Milk yield, milk composition, eating behavior, and lamb performance of ewes fed diets containing soybean hulls replacing coastcross (Cynodon species) hay

Journal of Animal Science
R C AraujoM L Eastridge

Abstract

The objective of this experiment was to evaluate the effects of replacing coastcross hay NDF by soybean hull (SH) NDF on the lactation performance and eating behavior of ewes and also on the performance of their lambs. Fifty-six Santa Inês lactating ewes (56.1 +/- 6.8 kg of initial BW; mean +/- SD) were penned individually and used in a randomized complete block design with 14 blocks and 4 treatments. Diets were formulated to provide similar concentrations of NDF (56%) and CP (16%). The SH NDF replaced 33 (SH33), 67 (SH67), or 100% (SH100) of the NDF contributed by coastcross hay in a 70% forage-based diet (SH0), resulting in SH inclusion rates of 0, 25, 54, and 85% of the dietary DM. Once a week, from the second to the eighth week of lactation (weaning time), ewes were separated from their lambs, stimulated by a 6-IU i.v. oxytocin injection, and hand milked to empty the udder. After 3 h, milk production was obtained after the same procedure. Quadratic effect for milk production (142.4, 179.8, 212.6, and 202.9 g/3 h) and cubic effect for DMI (2.27, 2.69, 3.25, and 3.00 kg/d) were observed as SH inclusion increased from 0 to 85% of the dietary DM. Milk fat (7.59, 7.86, 7.59, and 7.74%), protein (4.53, 4.43, 4.40, and 4.55%), and...Continue Reading

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Citations

May 12, 2012·Tropical Animal Health and Production·Daiany Iris GomesSandra de Sousa Barcelos
Dec 1, 2010·Animal : an International Journal of Animal Bioscience·L VilleneuveP Lacasse
Sep 5, 2009·Tropical Animal Health and Production·A O A SantosR de Andrade
Oct 29, 2017·Tropical Animal Health and Production·Carlos Burgos-GonzálezMariana Pedernera
Jul 24, 2021·Animal : an International Journal of Animal Bioscience·J SimõesP Chemineau

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