西北干旱区灌溉绿洲农田生态系统冠层导度估算及其在蒸散计算中的应用

郭飞, 吉喜斌, 金博文, 赵丽雯, 焦丹丹, 赵文玥, 张靖琳

Quantification of Canopy Conductance of the Agroecosystem in an Irrigated Oasis in Arid Regions of Northwest China and Its Application in Evapotranspiration Estimation

Fei Guo, Xibin Ji, Bowen Jin, Liwen Zhao, Dandan Jiao, Wenyu Zhao, Jinglin Zhang

表2 白天各时段模型表达式及决定系数

Table 2 Fitting functions of stomatal conductance and its coefficient of determination for different periods of daytime

不同时段	模型表达式	2010年决定系数	2011年决定系数
7:00-11:00	$g_{c} = g_{m a x} \frac{a_{1} + a_{2} P A R / a_{3}}{1 + P A R / a_{3}} (b_{1} + b_{2} V P D) (c_{1} + c_{2} T + c_{3} T^{2})$	0.805	0.806
11:00-17:00	$g_{c} = g_{m a x} \frac{a_{1} + a_{2} P A R / a_{3}}{1 + P A R / a_{3}} b_{1} e x p (b_{2} V P D) (c_{1} + c_{2} T + c_{3} T^{2})$	0.704	0.789
17:00-21:00	$g_{c} = g_{m a x} \frac{a_{1} + a_{2} P A R / a_{3}}{1 + P A R / a_{3}} (b_{1} + b_{2} V P D) (c_{1} + c_{2} T + c_{3} T^{2})$	0.654	0.618
全天	$g_{c} = g_{m a x} \frac{a_{1} + a_{2} P A R / a_{3}}{1 + P A R / a_{3}} b_{1} e x p (b_{2} V P D) (c_{1} + c_{2} T + c_{3} T^{2})$	0.706	0.730