿地科学》2010年第4期327-330,共4页Wetland Science

基　　金：中央高校基本科研业务费专项资金项目(BLYX200932);国家自然科学基金项目(30700108;41071329);林业公益性项目(200804005);国家"十一五"科技支撑项目(2008BADB0B01)资助

摘　　要：研究了若尔盖高原3种典型湿地(泥炭沼泽、腐殖质沼泽和沼泽化草甸)土壤有机碳密度,有机碳含量分布及其与水分含量的关系。结果表明,若尔盖典型泥炭土有机碳含量最高(230～270g/kg),其分别是腐殖泥炭土的1.3～3.3倍和腐殖土的6.75～15.3倍。同样,泥炭土有机碳密度最大(52～66kg/m3),其次是腐殖泥炭土(40～75kg/m3),最小是腐殖土(14～30kg/m3)。腐殖土有机碳储量只相当于泥炭土和腐殖泥炭土的37%左右。腐殖泥炭土和腐殖土有机碳含量和水分含量之间均存在显著相关关系(n=18,p<0.01),说明水分条件的改变,尤其是排水疏干等干扰措施会直接影响其有机碳的积累。Soil organic carbon density,soil organic carbon（SOC） distribution characteristics and the relationship between SOC content and soil water content were studied in humus soil,humus peat soil and peat soil based on the wetland status in the Zoigê Plateau.Results showed that the SOC content of peat soil was the highest（230 270 g/kg）,which was 1.3-3.3 times than that of humus peat soil and 6.75-15.3 times than that of humus soil in study area.SOC density along soil profile in peatland varied little（52-66 kg/m3） but greatly in humus peat soil（40-75 kg/m3）.SOC pool in humus soil was only 37% of that in peat soil and humus peat soil.The relationship between SOC content and water content of humus peat soil and humus soil were significantly（p 0.01）,which indicated that the change of water,especially the drainage could significantly influence the organic carbon accumulation of wetlands in the Zoigê Plateau.

关 键 词：腐殖土 腐殖泥炭土 泥炭土 土壤有机碳 若尔盖高原 

分 类 号：S152.5[农业科学—土壤学]