不同时间尺度胡杨液流速率与土壤因子的关系  

Relationships Between Soil Factors and Populus euphratica’s Sap Flow at Different Time Scales

作　　者：黄雅茹[1,2] 马迎宾 李永华[4] 董雪 刘源[1,3] 于猛[1,3] 韩春霞 菅凯敏 马海峰 HUANG Yaru;MA Yingbin;LI Yonghua;DONG Xue;LIU Yuan;YU Meng;HAN Chunxia;JIAN Kaimin;MA Haifeng(Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station,Experimental Center of Desert Forestry,Chinese Academy of Forestry,Inner Mongolia Dengkou 015200,China;National Long-Term Scientific Research Base of comprehensive control in Ulan Buh Desert,National Forestry and Grassland Administration,Inner Mongolia Dengkou 015200,China;Combat Desertification Engineering Technology Research Center,National Forestry and Grassland Administration,Inner Mongolia Dengkou 015200,China;Institute of Ecological Conservation and Restoration,Beijing 100091,China;Bayannur City Forestry and Grassland Business Development Center,Inner Mongolia Bayannur 015000,China;Bayannur City Forestry and Grassland Resources Protection Center,Inner Mongolia Bayannur 015000,China)

机构地区：[1]中国林业科学研究院沙漠林业实验中心,内蒙古磴口荒漠生态系统国家定位观测研究站,内蒙古磴口015200 [2]乌兰布和沙漠综合治理国家长期科研基地,内蒙古磴口015200 [3]国家林业和草原局防沙治沙工程技术研究中心,内蒙古磴口015200 [4]中国林业科学研究院生态保护与修复研究所,北京100091 [5]巴彦淖尔市林业和草原事业发展中心,内蒙古巴彦淖尔015000 [6]巴彦淖尔市林业和草原资源保护中心,内蒙古巴彦淖尔015000

出　　处：《中国农业科技导报》2022年第6期196-205,共10页Journal of Agricultural Science and Technology

基　　金：中央级公益性科研院所基本科研业务费专项(CAFYBB2020ZE005,CAFYBB2021MA005);国家自然科学基金项目(32001374,41671049)。

摘　　要：为揭示土壤因子对胡杨液流的影响是否存在时间尺度差异,对库姆塔格沙漠东南部胡杨液流速率及20、50、100、150和200 cm土层的土壤含水量(soil water content,SWC)、土壤温度(soil temperature,Ts)进行持续5个月的同步观测。结果表明,月尺度下,SWC_(200cm)是胡杨液流速率变化的主要影响因子,单独能解释94.9%的液流速率变化;日尺度下,Ts_(200cm)、SWC_(50cm)、SWC_(20cm)、SWC_(200cm)4个因子可以共同解释胡杨93.2%的液流速率变化,其中,Ts_(200cm)可以解释液流速率变化的90.3%,对胡杨液流速率影响最大;小时尺度下,Ts_(200cm)对胡杨液流的影响最大,可以解释液流速率变化的51.6%。随着时间尺度的扩大,对液流速率变化的影响因子由多变少,可靠性由小变大。由此表明,根据土壤含水量及土壤温度预测小时尺度胡杨液流速率需要较多的参数,且可靠性较小;而预测月尺度液流速率需要较少的参数,且可靠性较大。因此,预测月尺度胡杨液流速率更为合适。In order to reveal the influence of soil factors on the sap flow at different time scale of Populus euphratica in Kumtag Desert,the sap flow of Populus euphratica and soil factors,such as soil water content(SWC)and soil temperature(Ts),were observed synchronously for 5 months.The results were followed,on the monthly scale,SWC_(200cm) was the main factor influencing the sap flow of Populus euphratica,which could explain 94.9% of sap flow changes.On the daily scale,Ts_(200cm),SWC_(50cm),SWC_(20cm) and SWC_(200cm) had greater influence on the sap flow changes of Populus euphratica,which 93.2% of the sap flow changes of Populus euphratica was explained by these 4 factors,and Ts_(200cm) was the main influence factor,which could explain 90.3% of the sap flow changes of Populus euphratica.On the hourly scale,Ts_(200cm) was the biggest influence factor on the sap flow velocity,which could explain 51.6% of the sap flow change.With the expansion of time scale,the number of factors affecting the flow rate changed from more to less,and the reliability changed from small to large.It showed that,based on the soil water content and soil temperature,the predicting of hourly sap flow rate in Populus euphratica required more parameters and had the less reliability,while the predicting of monthly sap flow rate required fewer parameters and had the more reliable.It was more appropriate to predict the sap flow rate of Populus euphratica at a monthly scale.

关 键 词：胡杨 液流 库姆塔格沙漠 土壤因子 

分 类 号：S792[农业科学—林木遗传育种]