采脂对马尾松液流密度径向变化及整树蒸腾的影响  

Effects of resin-tapping on radial variation of sap flow density and whole tree transpiration in Pinus massoniana

作　　者：秦佳双 倪隆康 郑路[3] 谭羽 贾慧琳 廖苏慧 顾大形[1,2] QIN Jiashuang;NI Longkang;ZHENG Lu;TAN Yu;JIA Huilin;LIAO Suhui;GU Daxing(Guangxi Institute of Botany,Chinese Academy of Sciences/Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain/Guangxi Guilin Urban Ecosystem Observation and Research Station,Guilin 541006,Guangxi,China;Guangxi Guilin Urban Station(City Type)/Guangxi Guilin Lijiang River Station(Forest Type)of Ecological Quality Comprehensive Monitoring Station of Ministry of Ecology and Environment,Guilin 541006,Guangxi,China;Tropical Forestry Experimental Center,Chinese Academy of Forestry Sciences/Guangxi Youyiguan Forest Ecosystem Observation and Research Station/Youyiguan Forest Ecosystem Observation and Research Station of Guangxi,Pingxiang 532699,Guangxi,China)

机构地区：[1]广西壮族自治区中国科学院广西植物研究所/广西喀斯特植物保育与恢复生态学重点实验室/广西桂林城市生态系统定位观测研究站,广西桂林541006 [2]生态环境部生态质量综合监测站广西桂林城市站(城市)/广西桂林漓江站(森林),广西桂林541006 [3]中国林业科学研究院热带林业实验中心/广西友谊关森林生态系统定位观测研究站/崇左凭祥友谊关森林生态系统广西野外科学观测研究站,广西凭祥532699

出　　处：《应用生态学报》2025年第3期711-718,共8页Chinese Journal of Applied Ecology

基　　金：广西野外科学观测研究站项目(桂科22-035-130-03);桂科学者启动项目(CQZ-E-1918);国家自然科学基金项目(41830648,32060243);广西植物研究所基本科研业务项目(桂植业20413);广西野外台站开放课题(RLKF2022-01);广西林业科技推广示范项目(2023GXLK45)资助。

摘　　要：为探究采脂对马尾松液流密度径向变化及整树蒸腾的影响,本研究采用Granier热扩散探针法,测定了未采脂马尾松及连续采脂(2004—2015年)马尾松未割脂面和割脂面不同边材深度的液流密度。结果表明:未采脂马尾松、采脂马尾松未割脂面液流密度径向分布格局均为单峰型,采脂马尾松割脂面则为不规则型,采脂导致采脂马尾松割脂面液流密度径向分布格局发生改变。采脂马尾松割脂面液流密度显著低于未割脂面,采脂引起马尾松割脂面输水能力降低。除表层(0~2 cm)外,其他层(2~10 cm)采脂马尾松未割脂面液流密度均高于未采脂马尾松相应边材深度,形成对割脂面输水能力下降的补偿效应。采脂马尾松整树日均液流密度(710.49 kg·m^(-2)·d^(-1))仅为未采脂马尾松(856.63 kg·m^(-2)·d^(-1))的82.9%,说明未割脂面液流密度的增加并不能完全补偿割脂面输水能力的下降,割脂引起马尾松整树输水能力下降。采脂马尾松整树液流密度的日变化峰值出现时间比未采脂马尾松提前约1 h,表明割脂引起的整树输水能力下降已经引起了采脂马尾松的水分亏缺。未采脂马尾松、采脂马尾松未割脂面不同深度液流密度与整树液流密度均存在显著的相关性,通过便于测量的表层液流密度构建整树平均液流密度的估算方法,可获取较准确的整树蒸腾。We investigated the effects of resin-tapping on the radial differences of sap flow density and whole-tree transpiration in Pinus massoniana.We used the Granier's thermal diffusion probe method to measure sap flow density at different sapwood depths on non-resin-tapped P.massoniana and both the non-resin-tapped surface and resin-tapped surface of resin-tapped P.massoniana,that had undergone continuous resin tapping from 2004 to 2015.The results showed that the radial distribution patterns of sap flow density in the non-resin-tapped P.massoniana and on the non-resin-tapped surface of resin-tapped P.massoniana were unimodal,while that on the resin-tapped surface of resin-tapped P.massoniana was irregular.Resin-tapping altered the radial distribution pattern of sap flow density on the resin-tapped surface of resin-tapped P.massoniana.In addition,the sap flow density on the resin-tapped surface of P.massoniana was significantly lower than that on the non-resin-tapped surface,indicating that resin tapping reduced water transport capacity of the tapped surfaces.Except for the outer layer(0-2 cm),the density of sap flow on the non-resin-tapped surface was higher than that on the corresponding sapwood depth of the non-resin-tapped P.massoniana in other layers(2-10 cm),which would compensate the decreased water transport capacity of the resin-tapped surface.Furthermore,the whole-tree average daily sap flow density in resin-tapped P.massoniana(710.4 kg·m^(-2)·d^(-1))was 82.9% of that in the non-resin-tapped P.massoniana(856.63 kg·m^(-2)·d^(-1)),indicating that the increase in sap flow density on the non-resin-tapped surface could not fully compensate for the decline in water transport capacity of the resin-tapped surface,resulting in a decrease in the overall water transport capacity of the resin-tapped P.massoniana.Moreover,the appearing time of whole-tree daily maximum sap flow density in resin-tapped P.massoniana occurred approximately 1 hour earlier than that of non-resin-tapped P.massoniana,indicating that the decr

关 键 词：马尾松 割脂 树干液流 径向差异 补偿效应 

分 类 号：S71[农业科学—林学]