Prediction of bovine milk true protein content by mid-infrared spectroscopy

Autor(es)

Botaro, Bruno Garcia ^[1] ; Cortinhas, Cristina Simoes ^[2] ; Mestieri, Lucineia ^[2] ; Machado, Paulo Fernando ^[3] ; dos Santos, Marcos Veiga ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, FMVZ, Dept Vet Prevent Med, BR-09500900 Sao Paulo - Brazil

^[2] USP, FMVZ, Dept Nutr & Prod Anim, BR-13635900 Pirassununga, SP - Brazil

^[3] USP, Dept Zootecnia, Escola Super Agr Luiz de Queiroz ESALQ, Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Ciência Rural; v. 41, n. 8, p. 1472-1474, AUG 2011.
• Citações Web of Science: 4

Resumo

The aim of this study was to estimate the concentration of milk true protein (TP) by mid-infrared absorbance method (MIR) in samples from bulk tank of dairy herds, and to determine the correlation between the results of TP of milk determined by Kjeldahl and MIR. Forty nine dairy herds were selected (17 Holstein, 6 Jersey and 26 Girolando) for monthly collections of samples from bulk tanks during the period of one year (284 samples). Fat, lactose, crude protein and total solids were firstly determined by MIR, and then analyzed for total and true protein by Kjeldahl method. The regression equation to estimate TP contents based on MIR crude protein determination was as follows: TP=0.0021+(1.0104xCP), where: TP is the content of true protein, CP is the crude protein content determined by the MIR method, and 0.0155 is the model error term. (AU)

• Processo FAPESP: 05/54748-0 - Variabilidade de frações protéicas do leite em rebanhos leiteiros do estado de São Paulo
• Beneficiário: Marcos Veiga dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Regular