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Effects of different storage conditions, the farm and the stage of lactation on renneting parameters of goat milk investigated using the Formagraph method

Pazzola, Michele and Balia, Filippo and Dettori, Maria Luisa and Mura, Maria Consuelo and Carcangiu, Vincenzo and Vacca, Giuseppe Massimo (2011) Effects of different storage conditions, the farm and the stage of lactation on renneting parameters of goat milk investigated using the Formagraph method. Journal of Dairy Research, Vol. 78 (3), p. 343-348. eISSN 1469-7629. Article.

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DOI: 10.1017/S0022029911000343

Abstract

This study evaluated the effect of storage on renneting properties of goat milk investigated using the Formagraph method. Milk samples from 169 goats in three farms (F1, F2 and F3) were analysed during an entire lactation (45, 75, 105, 135 and 165 days in milking DIM), to obtain renneting parameters, both from fresh milk and after storage with Bronopol and freezing at -20 °C and -80 °C. As regards fresh milk, mean values of clotting time were between 12·51 (45 DIM) and 13·29 min (105 DIM and F2), the curd firming time between 1·77 (45 DIM) and 2·15 min (F1) and curd firmness between 42·09 (165 DIM) and 49·55mm (45 DIM). No statistical difference was recorded after storage. After regression analysis, all prediction models showed significance value at P<0·001 with the highest R2 value for clotting time, 0·710 (fresh vs. frozen milk at -20 °C), and the lowest for clot firmness, 0·281 (fresh vs. frozen milk at 80 °C). Results demonstrated that assessment of goat milk coagulation properties using the Formagraph method is also achievable after freezing or Bronopol addition.

Item Type:Article
ID Code:6593
Status:Published
Refereed:Yes
Uncontrolled Keywords:Goat milk, storage, coagulation properties, Formagraph
Subjects:Area 07 - Scienze agrarie e veterinarie > VET/02 Fisiologia veterinaria
Area 07 - Scienze agrarie e veterinarie > AGR/17 Zootecnica generale e miglioramento genetico
Area 07 - Scienze agrarie e veterinarie > AGR/19 Zootecnica speciale
Divisions:001 Università di Sassari > 01 Dipartimenti > Biologia animale
Publisher:Cambridge University Press
eISSN:1469-7629
Copyright Holders:© Proprietors of Journal of Dairy Research 2011
Deposited On:18 Nov 2011 14:02

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