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Energy requirements for maintenance and growth of male saanen goat kids.

Medeiros AN, Resende KT, Teixeira IA, Araújo MJ, Yáñez EA, Ferreira AC - Asian-australas. J. Anim. Sci. (2014)

Bottom Line: Body fat content varied from 59.91 to 92.02 g/kg of EBW while body energy content varied from 6.37 to 7.76 MJ/kg of EBW, respectively, for 5 and 20 kg of EBW.The net energy for growth (NEg) ranged from 7.4 to 9.0 MJ/kg of empty weight gain by day at 5 and 20 kg BW, respectively.This study indicated that the energy requirements in goats were lower than previously published requirements for growing dairy goats.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Science, Universidade Estadual Paulista (UNESP), Jaboticabal, SP14884-900, Brazil .

ABSTRACT
The aim of study was to determine the energy requirements for maintenance and growth of forty-one Saanen, intact male kids with initial body weight (BW) of 5.12±0.19 kg. The baseline (BL) group consisted of eight kids averaging 5.46±0.18 kg BW. An intermediate group consisted of six kids, fed for ad libitum intake, that were slaughtered when they reached an average BW of 12.9±0.29 kg. The remaining kids (n = 27) were randomly allocated into nine slaughter groups (blocks) of three animals distributed among three amounts of dry matter intake (DMI; ad libitum and restricted to 70% or 40% of ad libitum intake). Animals in a group were slaughtered when the ad libitum-treatment kid in the group reached 20 kg BW. In a digestibility trial, 21 kids (same animals of the comparative slaughter) were housed in metabolic cages and used in a completely randomized design to evaluate the energetic value of the diet at different feed intake levels. The net energy for maintenance (NEm) was 417 kJ/kg(0.75) of empty BW (EBW)/d, while the metabolizable energy for maintenance (MEm) was 657 kJ/kg(0.75) of EBW/d. The efficiency of ME use for NE maintenance (km) was 0.64. Body fat content varied from 59.91 to 92.02 g/kg of EBW while body energy content varied from 6.37 to 7.76 MJ/kg of EBW, respectively, for 5 and 20 kg of EBW. The net energy for growth (NEg) ranged from 7.4 to 9.0 MJ/kg of empty weight gain by day at 5 and 20 kg BW, respectively. This study indicated that the energy requirements in goats were lower than previously published requirements for growing dairy goats.

No MeSH data available.


Relationship between the percentage of retained energy deposited as protein (% REp) and the content of retained energy in the empty body weight gain (RE; MJ/kg of empty weight gain, EWG): % REp = 188.50(±19.74)×exp[ 0.1506(±0.01)×RE], R2 = 0.85; p<0.001].
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f1-ajas-27-9-1293: Relationship between the percentage of retained energy deposited as protein (% REp) and the content of retained energy in the empty body weight gain (RE; MJ/kg of empty weight gain, EWG): % REp = 188.50(±19.74)×exp[ 0.1506(±0.01)×RE], R2 = 0.85; p<0.001].

Mentions: Animals fed for ad libitum intake had greater RE (MJ/kg0.75 of EBW) and HP (MJ/kg0.75 of EBW) than those animals in the 70% and 40% feed-intake groups (p<0.001; Table 4). The relationship between the RE in the body of animals and RE predicted by the retention of protein and fat (REp+f) (Eq. 10) showed a high degree of precision and accuracy. This means that the RE in the body of animals can safely be estimated based on the retention of protein and fat. The percentage of RE deposited as protein (% REp) decreased exponentially as the content of RE in the gain (RE, MJ/kg of EWG) increased (Figure 1; Eq. 11, the data referring only to the restriction period).


Energy requirements for maintenance and growth of male saanen goat kids.

Medeiros AN, Resende KT, Teixeira IA, Araújo MJ, Yáñez EA, Ferreira AC - Asian-australas. J. Anim. Sci. (2014)

Relationship between the percentage of retained energy deposited as protein (% REp) and the content of retained energy in the empty body weight gain (RE; MJ/kg of empty weight gain, EWG): % REp = 188.50(±19.74)×exp[ 0.1506(±0.01)×RE], R2 = 0.85; p<0.001].
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150196&req=5

f1-ajas-27-9-1293: Relationship between the percentage of retained energy deposited as protein (% REp) and the content of retained energy in the empty body weight gain (RE; MJ/kg of empty weight gain, EWG): % REp = 188.50(±19.74)×exp[ 0.1506(±0.01)×RE], R2 = 0.85; p<0.001].
Mentions: Animals fed for ad libitum intake had greater RE (MJ/kg0.75 of EBW) and HP (MJ/kg0.75 of EBW) than those animals in the 70% and 40% feed-intake groups (p<0.001; Table 4). The relationship between the RE in the body of animals and RE predicted by the retention of protein and fat (REp+f) (Eq. 10) showed a high degree of precision and accuracy. This means that the RE in the body of animals can safely be estimated based on the retention of protein and fat. The percentage of RE deposited as protein (% REp) decreased exponentially as the content of RE in the gain (RE, MJ/kg of EWG) increased (Figure 1; Eq. 11, the data referring only to the restriction period).

Bottom Line: Body fat content varied from 59.91 to 92.02 g/kg of EBW while body energy content varied from 6.37 to 7.76 MJ/kg of EBW, respectively, for 5 and 20 kg of EBW.The net energy for growth (NEg) ranged from 7.4 to 9.0 MJ/kg of empty weight gain by day at 5 and 20 kg BW, respectively.This study indicated that the energy requirements in goats were lower than previously published requirements for growing dairy goats.

View Article: PubMed Central - PubMed

Affiliation: Department of Animal Science, Universidade Estadual Paulista (UNESP), Jaboticabal, SP14884-900, Brazil .

ABSTRACT
The aim of study was to determine the energy requirements for maintenance and growth of forty-one Saanen, intact male kids with initial body weight (BW) of 5.12±0.19 kg. The baseline (BL) group consisted of eight kids averaging 5.46±0.18 kg BW. An intermediate group consisted of six kids, fed for ad libitum intake, that were slaughtered when they reached an average BW of 12.9±0.29 kg. The remaining kids (n = 27) were randomly allocated into nine slaughter groups (blocks) of three animals distributed among three amounts of dry matter intake (DMI; ad libitum and restricted to 70% or 40% of ad libitum intake). Animals in a group were slaughtered when the ad libitum-treatment kid in the group reached 20 kg BW. In a digestibility trial, 21 kids (same animals of the comparative slaughter) were housed in metabolic cages and used in a completely randomized design to evaluate the energetic value of the diet at different feed intake levels. The net energy for maintenance (NEm) was 417 kJ/kg(0.75) of empty BW (EBW)/d, while the metabolizable energy for maintenance (MEm) was 657 kJ/kg(0.75) of EBW/d. The efficiency of ME use for NE maintenance (km) was 0.64. Body fat content varied from 59.91 to 92.02 g/kg of EBW while body energy content varied from 6.37 to 7.76 MJ/kg of EBW, respectively, for 5 and 20 kg of EBW. The net energy for growth (NEg) ranged from 7.4 to 9.0 MJ/kg of empty weight gain by day at 5 and 20 kg BW, respectively. This study indicated that the energy requirements in goats were lower than previously published requirements for growing dairy goats.

No MeSH data available.