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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.


Related in: MedlinePlus

Relationship between the logarithm of heat production (HP) and the ME intake (MEI; kJ/kg0.75 of empty BW) for Saanen intact male kids. Log10 HP = 2.62(±0.014)+0.0003±(0.00001)×MEI; R2 = 0.97, RMSE = 0.0152, p<0.0001. BW, body weight; ME, metabolizable energy; RMSE, root mean square error.
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f2-ajas-27-9-1293: Relationship between the logarithm of heat production (HP) and the ME intake (MEI; kJ/kg0.75 of empty BW) for Saanen intact male kids. Log10 HP = 2.62(±0.014)+0.0003±(0.00001)×MEI; R2 = 0.97, RMSE = 0.0152, p<0.0001. BW, body weight; ME, metabolizable energy; RMSE, root mean square error.

Mentions: The relationship between HP and MEI is shown in Figure 2. In the present study, the NEm was obtained through regression between the log of HP (kJ/kg0.75 of EBW) and MEI (kJ/kg0.75 of EBW) for growing Saanen goats (Eq. 12). The NEm of Saanen kids (from 5 to 20 kg BW) was 417 kJ/kg0.75 of EBW (357 kJ/kg0.75 of BW), while the MEm that was calculated by iteration assuming HP to be equal to MEI at maintenance was 657 kJ/kg0.75 of EBW (562 kJ/kg0.75 of BW). The partial efficiency of ME used for NEm (km) found in this study through the NEm/MEm ratio was 0.64.


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 logarithm of heat production (HP) and the ME intake (MEI; kJ/kg0.75 of empty BW) for Saanen intact male kids. Log10 HP = 2.62(±0.014)+0.0003±(0.00001)×MEI; R2 = 0.97, RMSE = 0.0152, p<0.0001. BW, body weight; ME, metabolizable energy; RMSE, root mean square error.
© Copyright Policy
Related In: Results  -  Collection

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

f2-ajas-27-9-1293: Relationship between the logarithm of heat production (HP) and the ME intake (MEI; kJ/kg0.75 of empty BW) for Saanen intact male kids. Log10 HP = 2.62(±0.014)+0.0003±(0.00001)×MEI; R2 = 0.97, RMSE = 0.0152, p<0.0001. BW, body weight; ME, metabolizable energy; RMSE, root mean square error.
Mentions: The relationship between HP and MEI is shown in Figure 2. In the present study, the NEm was obtained through regression between the log of HP (kJ/kg0.75 of EBW) and MEI (kJ/kg0.75 of EBW) for growing Saanen goats (Eq. 12). The NEm of Saanen kids (from 5 to 20 kg BW) was 417 kJ/kg0.75 of EBW (357 kJ/kg0.75 of BW), while the MEm that was calculated by iteration assuming HP to be equal to MEI at maintenance was 657 kJ/kg0.75 of EBW (562 kJ/kg0.75 of BW). The partial efficiency of ME used for NEm (km) found in this study through the NEm/MEm ratio was 0.64.

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.


Related in: MedlinePlus