土壤学报2011，Vol.48Issue(3)：563-569,7.
模拟酸雨对亚热带阔叶树苗土壤呼吸的影响
SHORT-TERM EFFECTS OF ACID RAIN ON SOIL RESPIRATION IN BROADLEAF TREE SAPLING-SOIL SYSTEMS IN SUBTROPICAL CHINA
摘要
Abstract
To explore short-term effects of acid rain on soil respiration in three zonal evergreen broadleaf tree sapling-soil systems, i.e. Paramecia latungensis ( PL), Cyclobalanopsis glauca (CG) and Elaeocarpus glabripetalus (EG), typical of Zhejiang Province, where acid rain pollution has been severe for a long time, showers of acid rain different in pH (2.5, 4. 0 and 5.6 separately) were simulated. Soil carbon effluxes (E) of the three sapling stands were monitored in various growing seasons. ( 1 ) When the stands were stressed by severe acid rain ( pH 2.5 ), E decreased significantly in all seasons in the PL stand; dropped in winter but rose in spring and summer in the CG stand compared to the control, and varied sharply only in winter in the EG stand. the effect of acid rain moderate in pH (4.0) was significant in the PL stand where E was lower than the control in all the two years except for in August 2007, when E was 25.3％ higher than the control; in the CG stand, E dropped well below the control in December 2006 and rose up to 1.96 μmol m-2 s -1 in August 2007; and in the EG stand, E decreased by 18.0％ only in November 2007. (2) the effect of acid rain on E was not significant in the PL and EG stands at the growing period-time scale. Although in the CG stand, E increased by 87.8％ and 11.1％ respectively, by exposure to severe acid rain and moderate acid rain, only the effect of severe acid rain was significant. (3) The leading factors affecting soil respiration were soil temperature and acid rain in the PL and CG stands; soil temperature in the EG stand; and acid rain in the CG stand, where a negative relationship of E with pH of acid rain was observed.关键词
酸雨/土壤呼吸/中亚热带/阔叶植物Key words
Acid rain/ Soil respiration/ Mid-substropical areas/ Evergreen broad-leaf tree sapling stands分类
资源环境引用本文复制引用
刘源月,江洪,李雅红,原焕英..模拟酸雨对亚热带阔叶树苗土壤呼吸的影响[J].土壤学报,2011,48(3):563-569,7.基金项目
国家自然科学基金项目(40671132)、科技部973项目(2005CB422207和2005CB422208)、科技部国际合作项目(20073819)、科技部重大科技基础项目(2007FY110300)资助 （40671132）
