Figueiredo, F O M; Leite, R F; St-Pierre, N R; Resende, K T; Almeida, A K; Souza, A P; Teixeira, I A M A

Author(s)

Figueiredo, F O M

Leite, R F

St-Pierre, N R

Resende, K T

Almeida, A K

Souza, A P

Teixeira, I A M A

Publication Date

2017-10

Abstract

The objective of this research was to estimate the energy and protein requirements for maintenance and growth in male (castrated and intact) and female Saanen goat kids between 15 and 30 kg BW. To determine the net energy requirements for maintenance (NEm) and the net protein requirements for maintenance (NPm), 75 goats (25 castrated and 26 intact males and 24 females) were used. Twenty‐one goats (seven castrated and eight intact males and six females) were randomly assigned for slaughter to estimate the initial empty body composition. The 54 remaining animals (18 castrated and 18 intact males and 18 females) were randomly assigned in a split‐plot design using a 3 × 3 factorial arrangement with three sexes and three levels of intake (ad libitum and restricted feed to 75% or 50% of the ad libitum intake). Within each sex, six blocks (three goats per block) were formed and one goat was randomly assigned to each level of intake. The 75% and the 50% of ad libitum rationing were determined daily, based on the DMI of the animal fed ad libitum on the previous day. All animals within block were slaughtered when the animal fed ad libitum reached 30 kg BW. The net energy requirements for gain (NEg) and the net protein requirements for gain (NPg) were obtained using 58 animals (20 castrated and 20 intact males and 18 females). The animals were fed ad libitum and slaughtered at targeted BW (15, 23 or 30 kg). Sex did not affect NEg and NPm (277.8 kJ/kg0.75 BW day and 2.98 g CP/kg0.75 BW day respectively), as well as NPg (180.9 ± 6.48 g/kg EBW gain) in Saanen goat kids. However, castrated males and females had similar NEg (varied from 12.6 ± 0.424 to 17.9 ± 1.38 MJ/kg EBW gain), greater than intact males (varied from 9.74 ± 0.420 to 10.7 ± 0.984 MJ/kg EBW gain), as the BW increased from 15 to 30 kg.

Citation

Journal of Animal Physiology and Animal Nutrition, 101(5), p. 1014-1025

ISSN

1439-0396

0931-2439

Pubmed ID

27435154

Link

https://hdl.handle.net/1959.11/29280

Publisher

Wiley-Blackwell Verlag GmbH

Title

Energy and protein requirements of weaned male and female Saanen goats

Type of document

Journal Article

Entity Type

Publication

Author(s)	Figueiredo, F O M Leite, R F St-Pierre, N R Resende, K T Almeida, A K Souza, A P Teixeira, I A M A
Publication Date	2017-10
Abstract	The objective of this research was to estimate the energy and protein requirements for maintenance and growth in male (castrated and intact) and female Saanen goat kids between 15 and 30 kg BW. To determine the net energy requirements for maintenance (NE<sub>m</sub>) and the net protein requirements for maintenance (NP<sub>m</sub>), 75 goats (25 castrated and 26 intact males and 24 females) were used. Twenty‐one goats (seven castrated and eight intact males and six females) were randomly assigned for slaughter to estimate the initial empty body composition. The 54 remaining animals (18 castrated and 18 intact males and 18 females) were randomly assigned in a split‐plot design using a 3 × 3 factorial arrangement with three sexes and three levels of intake (<i>ad libitum</i> and restricted feed to 75% or 50% of the <i>ad libitum</i> intake). Within each sex, six blocks (three goats per block) were formed and one goat was randomly assigned to each level of intake. The 75% and the 50% of <i>ad libitum</i> rationing were determined daily, based on the DMI of the animal fed <i>ad libitum</i> on the previous day. All animals within block were slaughtered when the animal fed <i>ad libitum</i> reached 30 kg BW. The net energy requirements for gain (NE<sub>g</sub>) and the net protein requirements for gain (NP<sub>g</sub>) were obtained using 58 animals (20 castrated and 20 intact males and 18 females). The animals were fed <i>ad libitum</i> and slaughtered at targeted BW (15, 23 or 30 kg). Sex did not affect NE<sub>g</sub> and NP<sub>m</sub> (277.8 kJ/kg<sup>0.75</sup> BW day and 2.98 g CP/kg0.75 BW day respectively), as well as NP<sub>g</sub> (180.9 ± 6.48 g/kg EBW gain) in Saanen goat kids. However, castrated males and females had similar NE<sub>g</sub> (varied from 12.6 ± 0.424 to 17.9 ± 1.38 MJ/kg EBW gain), greater than intact males (varied from 9.74 ± 0.420 to 10.7 ± 0.984 MJ/kg EBW gain), as the BW increased from 15 to 30 kg.
Citation	Journal of Animal Physiology and Animal Nutrition, 101(5), p. 1014-1025
ISSN	1439-0396 0931-2439
Pubmed ID	27435154
Link	https://hdl.handle.net/1959.11/29280
Publisher	Wiley-Blackwell Verlag GmbH
Title	Energy and protein requirements of weaned male and female Saanen goats
Type of document	Journal Article
Entity Type	Publication

Energy and protein requirements of weaned male and female Saanen goats

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