| 苹果树液流变化规律研究 |
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| 引用本文： | 丁日升,康绍忠,龚道枝.苹果树液流变化规律研究[J].灌溉排水学报,2004,23(2):21-25. |
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| 作者姓名： | 丁日升 康绍忠 龚道枝 |
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| 作者单位： | 西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100;西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100;中国农业大学,中国农业水问题研究中心,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(50279043) |
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| 摘 要： | 利用液流传感器(sapflowsensor)监测苹果树液流,并用自动气象站和土壤水分测定仪(TRIME-FM)对气象因素和土壤水分进行同步监测。分析了苹果树液流日变化和日际变化与太阳辐射强度的关系、苹果树液流Tr与参考作物蒸发蒸腾量ET0的相关性,以及Tr/ET0和100cm深的平均土壤相对含水率AW的关系。运用回归分析方法建立了液流通量与气象因子间的经验公式,并比较了预测值与实测值。其结果表明:液流变化曲线与太阳辐射的变化曲线较一致,太阳辐射是果树液流的首要影响因子;Tr和ET0变化曲线相似;相对含水率越大,Tr/ET0的值越大;反之越小;用经验公式预测的液流值与实测值相比较,二者最大相差10.13%,最小相差3.45%。
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| 关 键 词： | 热脉冲技术 液流 参考作物蒸发蒸腾量 气象因素 土壤含水率 |
| 文章编号： | 1000-646X(2004)02-0021-05 |
| 修稿时间： | 2003年12月15 |
Responses of Apple Trees Sap Flow to Temporal Change in Weather Condition and Soil Water Content by Heat-pulse Technique |
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| DING Ri-sheng,KANG Shao-zhong.Responses of Apple Trees Sap Flow to Temporal Change in Weather Condition and Soil Water Content by Heat-pulse Technique[J].Journal of Irrigation and Drainage,2004,23(2):21-25. |
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| Authors: | DING Ri-sheng KANG Shao-zhong |
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| Institution: | DING Ri-sheng~1,KANG Shao-zhong~ |
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| Abstract: | Sap flow sensor was used to monitor sap flow of apple tree. Meanwhile, an Automatic Weather Station and TRIME-FM system were applied to measure meteorological parameters and soil water content. It was studied on relationship about solar radiation and daily and diurnal variation of apple tree sap flow, apple tree sap flow (T_r) and evapotranspiration (ET_0), and relative soil water content in 100 cm deep averagely and T_r/ET_0. By regression method, it was established about the equation of meteorological parameters and T_r flux, comparing forecasting value in a month with measuring value. The results showed that: it is consistent in wave trend of T_r and solar radiation, and solar radiation is main influence factor. So is T_r and ET_0. The higher as relative soil water content is, the larger T_r/ET_0. Oppositely, it is lower. The comparison about forecasting and measuring results is as following: the maximum of difference is 10.13%, and the minimum 3.45%. |
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| Keywords: | Heat-pulse technique sap flow evapotranspiration weather condition soil water content |
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