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Longevity and milk production efficiency of Latvian local breeds during last decades

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dc.contributor.authorJonkus, D.
dc.contributor.authorPaura, L.
dc.contributor.authorCielava, L.
dc.date.accessioned2020-04-28T19:29:10Z
dc.date.available2020-04-28T19:29:10Z
dc.date.issued2020
dc.description.abstractThe aim of the study was to analyse the longevity and the amount of energy-corrected milk (ECM) per day of local dairy cattle breeds Latvian Brown (LB) and Latvian Blue (LZ). The study was based on the data of LB genetic resources (LB) 1770 and LZ 921 cows, which were born from January 1st, 2000 till December 31st year 2015. Milk productivity and longevity of the LB and LZ cows were analysed by birth year periods: 2000–2005, 2006–2010 and 2011–2015. LZ culled cows lifespan was in average 2,762.8 ± 55.14 days, or 7.6 years and it was significantly higher than for LB. The average lifespan of LB culling cows was 6.7 years. There are cows which had closed 7–12 lactations. On average, cows’ lifespan decreased during analysed period. In general, LZ cows are characterized by higher length of productive life and milking days. LZ cows produced more EC milk during their productive life; however, they had the lower milking day ECM productivity than LB cows.eng
dc.identifier.issn1406-894X
dc.identifier.publicationAgronomy Research, 2020, vol. 18, Special Issue 2, pp. 1316–1322eng
dc.identifier.urihttp://hdl.handle.net/10492/5675
dc.identifier.urihttps://doi.org/10.15159/ar.20.064
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) ; openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectlocal breedeng
dc.subjectlongevityeng
dc.subjectmilk production efficiencyeng
dc.subjectarticleseng
dc.titleLongevity and milk production efficiency of Latvian local breeds during last decadeseng
dc.typeArticleeng

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2020, Vol. 18, Special Issue 2