Effect of Brosimum alicastrum Foliage on Intake, Kinetics of Fermentation and Passage and Microbial N Supply in Sheep Fed Megathyrsus maximus Hay

Author:

Valdivia-Salgado Vicente1,Flores-Santiago Ever del Jesús2ORCID,Ramírez-Avilés Luis3ORCID,Segura-Correa José Candelario3ORCID,Calzada-Marín Jesús Miguel3ORCID,Ku-Vera Juan Carlos3

Affiliation:

1. Livestock Consultant, Estelí C.P. 31000, Nicaragua

2. Southeast University Regional Unit, Autonomous University Chapingo, Carr. Teapa-Vicente Guerrero km 7.5, Teapa C.P. 86807, Tabasco, Mexico

3. Faculty of Veterinary Medicine and Animal Science, University of Yucatan, Carr. Merida-Xmatkuil km 15.5, Merida C.P. 97100, Yucatan, Mexico

Abstract

An experiment was carried out to assess the effect of the incorporation of sun-dried foliage of Brosimum alicastrum into rations based on hay of Megathyrsus maximus on intake, rumen fermentation, kinetics of passage, microbial nitrogen supply to the small intestine, apparent digestibility in Pelibuey hair sheep. Four rations were randomly allotted to four rumen-cannulated lambs (BW = 37.4 ± 4.9 kg) using a 4 × 4 Latin square design to assess the effect of increasing levels (0, 15, 30 and 45% DM basis) of foliage of Brosimum alicastrum on a basal ration of M. maximus. Organic matter intake and water consumption increased linearly (p < 0.01) with increasing levels of B. alicastrum in the ration. The rate and potential extent of rumen fermentation of OM and CP of B. alicastrum were 10.6%/h and 86.6% and 11.4%/h and 95.2%, respectively, but no effect (p > 0.05) was found on the potential rumen degradation of DM (40.2%) or on the rate of degradation of DM (0.033%/h) of M. maximus, although a positive effect was found in the rumen degradation rate of NDF (p < 0.05). VFA and ammonia concentration in the rumen and the rate of passage of solids and liquids through the rumen (k1) increased linearly (p < 0.01) with increasing levels of B. alicastrum. Rumen pH was not affected by the incorporation of B. alicastrum (p > 0.05). Microbial nitrogen supply to the small intestine (p < 0.001), apparent digestibility of dry matter (p < 0.01) and NDF (p < 0.05) of the rations were also significantly increased as a result of the incorporation of B. alicastrum foliage. Results from this experiment suggest that the foliage of Brosimum alicastrum can be readily incorporated at around 30% of the ration of dry matter in hair sheep with beneficial effects on feed intake, rate of passage and microbial N supply to the lower tract.

Publisher

MDPI AG

Reference58 articles.

1. National Research Council (NRC) (1975). Underexploited Tropical Plants with Promising Economic Value.

2. Brosimum alicastrum—The riches of Ramon trees in Mexico;Ayala;Agrofor. Today,1997

3. Agriculture in the ancient Maya lowlands (Part 1): Paleoethnobotanical residues and new perspectives on plant management;Dussol;J. Archaeol. Res.,2022

4. Establecimiento y producción temprana de forraje de Ramón (Brosimum alicastrum Swartz) en plantaciones a altas densidades en el norte de Yucatán, México;Ayala;Agrofor. Am.,1995

5. Medina-Figueras, A. (1949). Coeficientes de Digestibilidad del Ramón. [Bachelor’s Thesis, Universidad Nacional Autónoma de México].

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