Folia Horticulturae

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The use of linear measurements for defining of leaf area blades in cultivation of greenhouse tomato

W. Starzecki*, A. Libik**, E. Gembołyś**

**Institute of Plant Physiology
**Polish Academy of Sciences
**Sławkowska 17, 31-016 Kraków, Poland
**Institute of Vegetables and Ornamental Plants
**Faculty of Horticulture, Agricultural University
**29 Listopada 54, 31-425 Kraków, Poland

The determination of the surface area of a leaf blade for evaluating the total assimilative surface of greenhouse tomato was investigated in this work. The length of the leaf axis and the largest width of the leaf were accepted as the basic criteria for measurement. Regression curves and correlation coefficients were calculated on the basis of the multiplicative model, Y=axb, where the fiducial point was the surface of particular leaves, determined planimetrically. They were compared with the length of the leaf axis or the area of a rectangle calculated from the length and width of the leaf.

The obtained results are characterized by high correlation coefficients which in the case of leaves of the cultivar Bisena reached 0.96 when compared with the area of the rectangle and 0.94 when referred to the leaf axis length. In the case of the cultivar Ostona the respective correlation coefficients were 0.86 and 0.85. The elaborated method may be applied in calculating the surface of leaves of particular plants and hence allows the evaluation of the total assimilative surface of a tomato crop.

Starzecki W., Libik A., Gembołyś E., 1989. The use of linear measurements for defining of leaf area blades in cultivation of greenhouse tomato. Folia Horticulturae I/1: 21-29.