| Title: | A new somatic cell count index to more accurately predict milk yield losses |
|---|
| Authors: | ID Jeretina, Janez (Author)
ID Škorjanc, Dejan (Author)
ID Babnik, Drago (Author) |
|---|
| Files: |  Archives_Animal_Breeding_2017_Jeretina,_Skorjanc,_Babnik_A_new_somatic_cell_count_index_to_more_accurately_predict_milk_yield_losses.pdf (317,33 KB)
MD5: FADC1FB51E3477FC69EFFCD5405ED342
PID: 20.500.12556/dkum/b16d2584-fd1f-451f-bd17-ef12a0066806
 https://www.arch-anim-breed.net/60/373/2017/
|
|---|
| Language: | English |
|---|
| Work type: | Scientific work |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: | FKBV - Faculty of Agriculture and Life Sciences
|
|---|
| Abstract: | Intramammary infection and clinical mastitis in dairy cows leads to considerable economic losses for farmers. The somatic cell concentration in cow's milk has been shown to be an excellent indicator for the prevalence of subclinical mastitis. In this study, a new somatic cell count index (SCCI) was proposed for the accurate prediction of milk yield losses caused by elevated somatic cell count (SCC). In all, 97238 lactations (55207 Holstein cows) from 2328 herds were recorded between 2010 and 2014 under different scenarios (high and low levels of SCC, four lactation stages, different milk yield intensities, and parities (1, 2, and _>3). The standard shape of the curve for SCC was determined using completed standard lactations of healthy cows. The SCCI was defined as the sum of the differences between the measured interpolated values of the natural logarithm of SCC (ln(SCC)) and the values for the standard shape of the curve for SCC for a particular period, divided by the total area enclosed by the standard curve and upper limit of ln(SCC)=10 for SCC. The phenotypic potential of milk yield (305-day milk yield - MY305) was calculated using regression coefficients estimated from the linear regression model for parity and breeding values of cows for milk yield. The extent of daily milk yield loss caused by increased SCC was found to be mainly related to the early stage of lactation. Depending on the possible scenarios, the estimated milk yield loss from MY305 for primiparous cows was at least 0.8 to 0.9 kg day -1 and for multiparous cows it ranged from 1.3 to 4.3 kg day-1. Thus, the SCCI was a suitable indicator for estimating daily milk yield losses associated with increased SCC and might provide farmers reliable information to take appropriate measures for ensuring good health of cows and reducing milk yield losses at the herd level. |
|---|
| Keywords: | dairy cows, milk production, lactation intervals, milk yield losses, somatic cell count index |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Year of publishing: | 2017 |
|---|
| Number of pages: | str. 373-383 |
|---|
| Numbering: | Letn. 60, št. 4 |
|---|
| PID: | 20.500.12556/DKUM-68817  |
|---|
| ISSN: | 0003-9438 |
|---|
| UDC: | 636.2:637.127 |
|---|
| ISSN on article: | 0003-9438 |
|---|
| COBISS.SI-ID: | 4370220 |
|---|
| DOI: | 10.5194/aab-60-373-2017 |
|---|
| NUK URN: | URN:SI:UM:DK:E5WMDPAR |
|---|
| Publication date in DKUM: | 24.10.2017 |
|---|
| Views: | 1715 |
|---|
| Downloads: | 546 |
|---|
| Metadata: |    |
|---|
| Categories: | Misc.
|
|---|
|
:
|
Copy citation |
|---|
| | | | Average score: | (0 votes) |
|---|
| Your score: | Voting is allowed only for logged in users. |
|---|
| Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
