scholarly journals Relationship between feed efficiency indexes and thermography, blood, and ruminal parameters in pre-weaning dairy heifers

PLoS ONE ◽  
2020 ◽  
Vol 15 (7) ◽  
pp. e0236118
Author(s):  
C. F. A. Lage ◽  
S. G. Coelho ◽  
H. C. Diniz Neto ◽  
V. M. R. Malacco ◽  
J. P. P. Rodrigues ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Dairy Heifers

scholarly journals Relationship between feed efficiency indexes and performance, body measurements, digestibility, energy partitioning, and nitrogen partitioning in pre-weaning dairy heifers

PLoS ONE ◽  
2019 ◽  
Vol 14 (10) ◽  
pp. e0223368 ◽  
Author(s):  
Camila Flávia de Assis Lage ◽  
Sandra Gesteira Coelho ◽  
Hilton do Carmo Diniz Neto ◽  
Victor Marco Rocha Malacco ◽  
João Paulo Pacheco Rodrigues ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Energy Partitioning ◽  
Nitrogen Partitioning ◽  
Body Measurements ◽  
Dairy Heifers ◽  
And Performance

scholarly journals PSVI-6 Effects of feeding a novel alfalfa leaf pellet (ProLEAF MAX™) and an alfalfa stem byproduct (ProFiber Plus™) on growth and conception rates of developing dairy heifers

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 427-428
Author(s):  
Laura A Smith ◽  
Allen Y Young ◽  
Reganne K Briggs ◽  
Tevan J Brady ◽  
Caleb C Reichhardt ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Treatment Time ◽  
Repeated Measure ◽  
Treatment Groups ◽  
Dairy Heifers ◽  
Alfalfa Hay ◽  
Conception Rates ◽  
Dairy Animals ◽  
Alfalfa Leaf ◽  
Insight Into

Abstract Alfalfa is a commonly grown forage in the Intermountain west and is often included in rations for dairy animals. This study investigated the effects of including novel alfalfa products: ProLEAF MAX™ (PLM), an alfalfa leaf pellet; and ProFiber Plus™ (PFP), alfalfa stems, in the ration of dairy heifers on growth, feed efficiency, and conception. Heifers were stratified by weight and farm origin, and randomly allocated to one of three treatment groups (n = 8/treatment): control (CON, typical ration that included alfalfa hay), PLM+PFP (a ration that replaced alfalfa hay with PLM and PFP), or PFP (a ration that replaced alfalfa hay with PFP). Heifers were fed for 84 d in individual pens and feed intake and refusals were recorded daily. Weight, hip height, and wither height were recorded every two weeks and blood was collected every four weeks. Additionally, blood urea nitrogen (BUN) and conception rates were measured. Data were analyzed with day as a repeated measure and treatment as a fixed effect. Heifers fed the CON ration had increased (P < 0.05) weight gain, hip height, and dry matter intake over time compared to the treatment groups. There was a treatment*time (P < 0.05) effect on feed efficiency where heifers fed the PFP had more variable feed efficiency than CON or PLM+PFP. Treatment had an effect (P > 0.03) on BUN where CON heifers had increased BUN compared to those fed PFP. No differences (P < 0.05) were observed in conception. These data provide insight into how performance of growing heifers is affected when novel alfalfa products are included in the ration and indicate that inclusion of PFP might decrease growth of heifers by decreasing DMI. More research needs to be done to determine whether there is an optimal amount of these products to include in heifer rations.

Genetic parameters for feed intake and feed efficiency in growing dairy heifers

1991 ◽  
Vol 29 (1) ◽  
pp. 49-59 ◽  
Author(s):  
S Korver ◽  
E.A.M van Eekelen ◽  
H Vos ◽  
G.J Nieuwhof ◽  
J.A.M van Arendonk
Keyword(s):  
Feed Intake ◽  
Feed Efficiency ◽  
Genetic Parameters ◽  
Dairy Heifers

FEEDING VALUE FOR DAIRY CATTLE AND PIGS OF HIGH MOISTURE CORN PRESERVED WITH PROPIONIC ACID

1970 ◽  
Vol 50 (3) ◽  
pp. 483-489 ◽  
Author(s):  
G. M. JONES ◽  
E. DONEFER ◽  
J. I. ELLIOT
Keyword(s):  
Propionic Acid ◽  
Feed Efficiency ◽  
Milk Fat ◽  
Animal Health ◽  
Finishing Pigs ◽  
High Moisture ◽  
Dairy Heifers ◽  
Lactating Dairy Cows ◽  
Feeding Value ◽  
The Relationship

High moisture (HM) shelled corn (66.7% dry matter), preserved with 1.5% propionic acid, was fed as a part of the ration to 12 lactating dairy cows, seven growing dairy heifers, and 20 growing-finishing pigs. HM ensiled, shelled corn was fed to similar groups as a comparison. In addition, a third group of 12 cows received a commercial dairy supplement. Fat-corrected milk yield, persistency of milk production, milk fat and protein percentage, and rate of gain by dairy heifers were not significantly different between rations when HM corn was fed at 4.5 kg/animal/day. Average daily gains by pigs whose ration comprised 70% treated grain corn versus 70% ensiled grain corn were 0.70 and 0.63 kg (P < 0.01). A nonsignificant improvement in feed efficiency was observed by heifers and pigs fed treated grain corn. Mold counts were 0 and 1200 colonies/g for treated and ensiled grain corn. There was no adverse effect of propionic acid treatment upon animal health or performance. The relationship between dietary propionic acid and synthesis of milk fat, milk protein and tissue protein are discussed.

scholarly journals How Divergence for Feed Efficiency Traits Affects Body Measurements and Metabolites in Blood and Ruminal Parameters on Pre-Weaning Dairy Heifers

Animals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3436
Author(s):  
Juliana Mergh Leão ◽  
Sandra Gesteira Coelho ◽  
Camila Flávia de Assis Lage ◽  
Rafael Alves de Azevedo ◽  
Juliana Aparecida Mello Lima ◽  
...  
Keyword(s):  
Feed Intake ◽  
Feed Efficiency ◽  
Volatile Fatty Acids ◽  
High Efficiency ◽  
Body Weight Gain ◽  
Residual Body ◽  
Body Measurements ◽  
Physiological Basis ◽  
Dairy Heifers ◽  
Low Efficiency

The objectives of this study were: (1) to evaluate feed efficiency indexes and their relationships with body measurements and blood and ruminal metabolites in the pre-weaning period; (2) to determine if such measurements can be used as feed-efficiency markers during the pre-weaning period. Holstein–Gyr heifer calves (n = 36), enrolled between 4 and 12 weeks of age, were classified into two residual feed intake (RFI) and residual body weight gain (RG) groups: high efficiency (HE; RFI, n = 10; and RG, n = 9), and low efficiency (LE; RFI, n = 10; and RG, n = 8). Calves were fed whole milk (6 L/day) and solid feed ad libitum. Body developments were measured weekly and feed intake (milk and solid feed) daily during the whole period. Blood samples were collected at 12 weeks of age and analyzed for glucose, insulin and β-hydroxybutyrate (BHB). Samples of ruminal content were collected on the same day and analyzed for pH, NH3-N, and volatile fatty acids (VFA). Among the growth characteristics, only the initial hip width differed between the RFI groups, and withers height differed between the RG groups. Concentration of BHB was greater and glucose: insulin ratios tended to be greater in LE-RG animals. Butyric acid proportions were similar among RFI groups, but tended to be greater for HE-RG than for LE-RG. Overall, correlation coefficients between RFI or RG and blood, rumen, or morphometric markers were low. Thus, it is unlikely that measurements of metabolic indicators, per se, will be useful in the early identification of more efficient animals. Understanding the underlying physiological basis for improved feed efficiency in dairy heifers requires further investigation.

scholarly journals Growth and Feed Efficiency of Pureline and Crossline Dairy Heifers

1988 ◽  
Vol 71 (4) ◽  
pp. 1000-1010 ◽  
Author(s):  
A.J. Lee ◽  
C.Y. Lin ◽  
A.J. McAllister ◽  
K.A. Winter ◽  
G.L. Roy ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Dairy Heifers

Fine Structural Alterations in Thyroid Follicular Cells (FC) and Changes in Serum Thyroxine Produced by Feeding Polychlorinated Biphenyl (PCB) to Rats

1977 ◽  
Vol 35 ◽  
pp. 498-499
Author(s):  
W.T. Collins ◽  
Charles C. Capen ◽  
Louis Kasza
Keyword(s):  
Feed Efficiency ◽  
Polychlorinated Biphenyl ◽  
Serum Proteins ◽  
Skin Lesions ◽  
Hepatic Necrosis ◽  
Ultrastructural Changes ◽  
Lymphoid Tissues ◽  
Heat Transfer Fluids ◽  
Thyroid Follicular Cells ◽  
Peripheral Metabolism

The widespread contamination of the environment with PCB, a compound used extensively by industry in hydraulic and heat transfer fluids as well as plasticizers and solvents in adhesives and sealants, has resulted in detectable tissue levels in a large portion of the human population, domestic animals, and wildlife. Intoxication with PCB produces severe hepatic necrosis, degeneration of lymphoid tissues and kidney, skin lesions, decreased reproductive performance, reduced feed efficiency, and decreased weight gain. PCB also has been reported to reduce the binding of thyroid hormone to serum proteins and enhance the peripheral metabolism of thyroxine with increased excretion of thyroxine-glucuronide in the bile (Bastomsky, Endocrinology 95: 1150-1155, 1974).The objectives of this investigation were (1) to investigate the histopathologic, histochemical, and ultrastructural changes in thyroid FC produced by the acute (4 week) and chronic (12 week) administration of low (50 ppm) and high (500 ppm) doses of PCB to rats, (2) to correlate these alterations to changes in serum immunoreactive thyroxine concentration, and (3) to investigate the persistence of the effects of PCB on the thyroid gland.

Sign in / Sign up

Export Citation Format

Share Document