Título

Influence of Salix babylonica and Leucaena leucocephala leaf extracts on ruminal fermentation characteristics, urinary purine derivative excretion and microbial protein synthesis of lambs

Autor

PABLO MEJIA HERNANDEZ

Abdelfattah Zeidan Mohamed Salem

SECUNDINO LOPEZ PUENTE

Xuezhao Sun

ROLANDO ROJO RUBIO

LUIS MIGUEL CAMACHO DIAZ

MONA MOHAMED MOHAMED YASSEEN ELGHANDOUR

Manuel González Ronquillo

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

Plant extracts - ([1871-1413]) Rumen fermentation - ([1871-1413]) Purine derivatives - ([1871-1413]) Protozoa counts - ([1871-1413]) Lambs - ([1871-1413]) CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA - (CTI)

Resumen o descripción

Extract of L. leucocephala or S. babylonica leaves was prepared as described before in Salem et al. (2011a). Briefly, leaves of each tree species were collected randomly from several young and mature trees during summer. Leaves (1.25 kg) were fresh chopped into 1 to 2 cm lengths and immediately extracted in 10 l of a solvent mixture containing 1 l of methanol, 1 l of ethanol and 8 l of distilled water. Extraction was at 25–301 C for 48–72 h in 20 l closed jars, followed by incubation at 391 C for 1 h, and then filtered. Filtrates were collected and stored at 41 C for further use. Plant extracts were weekly prepared. The 1:1 mixture extract was also prepared weekly by mixing the SB and LL extracts (0.5:0.5, vol:vol).

Sixteen growing Katahdin Pelibuey lambs (2470.3 kg body weight) were used to study the effects of oral administration of extracts of Salix babylonica (SB) and Leucaena leucocephala (LL) leaves on ruminal pH, total and individual volatile fatty acids (VFA) and NH3-N concentrations, as well as ruminal protozoal counts, urinary purine derivatives (PD) excretion and estimated microbial protein synthesis. Lambs were fed a total mixed ration (TMR) containing 219 and 141 g kg 1 of CP and NDF, respectively. Four treatments (4 lambs/treatment) were Control (no extract added), SB (SB extract at 30 ml d 1), LL (LL extract at 30 ml d 1) and SBLL (mixture of SB at 15 ml d 1þLL at 15 ml d 1). Extracts were administered orally to each lamb before the morning meal daily. Measurements were on days 22 (P1), 43 (P2) and 63 (P3) of the experiment. Ruminal pH increased (P¼0.014) with SBLL extract and decreased with SB. The ratio of acetate to propionate was higher (P¼0.042) with SBLL compared to the control. Ruminal NH3-N concentration was not affected by extract administration (P¼0.309) or experimental period (P¼0.087). Protozoal counts were not affected (P¼0.489) by extract addition but decreased (Po0.001) in P3 compared with P1 and P2. Uric acid concentration increased (Po0.001) with individual extracts of SB and LL compared with the control or SBLL. Excretion of other purine derivatives (allantoin, xanthine, and hypoxanthine), creatinine and microbial protein synthesis were not changed (P40.05) by extracts administration. Overall, oral administration of S. babylonica and L. leucocephala extracts, or their 1:1 mixture, to lambs for 63 d had only minor effects on ruminal fermentation, urinary purine derivative excretion and microbial protein synthesis.

Editor

ELSEVIER

Fecha de publicación

29 de enero de 2014

Tipo de publicación

Artículo

Recurso de información

http://hdl.handle.net/20.500.11799/66054

Fuente

1871-1413

Idioma

Inglés

Relación

Vol.;163

Audiencia

Estudiantes

Investigadores

Repositorio Orígen

REPOSITORIO INSTITUCIONAL DE LA UAEM

Descargas

268