Herd monitoring to optimise fertility in the dairy cow: making the most of herd records, metabolic profiling and ultrasonography (research into practice)

Smith, Robert F.; Oultram, Jo; Dobson, H.

doi:10.1017/s1751731114000597

Cited by 23 publications

(21 citation statements)

References 56 publications

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“…This relationship could be attributed to the negative energy balance in high-yielding cows, and not to the urea level itself. Another explanation of this phenomenon could be the adaptability of the cows to high feed protein content, which translates into a reduction of the negative effect of high milk urea content on their fertility [7].…”

Section: Discussionmentioning

confidence: 99%

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Effect of Some Factors on Number of Services per Conception in Dairy Cows

Siatka¹,

Sawa²,

Krężel-Czopek³

et al. 2017

J Vet Sci Technol

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The study involved 55 685 Polish Holstein-Friesian cows whose services per conception (SPC) averaged 2.2. Statistical analysis performed using the GLM procedure of SAS, showed significant differences in SPC value within different factors. The greatest changes were associated with daily milk yield of the cows; as it increased from ≤ 20 kg to >40 kg, the number of services required to conceive increased by 0.6. SPC value deteriorated also with an increasing number of cows in the herd (by 0.37) and with an increase in milk somatic cell count, being indicative of mastitis (by 0.11). The opposite situation existed for an increase in herd production level and lengthening of the interval between calving and first insemination (decrease of SPC by 0.31). It was also found that summer was the least favourable period for insemination and winter the most favourable (SPC=2.28 vs 2.16). Analysis of the results demonstrates that it is necessary and appropriate to account for these factors when aiming to improve cow fertility.

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Section: Discussionmentioning

confidence: 99%

“…The results of performance recording and research findings [2,[5][6][7] show that fertility of (especially high-producing) cows is deteriorating. High-yielding cows show a higher ability to mobilize energy reserves during the early lactation period [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Some Factors on Number of Services per Conception in Dairy Cows

Siatka¹,

Sawa²,

Krężel-Czopek³

et al. 2017

J Vet Sci Technol

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“…This relationship appears to be due to the negative energy balance observed in high-yielding cows, and not to the urea level itself. Another possible explanation of this phenomenon is the cows' adaptability to a high protein content in their feed, which translates into reducing the negative effect of high milk urea content on their fertility (17). Sawa et al (5) demonstrated that the urea level had a significant effect on the length of CI (417-434 days) in herds producing >6000 kg milk, with a particularly negative effect occurring at levels exceeding 300 mg/L.…”

Section: Discussionmentioning

confidence: 99%

The effect of milk urea level on fertility parameters in Holstein–Friesian dairy cows

Siatka¹,

Sawa²,

Bogucki³

et al. 2020

Turk J Vet Anim Sci

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The objective of this study was to reveal the effect of milk urea levels on the fertility of dairy cows, taking into account their age, herd production level, number of cows, season of first insemination, which were analyzed using data from the SYMLEK national system. The study included data on milk urea levels in 88,745 test-day yields of 55,685 Holstein-Friesian cows, which were milked up to 30 days before first insemination, during the period preceding 180 days of first and second lactation. The GLM procedure of the SAS package was used in the statistical calculations. Considering the observed significant relationships and tendencies, a milk urea level higher than 300 mg/L was found to negatively affect reproductive efficiency in dairy cows, although the effects of the urea level could be masked by the more profound impact of environmental factors. Regardless of the factors, an increased milk urea level was paralleled by decreased cow fertility, with statistically significant differences occurring only for the interactions with herd production level and with herd size. The unfavorable effect of the increase in the level of urea in milk (from ≤150 to >300 mg/L) on cow fertility was particularly evident in the highest producing herds (>9000 kg milk).

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“…Repeat breeding services recorded and compiled at the population level showed that 68.7% of returns to the oestrus occurred in 18 to 24 days period. Considering good oestrus detection, the target is set on 55% as described in [15]. Veterinary Medicine International [32].…”

mentioning

confidence: 99%

Reproductive Performance in a Selected Sample of Dairy Farms in Una-Sana Canton, Bosnia and Herzegovina

Softić

Martin

Skjerve

et al. 2020

Veterinary Medicine International

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Background. e production of milk and dairy products and their placement on the market represent a constant profit for the farmers/producers in Bosnia and Herzegovina (BH). e profitable operation of the dairy farms is influenced by the reproductive performance of the lactating animals. is study assessed individual animal reproductive characteristics in selected dairy farms and described their reproductive performance indicators. Results. e median age at first insemination was 493 days (5 th -95 th percentile range 429-840), while the age at first calving was 802 days (5 th -95 th percentile range 708-1168). e median pregnancy proportion at first insemination was 40% (5 th -95 th percentile range 17-62), while the cumulative pregnancy rate calculated at day-60, day-80, day-100, and day-120 showed that approximately 64% of all pregnancies happened before day-120. e calculated interservice intervals showed that approximately 69% of the repeat breeding animals came back to the oestrus in the period of 18 to 24 days. is is an indication of very good oestrus detection in selected dairy farms. e mean number of services per pregnancy was 2.61 (range 1-12). e median calving-to-first-insemination interval was 62.5 days (5 th -95 th percentile range 16-408). e calving-to-conception interval was 101 day (5 th -95 th percentile range 36-506). Finally, the calving interval was 385 days (5 th -95 th percentile range 329-773). Conclusions. ere is a need for an organised, regular, and more comprehensive recording system for the reproduction of dairy cattle among dairy farms in Una-Sana Canton. e calculated reproductive measures indicated an undulant trend in reproductive performance among selected dairy farms in Una-Sana Canton. Knowing the apparent reproductive indicators described in this study, the farmers and veterinary authorities may identify and correct areas in their management that contribute to the reproductive underperformance.

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Herd monitoring to optimise fertility in the dairy cow: making the most of herd records, metabolic profiling and ultrasonography (research into practice)

Cited by 23 publications

References 56 publications

Effect of Some Factors on Number of Services per Conception in Dairy Cows

Effect of Some Factors on Number of Services per Conception in Dairy Cows

The effect of milk urea level on fertility parameters in Holstein–Friesian dairy cows

Reproductive Performance in a Selected Sample of Dairy Farms in Una-Sana Canton, Bosnia and Herzegovina

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