Abstract
Pornunça is a species of the genus Manihot that has been cultivated as an option for animal feeding in the Brazilian semi-arid. Leaf area (LA) is important to determine forage plant growth, whose evaluation model has to meet the following characteristics: practicality, precision and low cost. The objective of this study was to set a model to determine the leaf area in Pornunça (Manihot sp.) from morphometric measurements of the leaf. The experimental design was in randomized blocks with three methods for determination of leaf area, and three blocks, with 144 replicates (leaves). For the determination of LA, the direct method (FAReal), treadmill leaf area meter (Li-Color 3100©) and linear dimensions were used. Data were subjected to regression analysis. There was a relationship between the actual leaf area (FAReal) for small, medium, large and total leaves, and the leaf area determined by the treadmill leaf area meter (FALi-Cor©) with a high coefficient of determination for linear fit. The Pornunça leaf area obtained by the Li-Cor3100© meter is approximately 10% lower compared to the FAReal method. The model that best fit the Ponunça leaf area estimation was the potential.
Highlights
Pornunça (Manihot sp) is a plant of the familyEuphorbiaceae, a direct relative of cassava (Manihot esculenta) and maniçoba (Manihot pseudoglaziovii) (Silva, Santos, Oliveira, Moraes, & Santana, 2009), which has been grown in the Brazilian northeastern region for animal feed
There was a relationship (Figure 1A, B and C) between the actual leaf area (AFReal) for small, medium, large and total leaves, and the leaf area determined by the treadmill leaf area meter (AFLiCor) with a high coefficient of determination for the linear fit
According to Francisco et al (2014), a high coefficient of determination indicates a close relationship between the leaf area and the linear measurements of the plants
Summary
Pornunça (Manihot sp) is a plant of the familyEuphorbiaceae, a direct relative of cassava (Manihot esculenta) and maniçoba (Manihot pseudoglaziovii) (Silva, Santos, Oliveira, Moraes, & Santana, 2009), which has been grown in the Brazilian northeastern region for animal feed. Pornunça (Manihot sp) is a plant of the family. According to Carvalho et al (2012), the quality of the Manihot species for animal feeding is evidenced. Animal Sciences by the high protein and non-fiber carbohydrates content in relation to other species commonly used. In this way, the rational exploitation of Pornunça shoots can be an important alternative for feeding ruminants in this region. For studies on the growth of plants, it is necessary to know the characteristics of growth and development. Among these characteristics, leaf area (LA) is an important parameter Leaf area (LA) is an important parameter
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