Chemical composition and protein degradability of native forages of the semiarid region of northern Mexico

Main Article Content

Maribel Guerrero
A. S. Ju?rez
R. G. Ram?rez
R. Montoya
M. Murillo
Oreste La O
Mar?a A. Cerrillo

Abstract

The chemical composition, the rate and degradability of the CP, the metabolizable energy (ME), and the metabolizable protein (MP) of trees
(2), shrubs (11), herbaceous plants (4), cactuses (3), flowers, fruits, and pods (8), consumed by small ruminants under pasture ground
conditions, were estimated. The chemical composition was determined by standard methods, and the ME, from the in vitro gas production
and the in situ CP degradability. The data were subject to analysis of variance for a completely randomized design, and the chemical composition was correlated with the CP degradability. The contents of NDF (65, 41, 46, 43, and 37 % DM, respectively), lignin (10, 8, 12,
2, and 7 % DM), hemicellulose (32, 18, 13, 30, and 10 % DM), cellulose (22, 16, 21, 11, and 20 % DM), ME (4.6, 6.6, 8.5, 7.3, and
7.8 MJ/kg DM), MP (4.9, 7.7, 7.3, 2.9, and 4.5 % DM), as well as the constant rate of degradation c of the CP (4.0 % h-1, 6.4, 4.4, 3.7, 8.7)
and the effective degradability of the CP (28, 55, 62, 77, and 76 %) were different in each set of plants. It is concluded that the nutritional value (ME and MP) of trees and herbaceous plants is high, as well as the cactuses and fruits in regards to ME. The constant rate of degradation c of the CP of fruits, trees, and herbaceous plants provide them with good nutritive potential for small ruminants under feedlot conditions. On the contrary, the effective degradability of CP allows classifying the trees under study as species of middle quality.
Key words: native plants, metabolizable energy, metabolizable protein, semi-desert, Mexico.

Article Details

How to Cite
Guerrero, M., Ju?rez, A. S., Ram?rez, R. G., Montoya, R., Murillo, M., La O, O., & Cerrillo, M. A. (2010). Chemical composition and protein degradability of native forages of the semiarid region of northern Mexico. Cuban Journal of Agricultural Science, 44(2). Retrieved from https://cjascience.com/index.php/CJAS/article/view/236
Section
Animal Science
Author Biographies

Maribel Guerrero

Facultad de Ciencias Biol?gicas, Universidad Aut?noma de Nuevo Le?n, Avenida Universidad, S/N, San Nicol?s de los Garza, Nuevo Le?n, 66450, M?xico

A. S. Ju?rez

Facultad de Medicina Veterinaria y Zootecnia, Universidad Ju?rez del Estado de Durango, km 11.5, Carretera Durango-Mezquital, Durango, 34280, M?xico

R. G. Ram?rez

Facultad de Ciencias Biol?gicas, Universidad Aut?noma de Nuevo Le?n, Avenida Universidad, S/N, San Nicol?s de los Garza, Nuevo Le?n, 66450, M?xico

R. Montoya

Facultad de Medicina Veterinaria y Zootecnia, Universidad Ju?rez del Estado de Durango, km 11.5, Carretera Durango-Mezquital, Durango, 34280, M?xico

M. Murillo

Facultad de Medicina Veterinaria y Zootecnia, Universidad Ju?rez del Estado de Durango, km 11.5, Carretera Durango-Mezquital, Durango, 34280, M?xico

Oreste La O

Instituto de Ciencia Animal, Apartado Postal 24, San Jos? de las Lajas, Mayabeque, Cuba

Mar?a A. Cerrillo

Facultad de Medicina Veterinaria y Zootecnia, Universidad Ju?rez del Estado de Durango, km 11.5, Carretera Durango-Mezquital, Durango, 34280, M?xico

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