摘要
【目的】探讨9个树种凋落物之间及同一树种鲜叶凋落物和枯叶凋落物之间的酸缓冲能力差异及其影响因素,为酸雨背景下人工造林树种选择及可持续经营提供依据。【方法】在模拟酸雨条件下,测定9个南方常见树种的鲜叶凋落物和枯叶凋落物的酸缓冲能力、pH值、比叶面积、平均吸水速率和淋洗液盐基离子含量等指标,分析不同树种凋落物酸缓冲能力及同一树种鲜叶凋落物与枯叶凋落物酸缓冲能力的差异及其影响因素。【结果】(1)不同树种鲜叶凋落物和枯叶凋落物的酸缓冲能力均存在显著差异,粉单竹、香樟及无患子鲜叶凋落物和枯叶凋落物的酸缓冲能力均较强。(2)不同树种鲜叶凋落物和枯叶凋落物酸缓冲能力的影响因素不同,鲜叶凋落物酸缓冲能力的影响因素为凋落物pH值和比叶面积,枯叶凋落物酸缓冲能力的影响因素为凋落物pH值、比叶面积、平均吸水速率和淋洗液K+、Mg2+含量。(3)鲜叶凋落物和枯叶凋落物酸缓冲能力的差异与树种有关;杉木、马尾松和木莲鲜叶凋落物的酸缓冲能力显著高于枯叶凋落物,而粉单竹、香樟、垂枝红千层和无患子鲜叶凋落物的酸缓冲能力显著低于枯叶凋落物;鲜叶凋落物与枯叶凋落物酸缓冲能力的影响因素也与树种有关。【结论】9个树种的鲜叶凋落物和枯叶凋落物都能对酸雨起到缓冲作用;不同树种凋落物的酸缓冲能力存在显著差异;同一树种鲜叶凋落物和枯叶凋落物的酸缓冲能力也存在差异;粉单竹、香樟、无患子等树种的鲜叶凋落物和枯叶凋落物酸缓冲能力均较强。
【Objective】This study aimed to clarify the difference in acid buffering capacity between litters of 9 tree species,between fresh and withered leaf litter,and their influencing factors,and provide a basis for selection of afforestation tree species and sustainable management of artificial forests under acid rain background.【Method】Under the simulated acid rain condition,fresh and with ered leaf litter of 9 common tree species in southern China were assessed on acid buffering capacity,pH,specific leaf area,average water absorption rate and base ion content of leachate.The differences in the acid buffering capacity of litter of different tree species,acid buffering capacity of fresh and withered leaf litter of the same tree species,and its influencing factors were analyzed.【Result】(1)Tree species and fresh and withered leaf litter varied greatly in acid buffering ability,and both the fresh and withered leaf litters of Bambusa chungii,Cinnamomum camphora,and Sapindus saponaria were superior to other species in acid buffering capacity.(2)The factors influencing the acid buffering capacity of fresh and withered leaf litter were different,with pH and specific leaf area playing pivot roles in deciding the acid buffer capacity of fresh leaf litter,while pH,specific leaf area,average water absorption rate and K+and Mg2+contents of leach solution being the major factors in deciding the acid buffer capacity of the withered litter.(3)The acid buffering ability of fresh and withered leaf litter of the same tree species was related to the tree species.The acid buffering capacity of the fresh leaf litters of Cunninghamia lanceolata,Pinus massoniana,and Manglietia fordiana was significantly higher than their withered counterparts,while the acid buffering capacity of the fresh leaf litters of B.chungii,C.camphora,Callistemon viminalis and S.saponaria was significantly lower than that of their withered counterparts.The primary factors causing the differences in acid buffering ability between fresh and withered leaf litt
作者
范淇玮
龙瑜
余鑫
周时宇
朱泓静
余慧英
郑文辉
FAN Qiwei;LONG Yu;YU Xin;ZHOU Shiyu;ZHU Hongjing;YU Huiying;ZHENG Wenhui(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;School of Civil Engineering,Sanming University,Sanming,Fujian 365004,China;Fujian Provincial Key Laboratory of Resources and Environment Monitoring and Sustainable Management and Utilization,Sanming,Fujian 365004,China;School of Resources and Chemical Engineering,Sanming University,Sanming,Fujian 365004,China)
出处
《福建农林大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第5期654-661,共8页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
国家自然科学基金项目(42007102)
中国博士后基金项目(2023M730605)
福建省自然科学基金项目(2020J01376)
福建省中青年教师教育科研项目(JAT200644)
三明学院引进高层次人才项目(19YG13)。
关键词
酸雨
叶片性状
酸缓冲能力
非正常凋落物
acid rain
leaf trait
acid buffering capacity
abnormal litter
