广西南丹县秃杉人工林碳储量及其分布格局  

Carbon Storage and Distribution of Taiwania flousiana Plantation Ecosystem in Nandan County,Guangxi

作　　者：刘凡胜 韦明宝 莫少壮 杨正文 何斌[2] 南雅薇 惠柳笛 LIU Fan-sheng;WEI Ming-bao;MO Shao-zhuang(Shankou Forest Farm of Nandan County,Nandan,Guangxi 547200)

机构地区：[1]南丹县山口林场,广西南丹547200 [2]广西大学林学院,广西南宁530004

出　　处：《安徽农业科学》2022年第6期98-100,105,共4页Journal of Anhui Agricultural Sciences

基　　金：广西重点研发计划项目(桂科AB17292008);广西创新驱动发展专项资金项目(桂科AA17204087-11);国家自然科学基金资助项目(31760201,31560206)。

摘　　要：采用标准样地法对广西南丹县20年生秃杉人工林碳储量及其空间分布格局进行研究。结果表明,秃杉各器官碳含量为436.4~501.2 g/kg,其由大到小依次为干皮、树枝、树根、干材、树叶。灌木层、草本层和凋落物层碳含量分别为449.8、392.5和424.7 g/kg。土壤(0~80 cm)平均碳含量为19.0 g/kg,各土层碳含量随土层深度增加而减少。20年生秃杉人工林生态系统碳储量为255.81 t/hm^(2),其中乔木层为99.43 t/hm^(2),占整个生态系统碳储量的38.87%;灌草层为2.14 t/hm^(2),占0.84%;凋落物层为2.52 t/hm^(2),占0.98%;林地土壤(0~80 cm)为151.72 t/hm^(2),占59.31%。秃杉人工林各器官碳储量与其生物量成正比关系,干材的生物量最大,其碳储量也最高,占植被层碳储量的59.48%,树枝、树叶、干皮和树根的碳储量共占36.05%。20年生秃杉人工林乔木层年净生产力为12.52 t/(hm^(2)·a),有机碳年净固定量为5.98 t/(hm^(2)·a),年净CO 2吸收量为21.93 t/(hm^(2)·a)。The spatial distribution of carbon storage in 20-year-old Taiwania flousiana plantation in Nandan County of Guangxi were studied by standard plot method.The results showed that carbon content in different organs of T.flousiana range from 436.4 g/kg to 501.2 g/kg,and the order from large to small was bark>branch>roof>stem>leaf.The carbon contents of shrub layer,herb layer and litter layer were 449.8,392.5 and 424.7 g/kg,respectively.The average carbon content of soil(0-80 cm)was 19.0 g/kg,and the carbon content of each soil layer decreases with the increase of soil depth.The total carbon storage in T.flousiana plantation ecosystems amounted to 255.92 t/hm^(2),of which tree layer stored 99.43 t/hm^(2),and accounted for 38.87%,shrub and herb layer stored 2.14 t/hm^(2),and accounted for 0.84%,litter layer stored 2.52 t/hm^(2),and accounted for 0.98%,soil layer stored 151.72 t/hm^(2),and accounted for 59.31%.The carbon storage of each organ of T.flousiana plantation was in positive proportion to its biomass.The biomass of dry wood was the largest,and its carbon storage was also the highest,accounting for 59.48%of the carbon storage of tree layer.The carbon storage of branches,leaves,dry bark and roots accounted for 36.05%.The annual net productivity of 20-year-old T.flousiana plantation was 12.52 t/(hm^(2)·a),and annual carbon fixation was 5.98 t/(hm^(2)·a),and the annual net CO 2 absorption was 21.93 t/(hm^(2)·a).

关 键 词：秃杉人工林 碳储量 碳分配 

分 类 号：S718.55[农业科学—林学]