Metabolizable Protein: 2. Requirements for Maintenance in Growing Saanen Goats

Simple item page
dc.citation.volume8
dc.contributor.authorSouza AP
dc.contributor.authorVargas JAC
dc.contributor.authorFernandes MHMR
dc.contributor.authorAlmeida AK
dc.contributor.authorResende KT
dc.contributor.authorTeixeira IAMA
dc.contributor.editorRotta PP
dc.date.accessioned2024-10-01T20:51:20Z
dc.date.available2024-10-01T20:51:20Z
dc.date.issued2021-06-07
dc.description.abstractThis study aimed to estimate the protein requirements for the maintenance of growing Saanen goats of different sexes from 5 to 45 kg of body weight (BW) using two methods and applying a meta-analysis. For this purpose, two datasets were used. One dataset was used to evaluate the effects of sex on the protein requirements for maintenance using the comparative slaughter technique. This dataset was composed of 185 individual records (80 intact males, 62 castrated males, and 43 females) from six studies. The other dataset was used to evaluate the effects of sex on the protein requirements for maintenance using the N balance method. This dataset was composed of 136 individual records (59 intact males, 43 castrated males, and 34 females) from six studies. All studies applied an experimental design that provided different levels of N intake and different levels of N retention, allowing the development of regression equations to predict the net protein requirement for maintenance (NPM) and the metabolizable protein (MP) requirements for maintenance (MPM) in Saanen goats. The efficiency of MP use for maintenance (kPM) was computed as NPM/MPM. The efficiency of MP use for gain (kPG) was calculated using the equation of daily protein retained against daily MP intake above maintenance. A meta-analysis was applied using the MIXED procedure of SAS, in which sex was considered a fixed effect, and blocks nested in the studies and goat sex were considered as random effects. The NPM did not differ between sexes, irrespective of the approach used. The daily NPM estimated was 1.23 g/kg0.75 BW when using the comparative slaughter technique, while it was 3.18 g/kg0.75 BW when using the N balance technique for growing Saanen goats. The MPM estimated was 3.8 g/kg0.75 BW, the kPM was 0.33, and the kPG was 0.52. We observed that the NPM when using the comparative slaughter technique in growing Saanen goats is lower than that recommended by the current small ruminant feeding systems; on the other hand, the MPM was similar to previous reports by the feeding systems. Sex did not affect the protein requirements for maintenance and the efficiencies of use of metabolizable protein.
dc.description.confidentialfalse
dc.identifier.citationSouza AP, Vargas JAC, Fernandes MHMR, Almeida AK, Resende KT, Teixeira IAMA. (2021). Metabolizable Protein: 2. Requirements for Maintenance in Growing Saanen Goats. Frontiers in Veterinary Science. 8.
dc.identifier.doi10.3389/fvets.2021.650203
dc.identifier.eissn2297-1769
dc.identifier.elements-typejournal-article
dc.identifier.number650203
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71547
dc.languageEnglish
dc.publisherFrontiers Media S.A.
dc.publisher.urihttps://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2021.650203/full
dc.relation.isPartOfFrontiers in Veterinary Science
dc.rights(c) 2021 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectcomparative slaughter
dc.subjectmetabolism
dc.subjectN balance
dc.subjectruminant
dc.subjectsex
dc.subjectefficiency of use
dc.subjectdairy goat
dc.titleMetabolizable Protein: 2. Requirements for Maintenance in Growing Saanen Goats
dc.typeJournal article
pubs.elements-id479083
pubs.organisational-groupOther
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Published version.pdf
Size:
798.33 KB
Format:
Adobe Portable Document Format
Description:
479083 PDF.pdf
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
9.22 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles