江西九江地区森林土壤有机碳含量及其影响因素  

Organic Carbon Content and Influencing Factors of Different Forest Soils in Jiujiang,Jiangxi Province

作　　者：杜有新[1,2] 宋祖祥 何春林[2] 周赛霞[1] 黄强[1] 

机构地区：[1]江西省中国科学院庐山植物园,江西庐山332900 [2]南昌航空大学环境与化学工程学院,江西南昌330063 [3]江西省九江市林业局,江西九江332000

出　　处：《土壤通报》2013年第3期575-579,共5页Chinese Journal of Soil Science

基　　金：江西省自然科学基金项目(2009GZN0084)资助

摘　　要：为阐明地处亚热带北缘的九江地区森林土壤有机碳水平及其主要影响因素，在庐山南、北坡分别选择6个和5个不同海拔点的典型植被群落，并在九江市丘陵分别选择7种典型林分，分层采集土样，测定了有机碳含量。结果表明：北坡森林表层土壤（0～20cm）有机碳含量处于18．47～33．92gkg^-1之间，南坡为19．59～34．43gkg^-1。在0～20cm土层，油茶林有机碳含量（17．69±0．85gkg^-1）最低，针阔混交林最高（27．64±0．57gkg^-1）；在20～40em土层，毛竹林有机碳含量（14．08±1．21gkg^-1）最低，针阔混交林最高（20．19±0．40gkg-^1）。海拔、海拔与坡向的交互作用和植被类型显著影响着森林土壤有机碳，坡向没有关系。To illuminate the soil organic carbon and its influencing factors under northern subtropical forest stands in Jiujiang region, 6 and 5 plots were taken in the southern and northern slopes of Lushan Mountain, respectively, covered by typical vegetation communities with a 200 m interval of altitude. 7 representative vegetation types were selected in Jiujiang hilly area. The mineral soil samples were collected from 0 - 10 cm, 10 - 20 cm, 20 - 30 cm, 30 - 40 cm and 〉 40 cm soil layers in each profile, determining soil organic carbon contents. The results showed that the organic carbon content in topsoil （0 - 20 cm） in northern and southern slopes was within the range of 18.47 - 33.92 g kg^-1 and 19.59 - 34.43 g kg^-1, respectively. In the 0 - 20 cm soil layer, the organic carbon content under Camellia oleifera was the lowest （17.69 ±0.85 g kg-1） and the highest under the coniferous-broadleaved mixed forest （27.64 ± 0.57 g kg-1） among 7 vegetation types. In the 20 - 40 cm of soil, the organic carbon content under Phyllostachys edulis was the lowest （14.08 ± 1.21 g kg-1） and the highest under the eoniferous-broadleaved mixed forest （20.19 ± 0.40 g kg-1） among 7 vegetation types. The organic carbon content was significantly influenced by the altitude, vegetation types and the interaction between altitude and slope, but the organic carbon content was not related to the slope aspect.

关 键 词：九江 森林土壤 有机碳 影响因素 

分 类 号：S714[农业科学—林学]