Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation
Knowledge of composition of fat, protein and water in the body is indicative for the determination of effects of changes in nutrition in terms of body reserves. Deuterium oxide dilution technique has been proposed as easy, reliable and non-destructive method of determining body composition using...
| Autores principales: | , , , , , |
|---|---|
| Formato: | Conference Paper |
| Lenguaje: | Inglés |
| Publicado: |
klartext GmbH
2003
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/45977 |
| _version_ | 1855521223570620416 |
|---|---|
| author | Jenet, A. Saurer, M. Fernández Rivera, S. Tegegne, Azage Wettstein, H.R. Kreuzer, M. |
| author_browse | Fernández Rivera, S. Jenet, A. Kreuzer, M. Saurer, M. Tegegne, Azage Wettstein, H.R. |
| author_facet | Jenet, A. Saurer, M. Fernández Rivera, S. Tegegne, Azage Wettstein, H.R. Kreuzer, M. |
| author_sort | Jenet, A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Knowledge of composition of fat, protein and water in the body is indicative for the
determination of effects of changes in nutrition in terms of body reserves. Deuterium
oxide dilution technique has been proposed as easy, reliable and non-destructive method
of determining body composition using the ratios of protein:water and mineral:water to
predict fat.
Twenty
Bos indicus
(Boran) and 21 Boran
×
Holstein have been exposed for 4 years
to calculated energy requirements for maintenance (M) (low) or M
+
20% (medium) and
M
+
40% (high). In the third lactation these treatments were sub-divided into either low
or high feeding level. Before deuterium application animals were weighed and a blood
sample was collected from the jugular vein. Deuterium was slowly administered at 0.3
g/kg fasted body weight, directly into the jugular vein and the syringe was rinsed with
refilled blood. Blood samples were taken at 5, 7, and 9 h post infusion and deuterium
concentrations in plasma were analysed using isotope mass spectroscopy (3960 nm against
water). The gastrointestinal tract (GIT) of the cows was assumed to amount to 0.20 of
body weight (BW), and empty body weight (EBW) was described as EBW = BW
−
GIT.
Body composition was estimated in the following equations:
Empty body water (kg) = 0.4717
×
BW (kg) + 0.1536
×
D
2
O-space (kg) – 25.046
Empty body ash (kg) = 0.0363
×
BW (kg) + 0.0231
×
D
2
O-space (kg) – 5.755
Empty body protein (kg) = 0.1624
×
BW (kg) + 0.0165
×
D
2
O-space (kg) – 11.488
Empty body fat (kg) = 0.3790
×
BW (kg) – 0.2955
×
D
2
O-space (kg) – 42.163
Previous feeding level and the genotype explained most of the differences between treat-
ment groups. Boran cows showed higher levels of fat, but the difference of 20% and 40%
of the previous medium and high treatment was still visible. Fat reserves from the cross-
bred cows were strongly influenced by milk production, however, crossbreds previously on
low plane of nutrition replenished their fat deposits instead of producing more milk when
receiving higher amounts of feed. |
| format | Conference Paper |
| id | CGSpace45977 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2003 |
| publishDateRange | 2003 |
| publishDateSort | 2003 |
| publisher | klartext GmbH |
| publisherStr | klartext GmbH |
| record_format | dspace |
| spelling | CGSpace459772020-08-07T10:14:53Z Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation Jenet, A. Saurer, M. Fernández Rivera, S. Tegegne, Azage Wettstein, H.R. Kreuzer, M. animal feeding livestock animal production cattle Knowledge of composition of fat, protein and water in the body is indicative for the determination of effects of changes in nutrition in terms of body reserves. Deuterium oxide dilution technique has been proposed as easy, reliable and non-destructive method of determining body composition using the ratios of protein:water and mineral:water to predict fat. Twenty Bos indicus (Boran) and 21 Boran × Holstein have been exposed for 4 years to calculated energy requirements for maintenance (M) (low) or M + 20% (medium) and M + 40% (high). In the third lactation these treatments were sub-divided into either low or high feeding level. Before deuterium application animals were weighed and a blood sample was collected from the jugular vein. Deuterium was slowly administered at 0.3 g/kg fasted body weight, directly into the jugular vein and the syringe was rinsed with refilled blood. Blood samples were taken at 5, 7, and 9 h post infusion and deuterium concentrations in plasma were analysed using isotope mass spectroscopy (3960 nm against water). The gastrointestinal tract (GIT) of the cows was assumed to amount to 0.20 of body weight (BW), and empty body weight (EBW) was described as EBW = BW − GIT. Body composition was estimated in the following equations: Empty body water (kg) = 0.4717 × BW (kg) + 0.1536 × D 2 O-space (kg) – 25.046 Empty body ash (kg) = 0.0363 × BW (kg) + 0.0231 × D 2 O-space (kg) – 5.755 Empty body protein (kg) = 0.1624 × BW (kg) + 0.0165 × D 2 O-space (kg) – 11.488 Empty body fat (kg) = 0.3790 × BW (kg) – 0.2955 × D 2 O-space (kg) – 42.163 Previous feeding level and the genotype explained most of the differences between treat- ment groups. Boran cows showed higher levels of fat, but the difference of 20% and 40% of the previous medium and high treatment was still visible. Fat reserves from the cross- bred cows were strongly influenced by milk production, however, crossbreds previously on low plane of nutrition replenished their fat deposits instead of producing more milk when receiving higher amounts of feed. 2003-10-08 2014-10-15T15:35:42Z 2014-10-15T15:35:42Z Conference Paper https://hdl.handle.net/10568/45977 en Limited Access klartext GmbH Jenet A., Saurer, M., Fernandez-Rivera, S., Tegegne, A., Wettstein, H.-R. and Kreuzer, M. 2003. Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation. IN: Wollny, C., Deininger, A., Bhandari, N., Maass, B., Manig, W., Muuss, U., Brodbeck, F. and Howe, I. 2003. Deutscher Tropentag 2003: Technological and institutional innovations for sustainable rural development. Göttingen: klartext GmbH: 153. |
| spellingShingle | animal feeding livestock animal production cattle Jenet, A. Saurer, M. Fernández Rivera, S. Tegegne, Azage Wettstein, H.R. Kreuzer, M. Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation |
| title | Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation |
| title_full | Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation |
| title_fullStr | Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation |
| title_full_unstemmed | Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation |
| title_short | Body composition of cows kept under tropical conditions: Carry-over effects of feed fluctuation |
| title_sort | body composition of cows kept under tropical conditions carry over effects of feed fluctuation |
| topic | animal feeding livestock animal production cattle |
| url | https://hdl.handle.net/10568/45977 |
| work_keys_str_mv | AT jeneta bodycompositionofcowskeptundertropicalconditionscarryovereffectsoffeedfluctuation AT saurerm bodycompositionofcowskeptundertropicalconditionscarryovereffectsoffeedfluctuation AT fernandezriveras bodycompositionofcowskeptundertropicalconditionscarryovereffectsoffeedfluctuation AT tegegneazage bodycompositionofcowskeptundertropicalconditionscarryovereffectsoffeedfluctuation AT wettsteinhr bodycompositionofcowskeptundertropicalconditionscarryovereffectsoffeedfluctuation AT kreuzerm bodycompositionofcowskeptundertropicalconditionscarryovereffectsoffeedfluctuation |