Article
Agriculture, Dairy & Animal Science
K. T. Williams, K. A. Weigel, W. K. Coblentz, N. M. Esser, H. Schlesser, P. C. Hoffman, R. Ogden, H. Su, M. S. Akins
Summary: The objective of this study was to compare the growth, feed intake, and feed efficiency of postbred dairy heifers with different genomic RFI when offered diets with different energy densities. Results showed that heifers with low RFI had higher daily gains and feed efficiencies when fed a low energy diet.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
G. M. Pereira, B. J. Heins, B. Visser, L. B. Hansen
Summary: This study compared the differences in dry matter intake, milk production, body weight, body condition score, and feed efficiency between CB cows and HO cows fed with different diets. When CB cows were fed with the HFLS diet, compared to HO cows fed with the TRAD diet, the dry matter intake and body weight decreased, while milk production, fat plus protein production, and feed efficiency showed no significant differences. In terms of residual feed intake, CB cows fed with the HFLS diet had lower and more desirable values compared to HO cows fed with the TRAD diet.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
J. P. Rosadiuk, T. C. Bruinje, F. Moslemipur, A. J. Fischer-Tlustos, D. L. Renaud, D. J. Ambrose, M. A. Steele
Summary: The study showed that increasing pre- and postweaning planes of nutrition positively impacted several indicators related to heifer development before 25 weeks of age. However, there was limited interaction in growth and development indicators between the two phases.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Amir Behrouzi, Marcos Colazo, Changxi Li, Carolyn Fitzsimmons
Summary: The study examined the effect of residual feed intake adjusted for backfat thickness on pregnancy rate in Angus heifers. The results showed that selecting for feed efficiency may have negative consequences on fertility.
CANADIAN JOURNAL OF ANIMAL SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
M. Malekkhahi, A. Razzaghi, M. Ahmadi Zadeh, B. Satlekh Mohammadi, P. Khosravi, M. R. Farrokhi, J. K. Drackley, D. Vyas
Summary: The effects of different corn processing methods on the growth and digestion of young dairy heifers were evaluated in this study. The results showed that feeding crumbled corn (CRC) had advantages in terms of total-tract starch digestibility, average daily gain (ADG), and final body weight compared to other processing methods. On the other hand, fine-ground corn (FGC) performed poorly. Additionally, CRC feeding may have positive effects on feed intake and feeding behavior.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
Krista R. Wellnitz, Cory T. Parsons, Julia M. Dafoe, Darrin L. Boss, Samuel A. Wyffels, Timothy DelCurto, Megan L. Van Emon
Summary: Replacement beef heifers are crucial for the future of a herd, and selecting the right ones is essential. This study found that post-weaning feed intake classification had only minor impacts on the lifetime productivity of Angus beef females, with age being a more important factor.
Article
Agriculture, Dairy & Animal Science
Hadi Esfandyari, Just Jensen
Summary: The study aimed to develop a procedure for simultaneous analysis of basic records and derive linear traits related to feed efficiency without approximation. A bivariate longitudinal random regression model was used to analyze individual longitudinal records of weight and feed intake from a large group of beef bulls, estimating genetic and permanent environmental covariance functions.
JOURNAL OF ANIMAL SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
C. I. V. Manzanilla-Pech, P. Lovendahl, D. Mansan Gordo, G. F. Difford, J. E. Pryce, F. Schenkel, S. Wegmann, F. Miglior, T. C. Chud, P. J. Moate, S. R. O. Williams, C. M. Richardson, P. Stothard, J. Lassen
Summary: The study estimated genetic parameters of methane traits, genetic correlations, and evaluated the potential impact of including methane in the breeding goal on economically important traits.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
M. U. Akhtar, Hifzulrahman, M. Saadullah, T. N. Pasha, M. Abdullah, M. Ahmed, R. M. Shahbakht, M. N. Haque
Summary: The study indicates that prepartum controlled intake of a high protein diet can increase milk yield and lactation performance of dairy cows.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
M. Ansari, S. Kargar, M. A. Eslami, R. Falahati, M. Albenzio, M. Caroprese, M. J. Zamiri, M. Kanani
Summary: This study investigates the effects of early-life supplementation of fennel seed powder (FSP) or oregano leaf powder (OLP) on growth performance, health, and blood biochemical attributes in preweaning dairy calves. The results show that supplementing liquid feed with FSP or OLP can improve calf growth and health, and FSP has a better effect on reducing rectal temperature.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Agriculture, Dairy & Animal Science
J. D. Quigley, T. S. Dennis, F. X. Suarez-Mena, C. E. Chapman, T. M. Hill, K. M. Aragona
Summary: This study aimed to predict voluntary daily dry feed intake in Holstein calves using various linear and nonlinear models. The best model identified was an exponential model, with factors such as age, temperature, and neutral detergent fiber concentration being used for prediction. The models developed may provide a better understanding of nutrient supply to young Holstein calves and improve growth performance prediction.
JOURNAL OF DAIRY SCIENCE
(2021)
Article
Agriculture, Dairy & Animal Science
Cory T. Parsons, Julia M. Dafoe, Samuel A. Wyffels, Timothy DelCurto, Darrin L. Boss
Summary: The study found that post-weaning RFI had minimal effects on beef cattle performance, grazing behavior, or resource utilization; however, cow age impacted both grazing behavior and resource use.
Article
Agriculture, Dairy & Animal Science
Carlos Arce-Recinos, Nadia Florencia Ojeda-Robertos, Ricardo Alfonso Garcia-Herrera, Jesus Alberto Ramos-Juarez, Angel Trinidad Pineiro-Vazquez, Jorge Rodolfo Canul-Solis, Luis Enrique Castillo-Sanchez, Fernando Casanova-Lugo, Einar Vargas-Bello-Perez, Alfonso Juventino Chay-Canul
Summary: This study investigated residual feed intake, volatile fatty acid production, and enteric methane emissions in growing Pelibuey sheep. The results showed that low residual feed intake lambs had lower intake of dry matter, organic matter, crude protein, and neutral detergent fiber, resulting in lower methane emissions.
Article
Agriculture, Dairy & Animal Science
S. Kargar, F. Nowroozinia, M. Kanani
Summary: The study investigated the effects of fennel seed powder (FSP) on nutrient intake, growth rate, body weight, oro-sensorial preferences, and sorting behaviors in newborn Holstein dairy calves. Results showed that feeding FSP can increase starter feed intake, growth performance, and oro-sensorial preference, while decreasing non-nutritive oral behaviors and sorting index for certain particle sizes.
ANIMAL FEED SCIENCE AND TECHNOLOGY
(2021)
Article
Agriculture, Dairy & Animal Science
J. E. Carrelli, M. Gobikrushanth, M. Corpron, I Rajesh, W. Sandberg, M. G. Colazo, A. Ahmadzadeh, M. Oba, D. J. Ambrose
Summary: This study measured AGD in nulliparous dairy heifers and found an inverse relationship between AGD and fertility measures, consistent with earlier findings in lactating dairy cows. These results strengthen the potential for AGD to be utilized as a fertility trait and management tool in future selection programs.
JOURNAL OF DAIRY SCIENCE
(2021)