Relationships between milking frequency, lactation persistency and milk yield in Swedish Red heifers and cows milked in a voluntary attendance automatic milking system

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Fältnamn	Indikatorer	Metadata
000		03024naa a2200301 4500
001		oai:slubar.slu.se:44140
003		SwePub
008		240410s2011 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://res.slu.se/id/publ/441402 URI
024	7	a https://doi.org/10.1017/S00220299110004712 DOI
040		a (SwePub)slu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Pettersson, Gunnaru Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens utfodring och vård (HUV),Department of Animal Nutrition and Management4 aut0 (Swepub:slu)48404
245	1 0	a Relationships between milking frequency, lactation persistency and milk yield in Swedish Red heifers and cows milked in a voluntary attendance automatic milking system
264	1	c 2011
264	1	b Cambridge University Press (CUP): STM Journals - No Cambridge Open,c 2024
520		a A large dataset comprising output from an automatic milking (AM) system between 1999 and 2006 was examined and a total of 172 cow lactation curves and 68 heifer lactation curves were identified for further analysis. Relationships between milking frequency at different stages of lactation and lactation persistency and total lactation yield were determined. Cows had higher peak and total milk yields than heifers, but heifers had higher persistency (defined as the rate of decline in milk yield between days 100 and 300 post calving). Milking frequency did not differ significantly between cows and heifers in early lactation, but thereafter decreased significantly more in cows than in heifers. The effect of milking frequency on yield characteristics was analysed by comparing the highest and lowest quartiles for milking frequency. High milking frequency in early lactation was consistently associated with increased peak yield. High milking frequency averaged across the whole lactation was associated with increased peak yield in both cows and heifers, and with improved lactation persistency in cows only. This resulted in total lactation yield that was 21% greater in the high quartile cows compared with the low.
650	7	a LANTBRUKSVETENSKAPERx Lantbruksvetenskap, skogsbruk och fiskex Jordbruksvetenskap0 (SwePub)401012 hsv//swe
650	7	a AGRICULTURAL SCIENCESx Agriculture, Forestry and Fisheriesx Agricultural Science0 (SwePub)401012 hsv//eng
700	1	a Svennersten Sjaunja, Kerstinu Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens utfodring och vård (HUV),Department of Animal Nutrition and Management4 aut0 (Swepub:slu)48943
710	2	a Sveriges lantbruksuniversitetb Institutionen för husdjurens utfodring och vård (HUV)4 org
710	2	a Sveriges lantbruksuniversitet
773	0	t Journal of Dairy Researchg 78, s. 379-384q 78<379-384x 0022-0299x 1469-7629
856	4 8	u https://res.slu.se/id/publ/44140
856	4 8	u https://doi.org/10.1017/S0022029911000471

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