Changes in soil organic carbon and aggregate stability following a chronosequence of Liriodendron chinense plantations  

作　　者：Qicong Wu Xianghe Jiang Qianwen Lu Jinbiao Li Jinlin Chen 

机构地区：[1]Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,People’s Republic of China

出　　处：《Journal of Forestry Research》2021年第1期355-362,共8页林业研究（英文版）

基　　金：the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).

摘　　要：The objectives for this study were to determine changes in soil organic carbon(SOC)components and water-stable aggregates for soil profi les from diff erent ages of plantations of Liriodendron chinense and to clarify which organic carbon component is more closely associated with the formation and stability of soil aggregates.Three layers of soil(depths 0–20 cm,20–40 cm,40–60 cm)were collected from young,half-mature and mature stages of L.chinense.SOC,readily oxidizable organic carbon,chemically stable organic carbon and aggregate composition were determined.Intermediate stable organic carbon,the microbial quotient and aggregate stability(mean weight diameter)were calculated.SOC and aggregate stability in the L.chinense plantation did not increase linearly with an increase in L.chinense age;rather,they fi rst decreased,then increased with increasing age of L.chinense.The microbial quotient had a negative eff ect on the level of organic carbon and the stability of aggregates,while chemically stable organic carbon had a positive eff ect,which explained 55.0%and 19.3%of the total variation,respectively(P<0.01).Therefore,more attention should be paid of these two indicators in the future.

关 键 词：Soil organic carbon Aggregate stability Liriodendron chinense plantation CHRONOSEQUENCE Soil depth 

分 类 号：S714.2[农业科学—林学]