| 引用本文: | 黄耀威,何清燕,姜守政,等.西南猕猴桃园蒸散发变化及敏感性分析[J].灌溉排水学报,2022,41(10):26-33. |
| HUANG Yaowei,HE Qingyan,JIANG Shouzheng,et al.西南猕猴桃园蒸散发变化及敏感性分析[J].灌溉排水学报,2022,41(10):26-33. |
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| 摘要: |
| 【目的】研究西南地区猕猴桃园气候因子和LAI对蒸散发（ET）的影响，Kc和Kcb的季节性变化。【方法】基于2018—2019年大田试验和Penman-Monteith模型，分析了西南猕猴桃园近地层水汽通量的控制机理，采用敏感性分析方法量化了猕猴桃园ET对气象要素的敏感性，基于单（双）作物系数法计算了Kc（Kcb）。【结果】①2018—2019年猕猴桃生育期蒸散发（ET）日平均值分别为2.71 mm/d和2.31 mm/d，空气动力项ET（ETaero）分别为1.87 mm/d和1.71 mm/d，占总ET的0.69和0.74；②2018—2019年生育期猕猴桃ET对VPD的敏感性最高，其次是rc、Rn-G和ra；③2018—2019年生育期猕猴桃园Kc值随生育期先增大后减小，Kcb值在生育后期有增大的趋势，2018、2019年的Kc平均值分别为0.93和0.85，Kcb平均值分别为0.43和0.41。【结论】本研究发现空气动力项是驱动猕猴桃园ET的主要因素，ET对VPD的敏感性最高。 |
| 关键词: 猕猴桃园；蒸散发（ET）；Penman-Monteith模型；敏感性；作物系数 |
| DOI：10.13522/j.cnki.ggps.2022106 |
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| Evapotranspiration of Kiwifruit Orchards and Its Sensitivity to Meteorological Factors in Southwest China |
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HUANG Yaowei, HE Qingyan, JIANG Shouzheng, CUI Ningbo, ZHAO Lu,ZHENG Shunsheng, YANG Binhuan, ZOU Qingyao, WANG Qikai
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1. Tate Key Laboratory of Hydraulics and Mountain River Engineering/College of Water Resource and Hydropower,
Sichuan University, Chengdu 610065, China; 2. Sichuan Reseach & Design Institute of Agricultural Machinery,
Chengdu 610066, China; 3. OYVIO (Chengdu) Modern Agriculture Co., Ltd., Chengdu 611600, China
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| Abstract: |
| 【Objective】Evapotranspiration (ET) is an important hydrological component and parameter for agricultural management. It varies with both plantations and meteorological factors. In this paper, we studied the effect of climate change and leaf area index (LAI) on ET, as well as the seasonal variation in crop coefficient of kiwifruit orchards in southwest China. 【Method】The study was based on field experiments. The Penman-Monteith model using data measured in 2018 and 2019 was used to calculate the potential ET, from which we analyzed the mechanisms underlying the near-surface water vapor flux. The sensitivity of ET to various meteorological factors was also calculated, and the real ET was calculated using a single crop coefficient (Kc) and dual crop coefficient (Kcb), respectively. 【Result】 ①In 2018 and 2019, the average daily ET was 2.71 mm/d and 2.23 mm/d respectively, the aerodynamic term in ET was1.87 mm/d and 1.71 mm/d, respectively, accounting for 0.69 and 0.74 of the total ET. ②During the growth period of the kiwifruit in both 2018 and 2019, ET was most sensitive to VPD, followed by rc、Rn-G、ra. ③In both 2018 to 2019, Kc increased first followed by a fall as the plant grew, while the Kcb increased in the late growth stage. The average Kc in 2018 and 2019 was 0.93 and 0.85, and its associated average Kcb was 0.43 and 0.41, respectively. 【Conclusion】Our results show that the aerodynamic term was the main factor affecting ET in the kiwifruit orchard, while the ET was most sensitive to VPD. |
| Key words: Kiwifruit Orchard; ET; Penman-Monteith Model; sensitivity; crop coefficient |
