Morphoagronomic variable selection for characterizing star grass growth under grazing conditions

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Published: Jul 4, 2013
Keywords:
Cynodon nlemfuensis, growth, morphological development, main components

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P. P. del Pozo
Facultad de Medicina Veterinaria, Universidad Agraria de La Habana

Abstract

The main component analysis was used to define which morphoagronomic indicators can explain star grass (Cynodon nlemfuensis) variation through its growth and development under grazing conditions (Voisin Rational Grazing, VRG and Rotational Grazing with 12 paddocks, RG-12) in the rainy season (May-October). Matrixes of 90 rows (regrowth age between 0 and 8 weeks) and 12 columns (morphoagronomic variables) were prepared and the correlation matrixes among traits were calculated. In both management systems, the first four main components explained 81 and 80.3 % total variability for VRG and RG-12 systems, respectively, with the same weighing and arrangement of components in those systems. Dry weight, leaf, stem and dead material porcentages, internode length and diameter, total dry matter content and its components were indicators showing the highest variation on plant growth. It is advisable to take into account these variables in morphophysiological studies of this species under the
conditions studied.

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How to Cite
del Pozo, P. P. (2013). Morphoagronomic variable selection for characterizing star grass growth under grazing conditions. Cultivos Tropicales, 21(1), 37–40. Retrieved from https://ediciones.inca.edu.cu/index.php/ediciones/article/view/735
Issue
Vol. 21 No. 1 (2000)
Section
Original Article

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