Resumo

NAVAS PANADERO, Alexander; ARAGON HENAO, Laura Fernanda  e  TRIANA VALENZUELA, Jorge Fernando. Effect of tree component on the growth dynamics and nutritional quality of a mixed grassland in the high tropic. Rev. Med. Vet. [online]. 2020, n.41, pp.71-82.  Epub 07-Mar-2021. ISSN 0122-9354.  https://doi.org/10.19052/mv.vol1.iss41.7.

Livestock systems are based on the monoculture of grasses, grazing does not usually take into account the physiology of the species, this affects the persistence and quality of the forage. Silvopastoral systems favor forage production and quality, it is important to know the growth dynamics of the pasture to determine the optimal grazing moment. The objective of this work was to evaluate the effect of Acacia melanoxilum on the production and nutritional quality of a mixed meadow in the high tropics. The research was carried out at the “Santa María del Puyón” Research and Training Center, located in Sopo, Colombia. A meadow of Cenchrus clandestinum and Lolium perenne was evaluated, in alley pastures, plots were established under and outside the trees, the growth was evaluated (15, 30, 45 and 60 days) for nine months. The physicochemical properties of the soil, undisturbed height, number of leaves, leaf area index, production and quality of forage were determined. A random design was used, descriptive statistics and analysis of variance were performed. The Infostat® program was used for data analysis. Under the trees there is a higher ph, organic matter, minerals and cation exchange capacity, higher undisturbed height (p = 0.0001), differences in green forage production (p = 0.0128), botanical composition, and higher protein crude (p = 0.0061). A. Melanoxilum trees favor the growth and nutritional quality of mixed grasslands in the high tropics.

Palavras-chave : feeding; livestock; pastures; silvopastoral systems.

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