Impacts of rumen fluid modified by feeding Yucca schidigera to lactating dairy cows on in vitro gas production of 11 common dairy feedstuffs, as well as animal performance

The objective was to determine effects of feeding increasing levels of a Yucca schidigera extract (YSE) to dairy cows on 24 h in vitro gas production and 27 h in vitro neutral detergent fibre (aNDFom) digestion of 11 common dairy feedstuffs, as well as in vivo rumen fermentation and performance of t...

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Bibliographic Details
Published in:Animal feed science and technology 2008-10, Vol.146 (3), p.242-258
Main Authors: Singer, M.D., Robinson, P.H., Salem, A.Z.M., DePeters, E.J.
Format: Article
Language:English
Subjects:
Ammonia
Animal productions
Biological and medical sciences
Feed and pet food industries
Fermentation
Food industries
Fundamental and applied biological sciences. Psychology
Hordeum vulgare
Prunus dulcis
Sarsaponin
Terrestrial animal productions
Vertebrates
Volatile fatty acids
Yucca schidigera
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Summary:The objective was to determine effects of feeding increasing levels of a Yucca schidigera extract (YSE) to dairy cows on 24 h in vitro gas production and 27 h in vitro neutral detergent fibre (aNDFom) digestion of 11 common dairy feedstuffs, as well as in vivo rumen fermentation and performance of the cows to which the YSE was fed. The principle was to use YSE to potentially modify the rumen microbial population in vivo and measure subsequent impacts of the adapted rumen fluid on feedstuff fermentation in vitro. Four rumen cannulated late lactation Holstein cows (810 ± 54.7 kg body weight) were used in a 4×4 Latin Square design experiment with 14 d periods. Cows were housed in pens with individual feeding gates and had ad libitum access to water while fed a total mixed ration (TMR) of alfalfa hay, corn grain, barley grain, dried distillers grains, whole cottonseed, beet pulp, soybean meal, almond hulls, rumen inert fat and a mineral/salt mixture. Based upon sarsaponin assay of four commercial YSE products, Monterey Sarsaponin 15 ® was selected and added to the TMR to provide 0, 5, 10 or 15 g of sarsaponin/cow/d. Rumen fluid from each cow in each period was utilized for in vitro gas determinations to measure gas production and aNDFom digestion from the test feeds. There was a strong linear effect (P=0.002), at an increasing rate (quadratic P=0.08), to increased extent of gas production with increased feeding of YSE. There was a quadratic effect to maximum rate of gas production (P=0.01) at the 5 g sarsaponin level. At 4 h of fermentation, gas production increased linearly (P
ISSN:0377-8401
1873-2216
DOI:10.1016/j.anifeedsci.2007.12.010