广东省桉树人工林土壤有机碳密度及其影响因子  

Soil organic carbon density of Eucalyptus plantations in Guangdong Province of China and related affecting factors.

作　　者：刘姝媛[1,2] 刘月秀[1,3] 叶金盛 宫彦章[1,2] 曾曙才[1,2] 

机构地区：[1]华南农业大学林学院,广州510642 [2]农业部生态农业重点开放实验室,广州510642 [3]南京林业大学森林资源与环境学院,南京210037 [4]广东省林业调查规划院,广州510500

出　　处：《应用生态学报》2010年第8期1981-1985,共5页Chinese Journal of Applied Ecology

基　　金：广东省社会发展计划项目(2008B030302008);农业部生态农业重点开放实验室项目(2010-LH02)资助

摘　　要：研究了广东省粤北、粤东、粤西和珠江三角洲4个地区桉树人工林土壤有机碳含量和有机碳密度,以及土壤有机碳密度的主要影响因子.结果表明:土壤A层和B层有机碳含量分别为(23.94±2.97)g.kg-1和(9.68±1.05)g.kg-1,二者差异显著;A层和B层有机碳密度分别为(27.64±7.72)t.hm-2和(108.36±9.37)t.hm-2,有显著差异;0～50 cm土层有机碳密度为(66.72±6.53)t.hm-2,略高于同一地区马尾松和杉木人工林.有机碳密度与海拔、A层和B层土壤总孔隙度、毛管孔隙度、毛管持水量和全氮含量呈显著正相关;土壤毛管孔隙度、毛管持水量和pH值是影响有机碳密度的主导因子.Soil samples were collected from the Eucalyptus plantations in the north,east,and west Guangdong and Pearl River Delta region to study their organic carbon content and density,and the main factors affecting the organic carbon density.In the plantations,the soil organic carbon content and density in A and B horizons were significantly different,with the values of（23.94±2.97） g·kg-1 and（9.68±1.05） g·kg-1,and（27.64±7.72） t·hm-2 and（108.36±9.37） t·hm-2,respectively.In 0-50 cm soil layer,the organic carbon density was 66.72±6.53 t·hm-2,being slightly higher than that in Masson pine and Chinese fir plantations in Guangdong.In both A and B horizons of Eucalyptus plantations,soil organic carbon density was significantly positively correlated with altitude,soil total porosity,capillary porosity,capillary moisture capacity,and total nitrogen content.Soil capillary porosity,capillary moisture capacity,and pH value were the main factors affecting the soil organic carbon density.

关 键 词：桉树人工林 土壤有机碳 有机碳密度 广东省 

分 类 号：S714[农业科学—林学]