Gulati, Arunima and Galvin, Norann and Hennessy, Deirdre and McAuliffe, Stephen and O'Donovan, Michael and McManus, Jennifer and Fenelon, Mark and Guinee, Timothy P. (2018) Grazing of dairy cows on pasture versus indoor feeding on total mixed ration: Effects on low-moisture part-skim Mozzarella cheese yield and quality characteristics in mid and late lactation. Journal of Dairy Science, 101 (10). pp. 8737-8756. ISSN 1525-3198

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Abstract

This study investigated the effects of 3 dairy cow feeding systems on the composition, yield, and biochemical and physical properties of low-moisture part-skim Mozzarella cheese in mid (ML; May–June) and late (LL; October–November) lactation. Sixty spring-calving cows were assigned to 3 herds, each consisting of 20 cows, and balanced on parity, calving date, and pre-experimental milk yield and milk solids yield. Each herd was allocated to 1 of the following feeding systems: grazing on perennial ryegrass (Lolium perenne L.) pasture (GRO), grazing on perennial ryegrass and white clover (Trifolium repens L.) pasture (GRC), or housed indoors and offered total mixed ration (TMR). Mozzarella cheese was manufactured on 3 separate occasions in ML and 4 in LL in 2016. Feeding system had significant effects on milk composition, cheese yield, the elemental composition of cheese, cheese color (green to red and blue to yellow color coordinates), the extent of flow on heating, and the fluidity of the melted cheese. Compared with TMR milk, GRO and GRC milks had higher concentrations of protein and casein and lower concentrations of I, Cu, and Se, higher cheese-yielding capacity, and produced cheese with lower concentrations of the trace elements I, Cu, and Se and higher yellowness value. Cheese from GRO milk had higher heat-induced flow and fluidity than cheese from TMR milk. These effects were observed over the entire lactation period (ML + LL), but varied somewhat in ML and LL. Feeding system had little, or no, effect on gross composition of the cheese, the proportions of milk protein or fat lost to cheese whey, the texture of the unheated cheese, or the energy required to extend the molten cheese. The differences in color and melt characteristics of cheeses obtained from milks with the different feeding systems may provide a basis for creating points of differentiation suited to different markets.

Item Type:	Article
Additional Information:	Cite as: Gulati, A., Galvin, N., Hennessy, D., McAuliffe, S., O'Donovan, M., McManus, J., Fenelon, M. A. Guinee, T. P. (2018). Grazing of dairy cows on pasture versus indoor feeding on total mixed ration: Effects on low-moisture part-skim Mozzarella cheese yield and quality characteristics in mid and late lactation. Journal of Dairy Science, 101(10), 8737-8756. doi: 10.3168/jds.2018-14566
Keywords:	pasture; total mixed ration; milk; Mozzarella;
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	10770
Identification Number:	https://doi.org/10.3168/jds.2018-14566
Depositing User:	Jennifer McManus
Date Deposited:	03 May 2019 16:50
Journal or Publication Title:	Journal of Dairy Science
Publisher:	American Dairy Science Association
Refereed:	Yes
Funders:	Department of Agriculture, Food and the Marine, Dairy Levy Trust Co-Operative Society Limited
URI:	https://www.sciencedirect.com
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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