Quantifying Plant Water Use in the Native Coteau Rangelands of North Dakota

Figure 5


 

Figure 5. Leaf water use efficiency (WUE) in relation to stomatal conductance for two cool- season grasses.

Figure 5. Leaf water use efficiency (WUE) in relation to stomatal conductance for two cool- season grasses.

Figure 5. Leaf water use efficiency (WUE) in relation to stomatal conductance for two cool- season grasses.

Figure 5. Leaf water use efficiency (WUE) in relation to stomatal conductance for two cool- season grasses, Kentucky bluegrass (Poa pratensis)(KTK, KTKFOLD) and western wheatgrass (Agropyron smithii ) measured on 24-25 Sept. 2001 on three sites. “KTK” represents Kentucky bluegrass with expanded leaves (mostly from the fall season regrowth), and “KTKFOLD” represents individuals of this plant with folded leaves (probably represent more than 80% of the leaf population of Kentucky blue grass when data were collected). WUE is calculated as photosynthetic rate [mmol CO2 m-2 (leaf area) s-1(second)] divided by transpiration rate [mmol H2O m-2 (leaf area) s-1(second)].

  


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