干旱区荒漠<strong>-</strong>绿洲过渡带<strong>3</strong>种典型灌木气孔导度对环境变化的响应及其对蒸腾的调控

干旱区荒漠-绿洲过渡带3种典型灌木气孔导度对环境变化的响应及其对蒸腾的调控

郭飞,吉喜斌,金博文,赵丽雯,赵文玥,焦丹丹

The Response of Stomatal Conductance of Three Typical Shrubs to Environmental Change and Stomatal Regulation of Transpiration in an Arid Desert-oasis Ecotone

Fei GUO,Xibin JI,Bowen JIN,Liwen ZHAO,Wenyue ZHAO,Dandan JIAO

表2 各响应函数表达式及决定系数

Table 2 Fitting functions and their coefficients of determination

植物种类	响应函数	降雨前			降雨后
植物种类	响应函数	参数	R²	n	参数	R²	n
梭梭	$f (V P D) = \frac{a_{1}}{(a_{2} + V P D)}$	a₁=4.860, a₂=6.299	0.393^*	64	a₁=2.345, a₂=2.599	0.480^*	68
	$f (T) = b_{1} + b_{2} T + b_{3} T^{2}$	b₁=1.502, b₂=-0.049, b₃=0.001	0.339^*	64	b₁=0.462, b₂=0.013, b₃=-0.001	0.365^*	68
	$f (P A R) = \frac{(c_{1} + c_{2} P A R / c_{3})}{(1 + P A R / c_{3})}$	c₁=0.411, c₂=0.410, c₃=-316.650	0.084	64	c₁=0.358, c₂=0.362, c₃=-577.869	0.020	68
泡泡刺	$f (V P D) = \frac{a_{1}}{(a_{2} + V P D)}$	a₁=1.315, a₂=-0.247	0.630^*	64	a₁=1.352, a₂=0.891	0.770^*	68
	$f (T) = b_{1} + b_{2} T + b_{3} T^{2}$	b₁=3.960, b₂=-0.180, b₃=0.002	0.684^*	64	b₁=1.199, b₂=-0.027, b₃=-0.001	0.766^*	68
	$f (P A R) = \frac{(c_{1} + c_{2} P A R / c_{3})}{(1 + P A R / c_{3})}$	c₁=0.243, c₂=0.239, c₃=-141.822	0.092^*	64	c₁=0.627, c₂=0.173, c₃=245.925	0.214^*	68
沙拐枣	$f (V P D) = \frac{a_{1}}{(a_{2} + V P D)}$	a₁=2.768, a₂=2.516	0.529^*	64	a₁=2.327, a₂=2.770	0.543^*	68
	$f (T) = b_{1} + b_{2} T + b_{3} T^{2}$	b₁=1.922, b₂=-0.073, b₃=0.001	0.449^*	64	b₁=-0.532, b₂=0.088, b₃=-0.002	0.476^*	68
	$f (P A R) = \frac{(c_{1} + c_{2} P A R / c_{3})}{(1 + P A R / c_{3})}$	c₁=0.141, c₂=0.388, c₃=434.012	0.012	64	c₁=0.384, c₂=0.377, c₃=-315.311	0.080	68