Reproductive Response of Ewes Fed with Taiwan Grass Hay (Pennisetum purpureum Schum.) Supplemented with Duckweed (Lemna sp. and Spirodela sp.)

Autor: María Esther Ortega-Cerrilla, Juan Lorenzo Reta-Mendiola, Eusebio Ortega-Jiménez, José G. Herrera-Haro, M. T. Sánchez Torres-Esqueda, Pedro Zetina-Córdoba, Julio Vilaboa-Arroniz
Jazyk: angličtina
Rok vydání: 2012
Předmět:
Zdroj: Asian-Australasian Journal of Animal Sciences
ISSN: 1976-5517
1011-2367
Popis: The effect of duckweed (DW) supplementation was evaluated on dry matter intake (DMI), presence and duration of estrus, percentage of ewes repeating estrus and pregnancy rate, as well as the concentration of progesterone (P4) in multiparous crossbred ewes from Pelibuey, Dorper, and Katahdin breeds, fed with Taiwan grass hay (TWH). Eighteen ewes with 39.74 kg mean body weight, kept in individual pens, were randomly assigned to one of the following treatments: T1: TWH, T2: TWH plus 200 g DW, T3: TWH plus 300 g DW. The ewes were synchronized with 40 mg fluorogestone acetate (FGA) and 400 UI equine chorionic gonadotropin (eCG). Data were analyzed as a completely randomized design using the GLM procedure. DW supplementation had no effect on dry matter intake (p>0.05); however, a slight decrease of TWH intake was observed as DW supplementation increased. No differences (p>0.05) were found in the beginning of estrus, percentage of ewes presenting it, its duration, or pregnancy rate. There were no differences (p>0.05) on P4 concentration among treatments, or treatmentperiod interaction (p>0.05). However the period was significant (p
Databáze: OpenAIRE
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