Estimation of Leaflet, Leaf, and Total Leaf Area of Panax quinquefolius L. Using Linear Measurements1
Open Access
- 1 March 1981
- journal article
- Published by American Society for Horticultural Science in Journal of the American Society for Horticultural Science
- Vol. 106 (2) , 167-170
- https://doi.org/10.21273/jashs.106.2.167
Abstract
Leaflet length and width were used to calculate leaflet area, leaf area and total leaf area per plant for 3-year-old American ginseng, Panax quinquefolius L. grown in growth chambers. On the basis of correlation and regression analyses the product of leaflet length and width (LW) was chosen as the independent variable, but leaflet width squared (W2) also proved satisfactory. Although leaflet shape varied somewhat with position, one regression equation was found suitable. Assuming that the Y-intercept was equal to zero had little effect on the coefficient of determination (R2) or the standard error of estimation so the following equations were chosen to determine leaflet, leaf and total leaf area, respectively: A = 0.66 LW (R2 = 98.92%, ± 0.75 cm2); A = Σ0.67 LW (R2 = 98.36%, ± 2.49 cm2); A = Σ0 .67 LW (R2 = 97.36%, ± 7.83 cm2). The relationship between leaflet LW and total leaf area per plant was used to determine leaf area per plant and LAI for commercial ginseng crops 1, 2, 3, and 4 years old.Keywords
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