不同林龄桉树人工林土壤有机碳的变化  

Change of Soil Organic Carbon Content of Eucalyptus Plantation in Different Age

作　　者：梁关锋[1] 王纪杰[1] 俞元春[1] 陈容[1] 崔晓晓[1] 王维[1] 周垂帆[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《贵州农业科学》2011年第9期92-95,共4页Guizhou Agricultural Sciences

基　　金：国家林业公益性行业科研专项"人工林土壤质量演变机制与持续利用"(200804040);江苏省研究生培养创新工程项目"桉树人工林土壤质量演变机制研究"(CX10B_248Z)

摘　　要：为桉树人工林的土壤质量评价及持续利用提供科学依据,研究了不同林龄桉树人工林0~100cm土壤有机碳库的储量及有机碳密度的变化。结果表明,土壤有机碳含量及有机碳密度均随土层深度增加而呈降低趋势,不同种植年龄的人工林有机碳密度在表层（0~10cm）差异显著;桉树人工林土壤碳储量在46.41~103.32t/hm2,土壤碳储量总体上较高,1 a桉树林土壤碳储量最大,为103.32t/hm2,18a林地次之,为84.92t/hm2。较长轮伐周期有利于维持土壤有机碳库的稳定。Soil organic carbon content and organic carbon density of top 100 cm of Eucalyptus plantation in different age were studied to provide the scientific basis for the soil quality assessment and the sustainable exploitation.The results showed that soil organic carbon content（SOC）,organic carbon density（SOCd） in top 100 cm decreased when soil layers depth increased.In addition,SOCd changed significantly in the surface soil（0~10 cm）.Soil organic carbon storage（SOCs） of Eucalyptus plantation ranged from 46.41 t/hm2 to 103.32 t/hm2.In general,SOCs is relatively higher,and the SOCs of one year old Eucalyptus plantation is the highest（103.32 t/hm2）,followed by 18 years old Eucalyptus plantation（84.89 t/hm2）.Longer harvest period is good for the maintenance of SOCs.

关 键 词：桉树 人工林 土壤有机碳 碳储量 

分 类 号：S153.6[农业科学—土壤学] S714.2[农业科学—农业基础科学]