摘要
以凤阳山自然保护区常绿阔叶林与杉木Cunninghamia lanceolata林、柳杉Cryptomeria fortunei林与针阔混交林0~20 cm土层为研究对象,采用干筛法,研究同一采样点不同林分类型土壤团聚体有机碳、易氧化有机碳、稳定态有机碳的变化特征。结果表明:总体上,各林分土壤团聚体内有机碳、易氧化有机碳和稳定态有机碳含量随团聚体粒径变小均呈逐渐升高趋势。常绿阔叶林土壤团聚体有机碳、易氧化有机碳、稳定态有机碳分别在0.5~2.0 mm(14.81 g/kg)、0.5~2.0 mm(1748.28 mg/kg)和<0.5 mm(3.35 g/kg)粒径内最高,杉木林与常绿阔叶林分布规律一致;针阔混交林土壤团聚体有机碳、易氧化有机碳、稳定态有机碳分别在<0.5 mm(12.77 g/kg)、2~5 mm(1724.65 mg/kg)和<0.5 mm(2.88 g/kg)粒径内最高,柳杉林均在<0.5 mm粒径内最高。常绿阔叶林各粒径团聚体内有机碳、易氧化有机碳和稳定态有机碳含量基本高于杉木林同粒径;柳杉林各粒径团聚体内有机碳和稳定态有机碳含量也基本高于针阔混交林。随粒径变小,各林分土壤团聚体的易氧化有机碳/有机碳的比值呈逐渐降低的趋势,而稳定态有机碳/有机碳的比值呈逐渐升高的趋势,这表明小粒径团聚体内有机碳比大粒径稳定性更强。
Using the dry screening method,the 0~20 cm soil of Evergreen broad-leaved forest and Cunninghamia lanceolata forest,coniferous and broad-leaved mixed forest,and Cryptomeria fortunei forest in the national nature reserve of Fengyang Mountain were investigated to research the variation characteristics of total organic carbon,readily oxidized and recalcitrant organic carbon of soil aggregates under different forest stand types of the same sampling spot.The results showed:The contents of total organic carbon,readily oxidized and recalcitrant organic carbon of soil aggregates increased mainly with the decrease of aggregate size.In the different diameter aggregates of an evergreen broad-leaved forest,total organic carbon of 0.5~2.0 mm(14.81 g/kg),readily oxidized organic carbon of 0.5~2.0 mm(1748.28 mg/kg)and recalcitrant organic carbon of<0.5 mm(3.35 g/kg)were the highest respectively.Cunninghamia lanceolata forest was the same as the evergreen broad-leaved forest.In the different diameter aggregates of coniferous and broad-leaved mixed forest,total organic carbon of<0.5 mm(12.77 g/kg),readily oxidized organic carbon of 2~5 mm(1724.65 mg/kg)and recalcitrant organic carbon of<0.5 mm(2.88 g/kg)were the highest respectively.In Cryptomeria fortunei forest,total organic carbon,readily oxidized organic carbon and recalcitrant organic carbon was the highest all-in<0.5 mm.Total organic carbon,readily oxidized and recalcitrant organic carbon of the equal diameter aggregates of evergreen broad-leaved forest were higher than Cunninghamia lanceolata forest basically.Total organic carbon and recalcitrant organic carbon of the equal diameter aggregates of Cryptomeria fortunei forest were higher than coniferous and broad-leaved mixed forest basically.The readily oxidized organic carbon/total organic carbon of all forest stand types decreased gradually with the decrease of aggregate diameter,however recalcitrant organic carbon/total organic carbon increased gradually.It showed that the organic carbon of small-diameter aggregates was more stable than that of large-diameter aggregates.
作者
茹军
张勇
王志坚
王增
姚任图
RU Jun;ZHANG Yong;WANG Zhijian;WANG Zeng;YAO Rentu(Zhejiang Forestry Information and Publicity Service Center,Hangzhou,Zhejiang 310020,China;Key Laboratory of Soil Contamination Bioremediation of ZheJiang Province,Zhejiang A&F University,Hangzhou,Zhejiang311300,China;Zhejiang Ecological Forest and State Forest Farm Administration,Hangzhou,Zhejiang310020,China;Lincun Forest Farm of Songyang County,Lishui,Zhejiang 323400,China)
出处
《林业与环境科学》
2022年第4期108-115,共8页
Forestry and Environmental Science
基金
浙江省土壤污染生物修复重点实验室开放基金(FSLAB2021006)。
关键词
林分类型
土壤团聚体
有机碳
易氧化有机碳
稳定态有机碳
forest stand types
soil aggregates
organic carbon
readily oxidized organic carbon
recalcitrant organic carbon
