Evaluation of different empirical models for the estimation of leaf area in various cultivars of wheat

Leaf area is a key variable in physiological studies. Thus availability of accurate but simple models which can estimate leaf area are prime importance. Therefore for the assessment of empirical models for the estimation of leaf area in non-destructive methods، an experiment based on RCB design was performed using three wheat cultivars (Zarrin، Pishgam، Zare) each in three replicates. The measured traits were length، width، length×width، real leaf area and the dry weight of the leaf. Results showed that in Zarrin cultivar Y’= ea. ebLDW and Y’= ea. LDWb with R2=0. 60 and closeness to 1:1 line had a well estimation compared to others models of leaf area. Also، in Pishgam model LAI = a (DML) band) Y’=) ea. LDWb had the highest value of R2 between dry weight and leaf area. Others as: LAI= a+bL+cL2، LAI= aLW، LAI= a (LW) b، Y = a+b (D)، Y = ea. Db، TLAM= aLbWc models did not show good estimation of leaf area. The results revealed that، models based on dry matter of leaf showed better estimation of leaf area compared to other models.