燕山南麓不同林龄板栗林碳储量及分配格局  

Ecosystem carbon storage and within-system distribution in Castanea mollissima plantations at different ages on the southern slope of Yan Mountain

作　　者：张凌恺 王妍[1] 赵艳霞[2] 郑振华[2] 沈会涛[2] ZHANG Lingkai;WANG Yan;ZHAO Yanxia;ZHENG Zhenhua;SHEN Huitao(School of Ecological and Environmental Sciences,Southwest Forestry University,Kunming 650224,China;Institute of Geographical Sciences/Hebei Engineering Research Center for Geographic Information Application,Hebei Academy of Sciences,Shijiazhuang 050011,China)

机构地区：[1]西南林业大学生态与环境学院,云南昆明650224 [2]河北省科学院地理科学研究所/河北省地理信息开发应用工程技术研究中心,河北石家庄050011

出　　处：《河北农业大学学报》2021年第2期79-85,共7页Journal of Hebei Agricultural University

基　　金：河北省自然科学基金项目(C2019302018);河北省青年拔尖人才支持项目(H20181319);河北省科学院人才培养工程资助项目(2020G16);云南省教育厅科学研究基金研究生项目(2020Y0388)。

摘　　要：选取燕山南麓不同林龄(4、8、12和16年)板栗林为研究对象,研究板栗林乔木层和土壤层碳储量及其分配格局随林龄的变化特征。结果表明,板栗林乔木层不同组分碳含量在429.6~465.4 g/kg之间;不同林龄树干碳含量之间有显著差异(P<0.05),且随林龄的增长呈降低趋势;不同林龄树根、树枝和树叶碳含量无明显差异;在人工经营措施下,土壤层(0~100 cm)碳含量随林龄增长呈先降后升的变化趋势,并且随土壤深度的增加而降低。4、8、12和16年板栗林乔木层碳储量分别是0.27、3.83、8.09和8.95 Mg/hm2,随林龄的增长呈显著增加趋势(P<0.05);除4年板栗林外,其他林龄不同组分碳储量大小排序表现为树干>树根>树枝>树叶。4、8、12和16年板栗林生态系统碳储量分别为60.055、49.523、58.727和67.528 Mg/hm2,其中土壤层占生态系统总碳储量的99.6%、92.3%、86.2%和86.7%。在板栗林经营过程中,生态系统碳储量随林龄增长呈先降低后增加的变化趋势,土壤层是板栗林生态系统的主要碳库。Carbon stocks and its distributions of the Castanea mollissima plantations at four age stages(4, 8, 12 and 16 year-old) were studied on the southern slope of Yan Mountain, Hebei Province. The results showed that the carbon contents in different organs of C. mollissima ranged from 429.6 to 465.4 g/kg. The carbon content of stems decreased significantly with stand age(P<0.05). However, no significant differences were observed in carbon content among the roots, branches, and leaves of the C. mollissima plantations with different stand ages. Under artificial management, the carbon content in the soil layer(0–100 cm) decreased first and then increased as forest aged, and it decreased with the increase of soil depth(P<0.05).The carbon storage of arbor layer in the forests of 4, 8, 12 and 16 year-old were 0.27, 3.83, 8.09 and 8.95 Mg/hm2, respectively. Except for the 4 year-old, plantation the carbon storage of the organs followed the order of: stem > root > branch > leaf. The carbon storage in the C. mollissima plantation ecosystems of 4, 8, 12 and 16 year-old were 60.055, 49.523, 58.727 and 67.528 Mg/hm2, respectively. Soil layer accounted for 99.6%, 92.3%, 86.2% and 86.7% of the total carbon storage, respectively. In the management of the C. mollissima plantations,carbon storage decreased firstly and then increased with the increasing age. Soil layer is the main carbon pool of the C. mollissima ecosystems.

关 键 词：板栗林 林龄 碳含量 碳储量 分配格局 

分 类 号：S718.5[农业科学—林学]