| 柽柳不同季节树干液流特征及其与土壤含水量及土壤温度的关系 |
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| 引用本文： | 黄雅茹,马迎宾,辛智鸣,罗凤敏,刘湘杰,李永华,,,张雅楠.柽柳不同季节树干液流特征及其与土壤含水量及土壤温度的关系[J].西北林学院学报,2021,36(5):1-10. |
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| 作者姓名： | 黄雅茹 马迎宾 辛智鸣 罗凤敏 刘湘杰 李永华 张雅楠 |
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| 作者单位： | （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.中国林业科学研究院 荒漠化研究所，北京 100091；3.库姆塔格荒漠生态系统国家定位观测研究站，甘肃 敦煌 736200；4.甘肃敦煌荒漠生态系统国家定位观测研究站，甘肃 敦煌 736200；5.内蒙古自治区水文与水资源中心，内蒙古 呼和浩特 010010） |
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| 摘 要： | 为揭示库姆塔格沙漠东南部柽柳的水分传输过程，探究柽柳的耗水特性，本研究利用PS-TDP8树木茎流监测系统对柽柳的树干液流速率进行测定，分析土壤因子与液流速率在不同季节的差异。结果表明，夏季树干液流的启动时间最早，为7:20，峰值最大（6.93 cm·h-1），春季启动时间为7:40，峰值为6.46 cm·h-1，秋季启动时间最晚，为8:40，峰值最小（4.22 cm·h-1）。在日尺度上，春、夏、秋季柽柳树干液流速率与土壤含水量及土壤温度呈正相关，土壤温度分别单独能解释61.1%、65.6%、64.0%的树干液流变化，土壤含水量与土壤温度分别共同能解释73.4%、74.1%、76.9%的树干液流变化。在小时尺度上，春、夏、秋季树干液流与20、50 cm层土壤含水量及土壤温度呈显著负相关，50 cm层土壤温度是影响树干液流的主导因子。本研究建立了不同季节柽柳液流速率与土壤因子之间的回归方程，能够较好地解释不同季节树干液流速率变化，为柽柳树干液流速率预测与耗水量估算提供了很好的途径，明确了在不同季节通过土壤因子估算柽柳树干液流速率的可行性，可为制定水分管理措施提供参考。
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| 关 键 词： | 柽柳 树干液流 库姆塔格沙漠 林地土壤 |
Flow Characteristics of Tamarix chinensis Tree Trunk Fluid in Different Seasons and the Relationships with Soil Water Content and Soil Temperature |
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| HUANG Ya-ru,MA Ying-bin,XIN Zhi-ming,LUO Feng-min,LIU Xiang-jie,LI Yong-hua,,' target="_blank" rel="external">,ZHANG Ya-nan. Flow Characteristics of Tamarix chinensis Tree Trunk Fluid in Different Seasons and the Relationships with Soil Water Content and Soil Temperature[J].Journal of Northwest Forestry University,2021,36(5):1-10. |
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| Authors: | HUANG Ya-ru MA Ying-bin XIN Zhi-ming LUO Feng-min LIU Xiang-jie LI Yong-hua " target="_blank">' target="_blank" rel="external"> ZHANG Ya-nan |
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| Institution: | (1.Experimental Center of Desert Forestry,Chinese Academy of Forestry,Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station,Dengkou 015200,Inner Mongolia,China; 2.Institute of Destertification Studies,Chinese Academy of Forestry,Beijing 100091,China; 3.National Forestry Bureaus Kumtage Desert Ecosystem Location Research Station,Dunhuang 736200,Gansu,China) |
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| Abstract: | In order to reveal the water transport process and water consumption characteristics of Tamarix chinensis occurring in the southeast part of Kumtag Desert,in this study,the flow rate of T.chinensis trunk sap was measured by the PS-TDP8 system.The relationships between sap flow and soil factors in different seasons were analyzed.The results showed that the sap flow of T.chinensis trunk had the earliest start time (7:20 a.m.) in summer with the highest peak value (6.93 cm·h-1).The start time in spring was 7:40 a.m.with the peak value of 6.46 cm·h-1.In autumn,the start time was the latest (8:40 a.m.) with the smallest peak value (4.22 cm·h-1).On a daily scale,the flow rate was positively correlated with soil water content and soil temperature in spring,summer and autumn.Soil temperature alone could explain 61.1%,65.6% and 64.0% of the sap flow changes in spring,summer and autumn,respectively,soil water content and soil temperature together could explain 73.4%,74.1% and 76.9% of sap flow changes,respectively.On an hourly scale,the sap flow in the three seasons was significantly and negatively correlated with the soil moisture content and soil temperature in the 20 and 50 cm soil layers.Soil temperature of 50 cm layer was the dominant factor affecting sap flow.Regression equations between the sap flow rate and soil factors in different seasons were established,which could better explain the changes of the sap flow rates in different seasons,and provide a good way to predict the sap flow rate and water consumption of the T.chinensis.The results also indicated that the estimation of the sap flow rate by soil factors in different seasons was feasible.This study can provide a reference for formulating water management measures. |
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| Keywords: | Tamarix chinensisTamarix chinensis sap flow Kumtag Desert forest soil |
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