橡胶人工林碳储量变化和固碳潜力分析  

Analysis of Carbon Stock Changes and Carbon Sequestration Potential in Rubber Plantation

作　　者：熊子蕙 王旭[1] 杨怀 翁国杰 吴昊[1] 于磊 马优 XIONG Zihui;WANG Xu;YANG Huai;WENG Guojie;WU Hao;YU Lei;MA You(College of Ecology and Environment,Hainan University,Haikou 570228,China;Sanya Research Base of International Centre for Bamboo and Rattan,Sanya 572000,Hainan,China)

机构地区：[1]海南大学生态与环境学院,海口570228 [2]国际竹藤中心三亚研究基地,海南三亚572000

出　　处：《热带亚热带植物学报》2025年第2期159-166,共8页Journal of Tropical and Subtropical Botany

基　　金：国家重点研发计划(2021YFD2200404)资助。

摘　　要：研究不同林龄橡胶林(Hevea brasiliensis)碳储量变化对了解橡胶林生态系统固碳潜力和碳循环过程具有重要意义。该研究以海南省儋州市不同林龄橡胶林为研究对象,分析不同林龄(6、12、18、23、27、35 a)橡胶林生长过程中乔木层、林下植被、枯落物、土壤及生态系统碳储量的变化,比较橡胶林生态系统固碳速率与固碳潜力。结果表明,乔木层碳储量为14.87~63.53 t C/hm^(2),依次为35 a>27 a>23 a>18 a>6 a。林下植被碳储量为0.30~0.75 t C/hm^(2),35 a林下植被碳储量显著高于其他林龄。枯落物碳储量为1.72~2.03 t C/hm^(2),18 a和35 a林的枯落物碳储量最高。土壤碳储量为81.21~156.68 t C/hm^(2),依次为27 a>18 a>23 a>12 a>35 a>6 a。在35 a的生命周期中有25.27 t C/hm^(2)被固定在土壤中,存在一个以碳固定为主到碳排放为主的转变过程。橡胶林生态系统总碳储量为98.30~214.74 t C/hm^(2),依次为27 a>18 a>23 a>35 a>12 a>6 a。6 a幼林龄碳储量显著低于27 a成熟林。土壤和乔木层碳储量是橡胶林的重要碳库,分别占生态系统总碳储量的68.16%~91.27%和16.71%~40.59%,枯落物碳储量小于2.1%,林下植被小于1%。橡胶林生态系统具有较大的固碳速率和固碳潜力,是营造高效固碳人工林、推动区域有效减排战略的理想树种。It is of great significance to study the carbon storage changes of rubber forest(Hevea brasiliensis)at different ages for understanding the carbon sequestration potential and carbon cycling process in rubber plantation ecosystems.Rubber forests of different ages(6,12,18,23,27,35 years old)in Danzhou City,Hainan Province were studied to analyze the changes of tree layer,understory vegetation,litter,soil and ecosystem carbon storage during the growth of rubber forests,and compare the carbon sequestration rate and carbon sequestration potential of rubber forest ecosystems.The results showed that the carbon stock in the tree layer ranged from 14.87 to 63.53 t C/hm^(2),in the order of 35->27->23->18->6-years old.The carbon stock of understory vegetation ranged from 0.30 to 0.75 t C/hm^(2),and which at 35 years old was significantly higher than that of other stands.The litter carbon stock ranged from 1.72 to 2.03 t C/hm^(2),and which in the 18-and 35-year-old forests were the highest.Soil carbon stock varied from 81.21 to 156.68 t C/hm^(2)in the order of 27->18->23->12->35->6-years old.During the life cycle of 35 years,approximately 25.27 t C/hm^(2)of carbon was fixed in the soil,and there is a transition process from carbon fixation to carbon emission.The total carbon stock of rubber forest ecosystems ranged from 98.30 to 214.74 t C/hm^(2)in the order of 27->18->23->35->12->6-years old.Notably,the carbon storage of 6-years old plantation was significantly lower than that of 27-years old mature plantation.Carbon storage in soil and tree layer was an important carbon reservoir of rubber forest,accounting for 68.16%-91.27%and 16.71%-40.59%of the total ecosystem carbon storage,which in litter was less than 2.1%,and that in understory was less than 1%.Rubber forest ecosystem had a high carbon sequestration rate and carbon sequestration potential,which was an ideal tree for building efficient carbon sequestration plantation and promoting regional effective emission reduction strategy.

关 键 词：橡胶林 碳储量 固碳速率 生态系统 

分 类 号：S71[农业科学—林学]