Estimation of leaf area by non-destructive methods in three iranian pistachio species (Pistacia mutica subsp. cabulica, Pistacia khinjuk subsp. oblonga and Pistacia khinjuk subsp. populifolia)
1999
Ranjbar, A. | Damme, P. van (Gent Univ. (Belgium). Dept. of Plant Production. Lab. of Tropical and Subtropical Agronomy and Ethnobotany)
The length of midrib and the maximum width of lamina (for all leaflets of each leaf) of 180 leaves Pistacia khinjuk subsp. populifolia, Pistacia khinjuk subsp. oblonga and Pistacia mutica subsp. cabulica (60 leaves from each subspecies) were used to develop non-destructive leaf area prediction models. Most models exhibited very significant predictive ability as shown by R2 values which ranged 0.88-0.98. However, a number of models were identified as being best suited for fieldwork and having good predictive value. These models combine leaf width and length according to [(L1 x W1) + (L2 x W2) + (L3 x W3)] x (mu/4), [(L1 x W1) + (L2 x W2) + (L3 x W3)] and (W1 + W2 + W3), where L1, L2, L3 are the length of the apical leafs midrib, the length of the first leaflet nearest to the apical leaf on the left and the length of the first leaflet nearest to the apical leaf on the right, respectively; and W1, W2, W3 are the maximum width of lamina for L1, L2 and L3 respectively.
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