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不同时间尺度山杏树干液流密度对环境因子的响应
引用本文:韩新生,,许浩,刘广全,安钰,王月玲,董立国,郭永忠,万海霞.不同时间尺度山杏树干液流密度对环境因子的响应[J].西北林学院学报,2023,38(3):31-39.
作者姓名:韩新生    许浩  刘广全  安钰  王月玲  董立国  郭永忠  万海霞
作者单位:(1.宁夏农林科学院 林业与草地生态研究所/宁夏防沙治沙与水土保持重点实验室/宁夏生态修复与多功能林业综合研究中心,宁夏 银川 750002;2.中国水利水电科学研究院,北京 100038)
基金项目:宁夏自然科学基金项目(2019AAC03148);
摘    要:确定不同时间尺度树干液流的主要影响因子,对理解液流密度响应环境的驱动机制提供理论基础。以宁夏黄土丘陵区的山杏为对象,在生长季同步监测树干液流密度、气象要素、土壤环境等指标,分析时、日和月尺度树干液流对环境因子的响应关系。结果表明:1)日尺度上,树干液流与太阳辐射(Rs)、饱和水汽压差(VPD)、气温(Ta)、相对湿度(RH)、风速(Wa)、降雨量(Pre)、土壤水分(VSM)、土壤温度(Ts)8个环境因子相关性极显著;时尺度上,树干液流与除Wa外的其他7个环境因子呈极显著相关;月尺度上,树干液流仅与VSM、Ta呈极显著相关。2)从时尺度到日尺度,树干液流对VPD和Ts的响应程度逐渐增强;从日尺度到月尺度,树干液流对Rs、VPD、Ts的响应程...

关 键 词:树干液流  环境因子  时间尺度  山杏

 Responses of the Tree Trunk Sap Flow Density of Armeniaca sibirica to Environmental Factors in Different Time Scales
HAN Xin-sheng,' target="_blank" rel="external">,XU Hao,LIU Guang-quan,AN Yu,WANG Yue-ling,DONG Li-guo,GUO Yong-zhong,WAN Hai-xia. Responses of the Tree Trunk Sap Flow Density of Armeniaca sibirica to Environmental Factors in Different Time Scales[J].Journal of Northwest Forestry University,2023,38(3):31-39.
Authors:HAN Xin-sheng  " target="_blank">' target="_blank" rel="external">  XU Hao  LIU Guang-quan  AN Yu  WANG Yue-ling  DONG Li-guo  GUO Yong-zhong  WAN Hai-xia
Institution:(1.Institute of Forestry and Grassland Ecology,Ningxia Academy of Agriculture and Forestry Sciences/Ningxia Key Laboratory of Desertification Control and Soil and Water Conservation/Research Center for Ecological Restoration and Multi-Functional Forestry of Ningxia,Yinchuan 750002,Ningxia,China; 2.China Institute of Water Resources and Hydropower Research,Beijing 100038,China)
Abstract:The objective of this study was to determine the main influencing factors of tree trunk sap flow (TTSF) at different time scales to provide a theoretical basis for understanding the driving mechanism of liquid flow density in response to the environment.Taking Armeniaca sibirica in the loess hilly region of Ningxia as an example,the TTSF density,meteorological elements,soil environment and other indicators were simultaneously monitored during the growing season,and the response relationships of the TTSF on the hourly,daily and monthly scales to environmental factors were analyzed.The results showed that 1) on the daily scale,the TTSF had extremely significant correlations with eight environmental factors,including solar radiation (Rs),saturated vapor pressure deficit (VPD),air temperature (Ta),relative humidity (RH),wind speed (Wa),precipitation (Pre),soil moisture (VSM),and soil temperature (Ts).On the hourly scale,TTSF was extremely and significantly correlated with 7 other environmental factors except for Wa.On the monthly scale,TTSF was extremely and significantly correlated only to VSM and Ta.2) From the hourly scale to the daily scale,the response degree of TTSF to VPD and Ts gradually increased.From daily to monthly scales,the response of TTSF to Rs,VPD,and Ts gradually weakened,while the response to VSM gradually increased.On three time scales,the TTSF had positive responses to Rs,Ta,Ts,and VPD,and negative responses to RH,Wa,and VSM.3) The relationships between TTSF and environmental factors on three time scales were established.At smaller scales (hour),the selected factors included 7 factors,including Rs and Ta,etc.For the larger scale (month),only one factor (VSM) was selected.For the intermediate scale (day),four factors were selected,including VSM and Rs.As the scale changes from hour,day to month,the interpretation rates of TTSF were 61.5%,76.6%,and 80.5%,respectively.The primary influencing factors of TTSF on the hourly and daily scales were Rs,while it was VSM on the monthly scale.
Keywords:stem sap flow  environmental factor  time scale  Armeniaca sibirica Armeniaca sibirica
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