Article
Agriculture, Dairy & Animal Science
Indre Mecionyte, Giedrius Palubinskas, Lina Anskiene, Renata Japertiene, Renalda Juodzentyte, Vytuolis Zilaitis
Summary: Supplementation of rumen-protected choline pre- and post-calving had significant effects on the first peak of P4, benefiting reproduction performances, milk yield, and milk fat during the early postpartum period. However, there were no significant differences in protein and SCC in milk between the groups.
Article
Agriculture, Dairy & Animal Science
Joaquin Chiozza Logrono, Ramiro Rearte, Santiago Gerardo Corva, German Ariel Dominguez, Rodolfo Luzbel de la Sota, Laura Vanina Madoz, Mauricio Javier Giuliodori
Summary: An observational study on highly supplemented grazing dairy cows showed that cows developing lameness in early lactation produce less milk and have poorer reproductive performance compared to healthy cows or those developing lameness later in lactation. Cows becoming lame after the first service had longer calving to pregnancy interval than healthy cows, while cows turning lame before the first service had even longer intervals. This study highlights the importance of the timing of lameness occurrence in dairy cows' lactation in relation to productive and reproductive outcomes.
Article
Agriculture, Multidisciplinary
Jessica I. Dalton, Stacey J. Hendriks, John R. Roche, Danny J. Donaghy, Brian Dela Rue, Barbara Kuhn-Sherlock, Claire V. C. Phyn
Summary: This study investigated the effects of feeding synthetic zeolite A to multiparous grazing dairy cows and found that it may decrease appetite or alter eating behavior, particularly in younger cows. It may also improve cow comfort postcalving.
NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH
(2023)
Article
Agriculture, Dairy & Animal Science
M. B. Poindexter, R. Zimpel, A. Vieira-Neto, A. Husnain, A. C. M. Silva, A. Faccenda, A. Sanches de Avila, P. Celi, C. Cortinhas, J. E. P. Santos, C. D. Nelson
Summary: The objectives of this experiment were to determine the effects of supplementing 25-hydroxyvitamin D3 compared with vitamin D3 at 1 or 3 mg/d in late gestation on production outcomes of dairy cows. The results showed that feeding 25-hydroxyvitamin D3 increased colostrum and milk yield compared to vitamin D3. The effect of 25-hydroxyvitamin D3 on milk yield may be related to serum calcium concentrations.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Fengfei Gu, Chao Miao, Luyi Jiang, Diming Wang, Hongyun Liu, Jianxin Liu
Summary: The study showed that supplementing N-carbamoylglutamate (NCG) can enhance dry matter intake, milk production, and milk quality in early-lactating dairy cows. Additionally, NCG supplementation improved blood biochemistry and plasma amino acid concentrations, benefiting the health of postpartum cows.
Article
Agriculture, Dairy & Animal Science
Paula C. C. Molinari, Brittney D. Davidson, Jimena Laporta, Geoffrey E. Dahl, I. Martin Sheldon, John J. Bromfield
Summary: Heat stress increases susceptibility to uterine diseases in dairy cows. This study shows that implementing evaporative cooling to alleviate heat stress during late pregnancy can have carry-over effects on postpartum innate immunity, potentially reducing the incidence of uterine disease.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agronomy
J. Michael Wilkinson, A. Thomas Chamberlain, M. Jordana Rivero
Summary: Grazing dairy cows have positive impacts on food production, soil environment, animal health, and human health. Milk produced from grazing cows is beneficial for health and has a lower carbon footprint. Consumer demand for milk and milk products from cows given access to pasture is increasing.
Article
Agriculture, Dairy & Animal Science
Solange Gareli, Alejandro Mendoza, Nora M. Bello, Fernando A. Lattanzi, Santiago R. Farina, Jean Savian
Summary: In pasture-based dairy systems, grazing management strategies have mainly focused on maximizing herbage harvest per hectare, while strategies to maximize herbage intake rate have been explored recently. This study aimed to evaluate the effects of different grazing management strategies on herbage nutritional value, intake, and milk production of dairy cows, and to investigate the impact of concentrate supplementation.
ANIMAL FEED SCIENCE AND TECHNOLOGY
(2023)
Article
Agriculture, Dairy & Animal Science
Joaquin Barca, Ana Meikle, Mette Bouman, Ynte H. Schukken
Summary: This study found that the impact of PEG treatment on fertility and culling interacts with pre-NEFA levels. In high pre-NEFA cows, PEG treatment increased the rate of first insemination, countered the negative effects of early-lactation CM and UD on pregnancy rates, and decreased the hazard of culling.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
S. T. Gao, D. D. Girma, M. Bionaz, L. Ma, D. P. Bu
Summary: The transcriptomic analysis of liver in dairy cows transitioning from pregnancy to lactation revealed activation of metabolism, particularly lipid, glucose, and amino acid metabolism, with key roles of PPAR and adipocytokines signaling pathways. Despite an induction of gluconeogenesis, there was a decrease in expression of glucose transporters and inhibition of xenobiotic metabolism, likely due to inflammatory conditions. Coordination among genes related to protein synthesis, energy, lipid metabolism, and cell proliferation was observed.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
C. M. Prom, M. A. Engstrom, J. K. Drackley
Summary: This study assessed the effect of beta-carotene supplementation in cows with adequate vitamin A and E, but low beta-carotene levels. The results showed that beta-carotene supplementation increased the concentrations of beta-carotene and vitamin A in blood serum, but did not affect production, reproduction, or health.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Radisa Prodanovic, Sreten Nedic, Ivan Vujanac, Jovan Bojkovski, Svetlana Nedic, Ljubomir Jovanovic, Danijela Kirovski, Suncica Borozan
Summary: Cows in the peripartal period experience changes in thyroid hormones and are vulnerable to lipomobilization and oxidative stress. The addition of chestnut tannins in the diet may improve feed efficiency and prevent oxidative stress-related health issues. This study examined the effects of chestnut tannin supplementation during the close-up period on thyroid status and the interaction between thyroid hormones and oxidative stress biomarkers in prepartum dairy cows.
Article
Multidisciplinary Sciences
Soparak Khemarach, Saowaluck Yammuen-art, Veerasak Punyapornwithaya, Sutichai Nithithanasilp, Narongrit Jaipolsaen, Siwat Sangsritavong
Summary: In tropical climates, beta-carotene supplementation can improve reproductive performance in cows by reducing oxidative stress, as demonstrated in this study in Thailand.
SCIENTIFIC REPORTS
(2021)
Article
Agriculture, Dairy & Animal Science
R. Rearte, S. G. Corva, R. L. de la Sota, I. M. Lacau-Mengido, M. J. Giuliodori
Summary: Poor udder health status has a negative impact on milk yield and reproductive performance in dairy cows. This study found that somatic cell count (SCC) is negatively associated with daily milk yield and the odds for conception in grazing dairy cows.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Levente Kovacs, Ferenc Pajor, Mikolt Bakony, Hedvig Febel, Joan E. Edwards
Summary: Butyrate is commonly used as a feed additive to support gut health in pigs, poultry, and young ruminants. However, the effects of precalving butyrate supplementation on dairy cows and their calves have not been extensively studied. This on-farm study found that prepartum magnesium butyrate (MgB) supplementation enhanced colostrum yield and improved various parameters in dairy cows, such as lactation performance, calving ease, fertility, and body condition score. The calves in the MgB-supplemented group also showed increased vitality at birth. These findings highlight the wide range of benefits provided by prepartum MgB supplementation for dairy cows and their newborn calves.
Article
Agriculture, Dairy & Animal Science
J. A. A. Pires, K. Pawlowski, J. Rouel, C. Delavaud, G. Foucras, P. Germon, C. Leroux
JOURNAL OF DAIRY SCIENCE
(2019)
Article
Reproductive Biology
A. Fernandez-Foren, C. Sosa, J. A. Abecia, M. I. Vazquez, F. Forcada, A. Meikle
Article
Agriculture, Dairy & Animal Science
M. Claramunt, A. Meikle, P. Soca
Article
Reproductive Biology
Gretel Ruprechter, Mirela Noro, Otavio Meotti, Chester Batista, M. de Lourdes Adrien, Joaquin Barca, Ana Meikle
Article
Reproductive Biology
Victoria de Brun, Juan J. Loor, Hugo Naya, Mario Vailati-Riboni, Omar Bulgari, Khuram Shahzad, Jose Alfonso Abecia, Cecilia Sosa, Ana Meikle
Article
Reproductive Biology
A. Grana-Baumgartner, A. Meikle, A. Fernandez-Foren, K. Neimaur, N. Barrera, F. Cuadro, P. C. dos Santos-Neto, D. Bosolasco, R. Nunez-Olivera, M. Crispo, A. Menchaca, V de Brun
Article
Reproductive Biology
R. Nunez-Olivera, F. Cuadro, D. Bosolasco, V de Brun, J. de la Mata, C. Brochado, A. Meikle, G. A. Bo, A. Menchaca
Article
Multidisciplinary Sciences
Joaquin Barca, Ynte H. Schukken, Ana Meikle
Summary: The study aimed to determine if parity influenced the effect of PEG treatment on WBC counts in grazing dairy cows, finding that it was independent of parity. In the control group, Pre-NEFA concentration was associated with reduced WBC, neutrophil, and lymphocyte counts.
Article
Reproductive Biology
Victoria de Brun, Juan J. Loor, Hugo Naya, Andrea Grana-Baumgartner, Mario Vailati-Riboni, Omar Bulgari, Khuram Shahzad, Jose Alfonso Abecia, Cecilia Sosa, Ana Meikle
Summary: Transcriptomics and bioinformatics were used to study the impact of undernutrition and pregnancy on uterine immune system and remodeling. Results showed that pregnancy altered gene expression, particularly immune system and uterine remodeling genes, while undernutrition attenuated these effects.
Article
Reproductive Biology
D. Bosolasco, R. Nunez-Olivera, V. de Brun, A. Meikle, A. Menchaca
Summary: Administering estradiol cypionate at progesterone insert removal can increase serum estradiol concentrations, enhance ovulation, and improve uterine function in postpartum anestrous beef cows. The dose of estradiol cypionate affects the timing of ovulation and the size of the ovulatory follicle.
Article
Agriculture, Dairy & Animal Science
Joaquin Barca, Ana Meikle, Mette Bouman, Ynte H. Schukken
Summary: This study found that the impact of PEG treatment on fertility and culling interacts with pre-NEFA levels. In high pre-NEFA cows, PEG treatment increased the rate of first insemination, countered the negative effects of early-lactation CM and UD on pregnancy rates, and decreased the hazard of culling.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Joaquin Barca, Ynte H. Schukken, Ana Meikle, Pablo Chilibroste, Mette Bouman, H. Hogeveen
Summary: This randomized controlled trial examined the effects of pegbovigrastim (PEG) treatment on the partial net return of grazing dairy cows. The study found that PEG treatment increased the partial net return and resulted in an economic benefit of $210 ± $100 per cow per year. It also reduced the cost of treatment for clinical mastitis and numerically reduced the cost of culling.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Lucia Grille, Daniela Escobar, Maria Noel Mendez, Maria de Lourdes Adrien, Laura Olazabal, Victor Rodriguez, Ronny Pelaggio, Pablo Chilibroste, Ana Meikle, Juan Pablo Damian
Summary: Pasture-based systems have advantages over confined systems, but in mixed systems cows are more exposed to external climatic conditions. This study aimed to compare the fatty acid profiles between mixed systems with different conditions during confinement. The compost-bedded pack barns during confinement in a mixed system resulted in better milk quality compared to the outdoor soil-bedded pen. However, the fatty acid profiles in the milk and cheese were affected more by feeding management than by controlling the environment during confinement.
Article
Agriculture, Dairy & Animal Science
Gonzalo Marichal, Pablo Trigo, Carlos Soto, Ana Meikle, Gonzalo Suarez
Summary: This study analyzed the hydroelectrolytic parameters of 900 horses participating in RAIDs under different climate conditions. It found that electrolyte losses in horses that did not finish the race were more significant when weather conditions were more severe. The data confirmed the importance of climate conditions on hydroelectrolytic losses in RAIDs.
Article
Agriculture, Dairy & Animal Science
Graciana R. Mendina, Juan Pablo Damian, Ana Meikle, Pablo Chilibroste, Oscar Bentancur, Maria de Lourdes Adrien
Summary: This study compared the association between compost barns (CB) and outdoor soil-bedded yard (OD) housing in Holstein dairy cows. The results showed that cows in OD had higher udder hygiene scores but no significant differences in intramammary infection (IMI) and clinical mastitis compared to CB cows.