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Browsing IBERS Research papers by Author "Cabrita, A. R. J."

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Effects of dietary protein concentration and balance of absorbable amino acids on productive responses of dairy cows fed corn silage-based diets

Cabrita, A. R. J.; Dewhurst, Richard J.; Melo, D. S. P.; Moorby, J. M.; Fonseca, A. J. M. (2011-09)

A cyclical changeover design experiment (3-wk periods; 12-wk total) was conducted to evaluate whether improving the balance of absorbable AA would allow the feeding of less crude protein (CP) without compromising production, ...
Effects of dietary protein concentration and balance of absorbable amino acids on productive responses of dairy cows fed corn silage-based diets

Cabrita, A. R. J.; Dewhurst, Richard J.; Melo, D. S. P.; Moorby, J. M.; Fonseca, A. J. M. (2011-09)

A cyclical changeover design experiment (3-wk periods; 12-wk total) was conducted to evaluate whether improving the balance of absorbable AA would allow the feeding of less crude protein (CP) without compromising production, ...
Effects of dietary sulphur sources on concentrations of hydrogen sulphide in the rumen head-space gas of dairy cows

Cabrita, A. R. J.; Evans, Richard T.; Dewhurst, Richard J.; Kim, Eun J.; Fonseca, A. J. M. (2007-02)

Three change-over design experiments investigated the origin of hydrogen sulphide in the rumen head-space gas of dairy cows, comparing the effects of single iso-S additions of methionine, cysteine and sodium sulphate, as ...
Evaluation of palm kernel meal and corn distillers grains in corn silage-based diets for lactating dairy cows

Carvalho, L. F. P. F.; Lopes, Z. M. C.; Cabrita, A. R. J.; Vincente, T. E. J.; Fonseca, A. J. M.; Dewhurst, Richard J. (2006)

The effects of increasing levels of solvent-extracted palm kernel meal (SPKM) and corn distillers dried grains (CDG) in corn silage-based diets on feed intake and milk production were examined in 2 experiments. In Experiment ...
Evaluation of the effects of synchronising the availability of N and energy on rumen function and production responses of dairy cows - a review

Cabrita, A. R. J.; Fonseca, A. J. M.; Dewhurst, Richard J.; Abreu, Josi M. (2006-02-01)

This paper reviews the effects of synchronising the availability of N and energy on rumen function and production responses of lactating dairy cows. The paper makes a key distinction between altering the synchronicity of ...
Milk production of dairy cows given diets with increasing amounts of solvent extracted palm kernel meal

Lopes, Z.; Fonseca, A. J. M.; Dewhurst, Richard J.; Miranda, M. F.; Cabrita, A. R. J.; Carvalho, L. F. P. F. (2003)

This Book of Abstracts is the main publication of the 54th Annual Meeting of the European Association for Animal Production (EAAP) held in Rome, Italy, on 31 August - 3 September 2003. It contains abstracts of the invited ...
Nitrogen supplementation of corn silages. 1. Effects on feed intake and milk production of dairy cows.

Fonseca, A. J. M.; Cabrita, A. R. J.; Miranda, I. N. F.; Sampaio, C. U. P.; Gomes, E.; Sousa, G. N. S.; Miranda, M. F. S.; Dewhurst, Richard J. (2003-12)

Feed intake and milk production responses to N supplementation of corn silage-based diets were measured in three 3 × 3 Latin square experiments. In each experiment, 9 Holstein cows received total mixed rations (TMR), based ...
Nitrogen supplementation of corn silages. 2. Assessing rumen function using fatty acid profiles of bovine milk.

Cabrita, A. R. J.; Dewhurst, Richard J.; Fonseca, A. J. M.; Gomes, E. (2003)

The effects of N supplementation strategies on milk fatty acid profiles of dairy cows and their use as a noninvasive technique to diagnose rumen function, and to guide protein feeding decisions on-farm were evaluated in ...
Use of odd and branched chain fatty acids in rumen contents and milk as a potential microbial marker

Dufour, C.; Dewhurst, Richard J.; van Vuuren, A. M.; Vlaeminck, B.; Cabrita, A. R. J.; Demeyer, D.; Fievez, V. (2005-03)

The objectives of this study were: 1) to determine if a correlation exists between rumen odd and branched-chain fatty acids (OBCFA, i.e., C15:0, iso C15:0, anteiso C15:0, C17:0, iso C17:0, anteiso C17:0, and C17:1), uracil, ...

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