Available online 6 July 2016
Highlights
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- A product based on cinnamaldehyde and garlic oil (NE300) was tested in vitro and in dairy cows.
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- NE300 modified ruminal fermentation resulting in a reduction in methane production and a reduction in acetate molar proportions in vitro.
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- In vivo, NE300 tended to cause total rumen volatile concentrations to increase.
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- NE300 increased milk yield in multiparous cows after 2 weeks of supplementation
Abstract
Two experiments were conducted to study the effects of Next Enhance®
300 (NE300; cinnamaldehyde and garlic oil encapsulated product) on
rumen fermentation and milk production of dairy cows. In experiment 1,
batch cultures of mixed rumen micro-organisms were used to study the
effects of increasing concentrations of NE300 (0, 200, 300, and
400 mg/L) on ruminal fermentation in 24 h in vitro incubations.
All tested doses decreased (P < 0.05) methane production, but the
dose of 400 mg/L also reduced the production of volatile fatty acid
(VFA). The addition of NE300 at 300 mg/L produced the most beneficial
effects, reducing methane production, acetate proportion, and ammonia-N
concentration, and increasing propionate proportion compared with CON,
without affecting total VFA production. These results would indicate a
potentially greater supply of energy for the host animal. In experiment
2, sixteen lactating dairy cows (8 rumen-cannulated) participated in a
switch-back design with three 4-wk periods and 2 treatments: control
(CON, unsupplemented) and NE300 (300 mg NE300/cow/d). Milk yield
response was affected by a 3-way interaction among treatment, parity,
and days on treatment; after 15 d on treatment, multiparous cows on
NE300 produced more milk (approximately additional 3 kg/d) than
multiparous cows on CON. Total rumen VFA concentrations tended
(P = 0.06) to be greater in NE300 than in CON when rumen fermentation
kinetics were evaluated at the end of each period (day 28). It is
concluded that NE300 modifies ruminal fermentation resulting in
increased milk yield in multiparous lactating dairy cows after 15 d of
adaptation.
Abbreviations
- ADFom, acid detergent fiber;
- AFOM, amount of organic matter apparently fermented;
- AOAC, Association of Official Analytical Chemists;
- BCRM, batch cultures of mixed ruminal microorganisms;
- BW, body weight;
- CIN, cinnamaldehyde;
- CON, control;
- CP, crude protein;
- DIM, days in milk;
- DM, dry matter;
- DMI, dry matter intake;
- EO, essential oils;
- GAR, garlic oil;
- MUN, milk urea nitrogen;
- aNDFom, neutral detergent fiber;
- NE300, Next Enhance® 300;
- SCC, somatic cell counts;
- SD, standard deviation;
- TMR, total mixed ration;
- VFA, volatile fatty acids
Keywords
- Batch cultures;
- Cinnamaldehyde;
- Dairy cows;
- Essential oils;
- Garlic
© 2016 Published by Elsevier B.V.