| 不同时间尺度胡杨液流速率与土壤因子的关系 |
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| 引用本文： | 黄雅茹,马迎宾,李永华,董雪,刘源,于猛,韩春霞,菅凯敏,马海峰.不同时间尺度胡杨液流速率与土壤因子的关系[J].中国农业科技导报,2022,24(6):196-205. |
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| 作者姓名： | 黄雅茹 马迎宾 李永华 董雪 刘源 于猛 韩春霞 菅凯敏 马海峰 |
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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.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 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项(CAFYBB2020ZE005);国家自然科学基金项目(32001374) |
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| 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，SWC200cm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，Ts200cm、SWC50cm、SWC20cm、SWC200cm4个因子可以共同解释胡杨93.2%的液流速率变化，其中，Ts200cm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，Ts200cm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。
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| 关 键 词： | 胡杨 液流 库姆塔格沙漠 土壤因子 |
| 收稿时间： | 2021-05-08 |
Relationships Between Soil Factors and Populus euphratica’s Sap Flow at Different Time Scales |
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| Yaru HUANG,Yingbin MA,Yonghua LI,Xue DONG,Yuan LIU,Meng YU,Chunxia HAN,Kaimin JIAN,Haifeng MA.Relationships Between Soil Factors and Populus euphratica’s Sap Flow at Different Time Scales[J].Journal of Agricultural Science and Technology,2022,24(6):196-205. |
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| Authors: | Yaru HUANG Yingbin MA Yonghua LI Xue DONG Yuan LIU Meng YU Chunxia HAN Kaimin JIAN Haifeng MA |
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| Abstract: | 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，SWC200cm was the main factor influencing the sap flow of Populus euphratica， which could explain 94.9% of sap flow changes. On the daily scale， Ts200cm， SWC50cm， SWC20cm and SWC200cm 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 Ts200cm was the main influence factor， which could explain 90.3% of the sap flow changes of Populus euphratica. On the hourly scale，Ts200cm 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. |
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| Keywords: | Populus euphratica sap flow Kumtag Desert soil factors |
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