Effects of nutrition on the fertility of lactating dairy cattle

Rodney, R.M.; Celi, Pietro; Scott, W F; Breinhild, K.; Santos, J.E.P.; Lean, I.J.

doi:10.3168/jds.2017-14064

“…The effects of dietary interventions during transition are complex and multifactorial [40]. Several studies have investigated the effect of nutritional interventions during transition on pregnancy proportions, resumption of cyclicity, calving interval, and number of AI per pregnancy, as measures of reproductive performance.…”

Section: Discussionmentioning

confidence: 99%

“…Nonetheless, it has been recognized that some nutrients improve reproductive performance. Rodney et al in 2018 [40] suggested that increased FA, starch, and metabolizable energy balance intake was positively associated with the proportion of pregnant cows. On the other hand, the authors concluded that the increased intake of rapidly fermentable sugars and high milk protein yield are associated with reduced proportion of pregnant cows.…”

Section: Discussionmentioning

confidence: 99%

The effect of an organic rumen-protected fat supplement on performance, metabolic status, and health of dairy cows

Manríquez

¹

,

Chen²,

Meléndez³

et al. 2019

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0

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Background Negative energy balance during the transition period is a concern for both conventional and certified organic dairy systems. During early lactation, supplemental strategies are used to cope with nutrient deficiencies that are associated with impaired health, production, and reproduction. As organic certified dairies in the United States face restricted access to dietary supplements, the evaluation of products especially formulated for organic production is needed. Our objective was to assess the effect of supplementing 0.45 kg/d of an organic rumen-protected fat (RPF) on health, metabolic status, and productive and reproductive performance of organic certified Holstein cows from 1 to 150 days in milk (DIM). Two-hundred and two cows were enrolled in a randomized blocked controlled trial conducted from January to July, 2017 in a certified organic dairy located in Northern Colorado (USA). Two groups were randomly assigned to be individually supplemented with organic RPF (ORG; n = 100) or control pellets (CON; n = 102) once per day, in addition to the total mixed ration (TMR). Outcomes of interest included disease occurrence, culling, mortality, serum concentration of glucose and non-esterified fatty acids (NEFA), milk yield (kg/d) and milk components, resumption of cyclicity, time-to-first artificial insemination (AI), conception at first AI, and conception within 150 DIM. Results A significant effect for the inclusion of RPF was found in daily milk yield; RPF supplemented cows had greater milk yield (1.6 kg/d) compared to CON cows up to 150 DIM (P = 0.03). During grazing, multiparous (MP) ORG cows had greater milk yield compared to MP CON cows, whereas no effect was found in primiparous (PP) cows. Health outcomes, serum metabolite concentrations, and reproductive performance were not affected by the inclusion of RPF. Body condition loss was smaller in the ORG group up to 80 DIM; however, there was no effect on body condition during the grazing season and in the overall study period. Conclusions These results indicate that supplementation of RPF increased daily milk yield and prevented body condition loss during transition. However, RPF supplementation did not affect health, serum metabolite concentration, milk components, and reproductive outcomes.

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“…The effects of dietary interventions during transition are complex and multifactorial [32]. Several studies have investigated the effect of nutritional interventions during transition on pregnancy proportions, resumption of cyclicity, calving interval, and number of AI per pregnancy, as measures of reproductive performance.…”

Section: Discussionmentioning

confidence: 99%

“…Nonetheless, it has been recognized that some nutrients improve reproductive performance. Rodney et al in 2018 [32] suggested that increased FA, starch, and metabolizable energy balance intake was positively associated with the proportion of pregnant cows. On the other hand, the authors concluded that the increased intake of rapidly fermentable sugars and high milk protein yield are associated with reduced proportion of pregnant cows.…”

Section: Discussionmentioning

confidence: 99%

The effect of an organic rumen-protected fat supplement on performance, metabolic status, and health of dairy cows

Manríquez

¹

,

Chen²,

Meléndez³

et al. 2019

Preprint

0

View full text Add to dashboard Cite

Background Negative energy balance during the transition period is a concern for both conventional and certified organic dairy systems. During early lactation, supplemental strategies are used to cope with nutrient deficiencies that are associated with impaired health, production, and reproduction. As organic certified dairies in the United States face restricted access to dietary supplements, the evaluation of products especially formulated for organic production is needed. Our objective was to assess the effect of supplementing 0.45 kg/d of an organic rumen-protected fat (RPF) on health, metabolic status, and productive and reproductive performance of organic certified Holstein cows from 1 to 150 days in milk (DIM). Two-hundred and two cows were enrolled in a randomized blocked controlled trial conducted from January to July, 2017 in a certified organic dairy located in Northern Colorado (USA). Two groups were randomly assigned to be individually supplemented with organic RPF (ORG; n = 100) or control pellets (CON; n = 102) once per day, in addition to the total mixed ration (TMR). Outcomes of interest included disease occurrence, culling, mortality, serum concentration of glucose and non-esterified fatty acids (NEFA), milk yield (kg/d) and milk components, resumption of cyclicity, time-to-first artificial insemination (AI), conception at first AI, and conception within 150 DIM. Results A significant effect for the inclusion of RPF was found in daily milk yield; RPF supplemented cows had greater milk yield (1.6 kg/d) compared to CON cows up to 150 DIM (P = 0.03). During grazing, multiparous (MP) ORG cows had greater milk yield compared to MP CON cows, whereas no effect was found in primiparous (PP) cows. Health outcomes, serum metabolite concentrations, and reproductive performance were not affected by the inclusion of RPF. Body condition loss was smaller in the ORG group up to 80 DIM; however, there was no effect on body condition during the grazing season and in the overall study period. Conclusions These results indicate that supplementation of RPF increased daily milk yield and prevented body condition loss during transition. However, RPF supplementation did not affect health, serum metabolite concentration, milk components, and reproductive outcomes.

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“…Further, within-farm variations substantially affected the estimation of the farm's median CFI in this study. e individual CFI can be extended by several factors such as nutrition [34,35], endometritis [36], and poor oestrus detection. Elkjaer et al reported that even mild uterine infection could have an adverse effect on CFI [37].…”

mentioning

confidence: 99%

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

Softić

¹

,

Martin

²

,

Skjerve

³

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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Effects of nutrition on the fertility of lactating dairy cattle

Cited by 38 publications

References 102 publications

The effect of an organic rumen-protected fat supplement on performance, metabolic status, and health of dairy cows

The effect of an organic rumen-protected fat supplement on performance, metabolic status, and health of dairy cows

The effect of an organic rumen-protected fat supplement on performance, metabolic status, and health of dairy cows

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

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