20. Determination of the leaf area of a whole plant of cape gooseberry (Physalis peruviana L.) (Brief report)

The purpose of the study was to create a formula for establishing the leaf area of the whole plant based on the findings of our previous investigation on the correction coefficients for determining the area of a single leaf of cape gooseberry (Physalis peruviana L.) by its diameter,. To this end, the whole plant was divided into 4 fractions with leaf areas S₁, S₂, S₃ and S4 respectively. Each added up the areas of all the leaves therein. The diameter (the widest part) of each leaf in the fraction was measured by using our proposed formulas and correction coefficients (Popova et al., 2010) its area was calculated. For the Sn leaf area of the whole plant the following formula is provided: S_n = S₁ + S₂ + S₃ + S₄, where  and n₁, n₂, n₃ и n₄ are the number of leaves in each fraction. Thus, the final formula is in the form:  . The accuracy of the proposed method is high, which makes it a fast and cheap method for determining the leaf area of Cape gooseberry (Physalis peruviana L.).