Abstract

QUEVEDO GARCIA, Enrique; AREVALO GONZALEZ, Martha Esperanza  and  CANCINO ESCALANTE, Giovanni Orlando. DETERMINATION OF A MATHEMATICAL MODEL TO ESTIMATE THE AREA AND DRY WEIGHT OF THE LEAF LIMBO OF Prunus persica CV. Jarillo. Rev. Fac. Nac. Agron. Medellín [online]. 2012, vol.65, n.2, pp.6605-6613. ISSN 0304-2847.

Abstract. A study was conducted to determine the variables that estimated the leaf limbo area and the leaf limbo dry weight of peach Prunus persica (L.) Batsch cv. Jarillo. Fifty leaves, aged 2.5 months, were selected and measured: leaf limbo length and width, petiole length, leaf length, petiole diameter, leaf limbo fresh weight, petiole fresh weight, leaf fresh weight, leaf limbo dry weight, petiole dry weight, leaf dry weight, length/width limbo, petiole length/limbo length and leaf limbo area. The results allowed to obtain regression equations for estimating the leaf area and the limbo dry weight. Using the lineal models LA = b₁ + b₂ (LLL x LLW) and LA= b₁+ b₂LLL + b₃LLW a leaf area equation was determined. Alternative models to calculate limbo dry weight were evaluated LLDW = -b₁+ b₂ LLFW and LLDW= - b₁ + b₂LLL + b₃PL. The best equations found with an R2 of 0.99 were LA = 1.572 + 0.65169(LLL x LLW), LA=-23.106+2.8064LLW + 3.6761LLL and LLDW = -0.002+0.401(LLFW).

Keywords : Fruits; regression models; leaf limbo length; leaf limbo width.

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