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Universidad Autónoma de Nuevo León (2013)

Perfil nutricional de arbustivas del matorral espinoso tamaulipeco consumidas por el venado cola blanca

Alvarado, María del Socorro

Titre : Perfil nutricional de arbustivas del matorral espinoso tamaulipeco consumidas por el venado cola blanca.

Auteur : Alvarado, María del Socorro

Université de soutenance Universidad Autónoma de Nuevo León

Grade : Doctor en Ciencias con Especialidad en Manejo de Recursos Naturales UANL, 2013.

Résumé
The Tamaulipan thornscrub ecosystem has a diversity of woody plants species which are used as forage by white-tailed deer, these species are adapted to the extreme conditions of low rainfall and high temperature, typical of this semiarid area. The general objective of the study was to determine chemical composition, macro and micro nutrients contents and digestibility of Acacia amentacea, Castela erecta texana, Celtis pallida, Croton cortesianus, Forestiera angustifolia, Karwinskia humboldtiana, Lantana macropoda, Leucophyllum frutescens, Prosopis laevigata, Syderoxylon celastrinum and Zanthoxylum fagara. The samples were collected on a seasonally basis during two years in the counties of China, Linares and Los Ramones, in Nuevo Leon state, Mexico. The macro and micro nutrients to C. erecta, C. pallida, F. angustifolia, L. macropoda and Z. fagara had significative differences (P<0.001) in the triple interaction (site*year*season), their content by site was : Linares˃Los Ramones˃China higher to the minimum maintenance requirement of the white-tailed deer (expressed in g kg-1 of dry matter) Ca (4.5), K (6.0), Mg (1.0), Na (1.0) except in phosphorous. The micro nutrients (expressed in mg kg-1 of dry matter) had significative differences (P<0.001) in the triple interaction (site*year*season) where the content of Fe (40) and Mn (30) meet the minimum nutritional requirements of maintenance of wild and domestic small ruminants but to Zn and Cu only marginally with F. angustifolia - L. macropoda and L. macropoda - Z. fagara, respectively. There were differences (P<0.001) in the triple interaction (site*year*season) of the eleven shrub species on chemical composition but only C. pallida, Z. fagara and F. angustifolia showed nutritional favorable attributes : high content of crude protein (16%), low content of cell wall (40% in C. pallida and F. angustifolia) and lignin (8% in C. pallida and Z. fagara), higher digestibility of dry matter (˃ 60%), higher content of digestible energy and metabolizable energy, mainly during winter and their low content of INDF. C. pallida yielded the highest nutrient values in this study, but it is not documented as preferred species by White-tailed deer, nevertheless, it could be valuable as emergency species. In general, all shrub species have low energy content to meet white-tailed deer requirements, but diversity in the habitat and therefore in the diet of the white-tailed deer is important. It is necessary to develop exhaustive research on the nutritional values of these species and the capacity of white-tailed deer to take advantage of them

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Page publiée le 18 octobre 2016, mise à jour le 9 août 2017