Relationships among total mixed ration nutritional components and reproductive performance in high-producing dairy herds

Consentini, Carlos Eduardo Cardoso; Souza, A. H.; Sartori, Roberto; Carvalho, P.D.; Shaver, R.D.; Wiltbank, Milo C.

doi:10.3168/jdsc.2022-0265

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…There are several technical factors that can impact the efficiency of OPU-IVEP cycles, but aspects related to animal well-being should also be considered. Indeed, animal comfort, pen size, and housing are experimental elements that should be taken into account when developing nutritional trials in cattle [145]. Given that psychological stress can impair reproductive function [146], including oocyte quality [103,104], the possible stress response associated with the OPU procedure and the taking of other samples should be considered, attempting to minimize severity (e.g., liver biopsy) and duration (serial venepuncture) of sampling along with a reduction in sampling time points.…”

Section: Experimental Considerations In Nutritional Research With Bov...mentioning

confidence: 99%

Nutritional Strategies to Promote Bovine Oocyte Quality for In Vitro Embryo Production: Do They Really Work?

Velazquez

2023

Veterinary Sciences

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The ability of bovine oocytes to reach the blastocyst stage (i.e., embryo with around 150 cells in cattle) in vitro can be affected by technical (e.g., culture medium used) and physiological factors in oocyte donors (e.g., age, breed). As such, the nutritional status of oocyte donors plays a significant role in the efficiency of in vitro embryo production (IVEP), and several nutritional strategies have been investigated in cattle subjected to ovum pick-up (OPU). However, there is no clear consensus on the reliability of nutritional schemes to improve IVEP in cattle. Available evidence suggests that a moderate body condition score (i.e., 3 in a 1–5 scale) in cattle is compatible with a metabolic microenvironment in ovarian follicles that will promote embryo formation in vitro. The usefulness of fatty acid and micronutrient supplementation to improve IVEP in cattle is debatable with the current information available. Overall, the supply of maintenance nutritional requirements according to developmental and productive stage seems to be enough to provide bovine oocyte donors with a good chance of producing embryos in vitro. Future nutrition research in cattle using OPU-IVEP models needs to consider animal well-being aspects (i.e., stress caused by handling and sampling), which could affect the results.

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Section: Experimental Considerations In Nutritional Research With Bov...mentioning

confidence: 99%

Nutritional Strategies to Promote Bovine Oocyte Quality for In Vitro Embryo Production: Do They Really Work?

Velazquez

2023

Veterinary Sciences

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The economic optimization of lactation and fertility in dairy cows

Tohumcu,

Tulan Tohumcu

2024

CABI Reviews

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Lactation and fertility are recognized as fundamental factors that directly influence the sustainability of dairy farming. For farms working with high-yielding dairy cows in particular, maintaining fertility parameters at economically optimal levels is crucial to ensuring the continued viability of such operations. This review underscores the necessity of implementing multifaceted strategies to attain optimal lactation and fertility outcomes, elucidating the requisite steps involved in the execution of these strategies. These include the careful execution of estrus monitoring plans, comprehensive staff training, systematic record-keeping, ensuring optimal fertility parameters, and the judicious interpretation of herd management mathematics. Accurate forecasting and investment necessitate consideration of current market dynamics. Understanding the complex interplay between lactation and fertility in dairy cows is a critical prerequisite for improving overall economic productivity through herd management. To this end, the review presented simulates how the optimization of these two parameters can be achieved and their target values, based on a 100-head herd. While the exemplary model is based on costs in Türkiye, readers can adapt this simulation to calculate according to their own country’s standards. Furthermore, the simulation evinced that dairy farms relying solely on milk production incur losses, highlighting the need for diversification to ensure sustainability. In conclusion, the symbiotic relationship between lactation and fertility demands a mathematical approach, and the adoption of these integrated strategies is essential for the sustainability of dairy farms. In this context, profitability can be attained by heeding all cautions regarding the optimization of fertility and lactation, while closely monitoring current market costs.

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Perda gestacional em bovinos

Sartori,

Silva,

Silva

et al. 2024

ALPA

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A eficiência reprodutiva é determinante para o potencial produtivo e a rentabilidade dos sistemas de criação de bovinos, tanto leiteiros quanto de corte. Para tanto, é necessário não somente que as fêmeas tenham capacidade de emprenhar rapidamente, mas também que sejam capazes de manter essa gestação até o parto, gerando um bezerro saudável e uma lactação produtiva. Nesse contexto, um dos principais desafios a ser enfrentado é a perda gestacional (PG), que impacta negativamente a viabilidade econômica e a capacidade produtiva dos rebanhos. A ocorrência de PG acarreta custos elevados para o sistema de produção, especialmente quando ocorre em estágios mais avançados da gestação. A PG pode ser categorizada pela morte embrionária precoce, morte embrionária tardia e morte fetal, dependendo do estágio gestacional em que ocorre. Estudos têm demonstrado que a maior incidência de PG ocorre no período embrionário precoce, ainda antes do primeiro diagnóstico de gestação, dificultando sua detecção e mitigação. Diversos fatores podem estar associados à PG em rebanhos de corte e leiteiros. Dentre esses fatores, destacam-se efeitos genéticos, metabólicos, nutricionais e endócrinos, além de fatores relacionados à ambiência, saúde e manejo do rebanho. A compreensão destes fatores, bem como o melhor entendimento dos mecanismos que podem acarretar a PG é essencial para o desenvolvimento de estratégias que melhorem a eficiência reprodutiva e, consequentemente, a rentabilidade dos sistemas de produção. O objetivo desta revisão é discutir a incidência de PG em bovinos, suas causas, fatores associados e possíveis estratégias para reduzi-las.

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Relationships among total mixed ration nutritional components and reproductive performance in high-producing dairy herds

Cited by 3 publications

References 32 publications

Nutritional Strategies to Promote Bovine Oocyte Quality for In Vitro Embryo Production: Do They Really Work?

Nutritional Strategies to Promote Bovine Oocyte Quality for In Vitro Embryo Production: Do They Really Work?

The economic optimization of lactation and fertility in dairy cows

Perda gestacional em bovinos

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