应用生态学报2017，Vol.28Issue(3)：721-729,9.DOI:10.13287/j.1001-9332.201703.039
广西不同林龄喀斯特森林生态系统碳储量及其分配格局
Carbon storage and its allocation in karst forest at different stand ages in Guangxi, China
摘要
Abstract
Based on a survey of 45 plots (1000 m2 each) of five different stand ages,i.e.,young,middle-aged,pre-mature,mature,and over-mature plantations in the main production area of karst forest in Guangxi,carbon (C) storage and its allocation in vegetation and soil were studied.The results showed that the carbon storage of karst plantations in Guangxi changed in an increasing order of young plantation (86.03 t · hm-2),near-mature plantation (110.63 t · hm-2),middle-aged plantation (112.11 t · hm-2),mature plantation (149.1 t · hm-2),and then over-mature plantation (244.38 t · hm-2).The carbon storage distribution varied in both different vegetation la-yers and different stand ages.Tree layer was found to store the greatest amount of carbon by accounting for up to 92.3％-98.7％ of total vegetation carbon.The proportion of carbon stored in the tree layer increased with stand age.The proportions of carbon stored in the shrub layer,herb layer,litter and root were 0.3％-1.9％,0.3％-1.2％,0.3％-2.5％ and 0.3％-3.3％,respectively.Soil organic carbon density decreased as soil depth increased.The soil organic carbon storage over the whole soil profile ranged from 51.75 t · hm-2 to 81.21 t · hm-2.The proportion of soil organic carbon in total ecosystem carbon in karst forest ranged from 33.2％ to 66.2％,which decreased with stand age.The carbon storage for aboveground and underground parts were 22.80-141.72 t · hm-2 and 62.30-102.66 t · hm-2,respectively.Total ecosystem carbon storage was greater in underground part than in aboveground part except mature plantation.The carbon storage in aboveground part carbon increased with stand age but that in underground part changed insignificantly with the carbon storage of soil.The soil and tree layer were the major carbon pools of the forest ecosystems in the karst region,and the sum of carbon stored in soil and tree accounted for more than 96％ of total ecosystem carbon storage.关键词
生物量/碳储量/分配格局/林龄/喀斯特Key words
biomass/carbon storage/allocation/stand age/karst引用本文复制引用
胡芳,杜虎,曾馥平,宋同清,彭晚霞,兰斯安,张芳..广西不同林龄喀斯特森林生态系统碳储量及其分配格局[J].应用生态学报,2017,28(3):721-729,9.基金项目
本文由国家重点研发计划项目(2016YFC0502405)、国家自然科学基金项目(31370485,31370623,31400412)、广西重点研发计划项目(桂科AB16380255)、广西科技惠民项目(桂科转1599001-6)和广西特聘专家项目资助 This work was supported by the National Key Research and Development Program (2016YFC0502405),the National Natural Science Foundation of China (31370485,31370623,31400412),the Guangxi Key Research and Development Program (AB16380255),the Guangxi Benefiting Program of Science and Technology(1599001-6),and the Guangxi Program of Distinguished Expert. （2016YFC0502405）
