| Cite this article: | 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,(10):-. |
| 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,(10):-. |
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| Evapotranspiration Variation and Sensitivity Analysis of Kiwifruit Orchard in Southwest China |
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huang yaowei1, He qingyan2, jiang shouzheng1, cui ningbo1, zhaolu1, zheng shunsheng1, yang binhuan1, zou qingyao1, wang qikai3
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1.State Key Laboratory of Hydraulics and Mountain River Engineering/ College of Water Resource and Hydropower, Sichuan University;2.Sichuan Reseach & Design Institute of Agricultural Machinery;3.JOYVIO
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| Abstract: |
| To study the effects of climate and plant factors on evapotranspiration (ET) and transpiration (T) in kiwifruit orchards in southwest China is of great significance for understanding the water cycle and optimizing the allocation of water resources in the region. Based on the field experiment and Penman-Monteith model from 2018 to 2019, the control mechanism of near-surface water vapor flux in kiwifruit orchard in southwest China was analyzed. The sensitivity analysis method was used to quantify the sensitivity of ET and T to meteorological factors in kiwifruit orchard. The results showed that: (1) the daily average values of evapotranspiration (ET) during kiwifruit growth period from 2018 to 2019 were 2.34 mm d-1 and 1.95 mm d-1 respectively, and the aerodynamic term ET (ETareo) were 1.26 mm d-1 and 1.13 mm d-1 respectively, accounting for 0.69 and 0.74 of the total ET; (2) From 2018 to 2019, the daily average value of T in kiwifruit growth period was 1.19 and 1.00 mm d-1 respectively, and the aerodynamic term T (Taero) was 0.84 mm d-1 and 0.75 mm d-1 respectively, accounting for 0.75 and 0.80 of the total T; (3) During the growth period from 2018 to 2019, kiwifruit et had the highest sensitivity to water vapor pressure difference (VPD), followed by canopy resistance (rc), available energy (Rn-G) and Aerodynamics (ra); T has the highest sensitivity to canopy resistance term (rcp), followed by VPD, canopy available energy (Rnc) and aerodynamic term (ra). This study can provide a scientific theoretical basis for regional agricultural production management and rational utilization of water resources. |
| Key words: Kiwifruit;Orchard, Evapotranspiration (ET), Transpiration (T), Penman-Monteith;model, Sensitivity |
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