scholarly journals The effect of respiratory disease and a preventative antibiotic treatment on growth, survival, age at first calving, and milk production of dairy heifers

2012 ◽  
Vol 95 (9) ◽  
pp. 4950-4960 ◽  
Author(s):  
A.L. Stanton ◽  
D.F. Kelton ◽  
S.J. LeBlanc ◽  
J. Wormuth ◽  
K.E. Leslie
Keyword(s):  
Respiratory Disease ◽  
Antibiotic Treatment ◽  
Milk Production ◽  
Age At First Calving ◽  
Dairy Heifers

Economics of respiratory disease in dairy replacement heifers

2020 ◽  
Vol 21 (2) ◽  
pp. 143-148
Author(s):  
Michael W. Overton
Keyword(s):  
Respiratory Disease ◽  
Milk Production ◽  
Incident Case ◽  
Data Set ◽  
Dairy Heifers ◽  
The Usa ◽  
History Of ◽  
On Farm ◽  
The Impact ◽  
Selective Culling

AbstractBovine respiratory disease (BRD) is a frequent disease concern in dairy cattle and is most commonly diagnosed in young dairy heifers. The impact of BRD is highly variable, depending on the accuracy and completeness of detection, effectiveness of treatment, and on-farm culling practices. Consequences include decreased rate of weight gain, a higher culling risk either as heifers or as cows, delayed age at first service, delayed age at first calving, and in some cases, lower future milk production. In this data set of 104,100 dairy replacement heifers from across the USA, 36.6% had one or more cases diagnosed within the first 120 days of age with the highest risk of new cases occurring prior to weaning. Comparison of the raising cost for heifers with BRD and those without a recorded history of BRD resulted in an estimated cost per incident case occurring in the first 120 days of age of $252 or $282, depending upon whether anticipated future milk production differences were considered or not. Current market conditions contributed to a cost estimate that is significantly higher than previously published estimates, driven in part by the losses associated with selective culling of a subset of heifers that experienced BRD.

scholarly journals Effect of prepartum dry cow antibiotic treatment in dairy heifers on udder health and milk production

2009 ◽  
Vol 92 (9) ◽  
pp. 4395-4403 ◽  
Author(s):  
O.C. Sampimon ◽  
S. De Vliegher ◽  
H.W. Barkema ◽  
J. Sol ◽  
T.J.G.M. Lam
Keyword(s):  
Antibiotic Treatment ◽  
Milk Production ◽  
Udder Health ◽  
Dairy Heifers

scholarly journals Factors affecting the milk production of dairy cattle in northern rural areas of Bangladesh

2015 ◽  
Vol 4 (2) ◽  
pp. 41-45 ◽  
Author(s):  
MR Begum ◽  
M Anaruzzaman ◽  
MSI Khan ◽  
M Yousuf
Keyword(s):  
Body Weight ◽  
Dairy Cattle ◽  
Milk Production ◽  
Rural Areas ◽  
Binary Logistic Regression ◽  
Cross Sectional Study ◽  
Lactation Period ◽  
Cross Sectional ◽  
Age At First Calving ◽  
Factors Affecting

A cross sectional study was conducted to observe the factors affecting the productive performance of dairy cattle from northern rural areas of Bangladesh during July and September 2013. Data of 105 cows, 85 (80.95%) from local and 20 (19.05%) cows from cross breed, were randomly selected for the study. A binary logistic regression, expressed by odds ratio with 95% confidence interval, was done to determine the association of daily milk production categorized into ? 2 and > 2 liters (L), based on median, with the significant explanatory variables of body weight, age at first calving, lactation period, vitamin use, type of floor and milking person. The result demonstrated that the probability of milk production of >2 L was 6.16, 4.5, 20.65 and 5.7 times higher from the with animal body weight of >140 kg, age at first calving of >36 m, lactation period of >8 m and vitamin use than that of body weight of 140 kg, age at first calving of ?36 m, lactation period of ? 8 m, and not vitamin used respectively. The chance of milk production of > 2 L was 0.25 and 0.22 times lower for mud floor, and owner milking than that of brick floor and gowala (professional milking person) respectively. DOI: http://dx.doi.org/10.3329/ijarit.v4i2.22646 Int. J. Agril. Res. Innov. & Tech. 4 (2): 41-45, December, 2014

To determine the relationships between age, weight and size in Holstein heifers between 100 and 300 kg liveweight

1999 ◽  
Vol 1999 ◽  
pp. 199-199
Author(s):  
H.J. Biggadike ◽  
C.A. Collins ◽  
S.B. Drew ◽  
P.N. Johnson
Keyword(s):  
Milk Production ◽  
Growth Rates ◽  
Deleterious Effect ◽  
High Growth ◽  
Mammary Development ◽  
Dairy Heifers

It is common practice to rear dairy heifers to calve at 24 months of age and expect first lactation milk yields of up to 10,000 litres. This requires growth rates of at least 0.7kg/d during rearing. Research has indicated that high growth rates in the prepubertal period can have a deleterious effect on mammogenisis (Capuco et al 1995), and a significant reduction in potential milk production (Sejrsen et al 1996) due to impaired mammary development. However, not all studies have found such effects (Sejrsen et al 1996). As a consequence, strategies of rearing are being studied to identify the optimum pattern of growth around puberty to achieve high milk yields. Skeletal measurements have also been demonstrated to be related to first lactation yields (Hoffman 1996). This study investigated the consequences of differing growth rates between 100 and 300kg liveweight on the size and relative dimensions of Holstein heifers.

Linear versus seasonal growth of dairy heifers decreased age at puberty but did not affect first lactation milk production

2019 ◽  
pp. 1-18
Author(s):  
Rhiannon C. Handcock ◽  
Catriona M. C. Jenkinson ◽  
Richard Laven ◽  
Lorna R. McNaughton ◽  
Nicolas Lopez-Villalobos ◽  
...  
Keyword(s):  
Milk Production ◽  
Seasonal Growth ◽  
Dairy Heifers ◽  
Age At Puberty

scholarly journals Factors affecting the functional length of productive life in Slovak Pinzgau cows

2008 ◽  
Vol 53 (No. 3) ◽  
pp. 91-97 ◽  
Author(s):  
G. Mészáros ◽  
J. Wolf ◽  
O. Kadlečík
Keyword(s):  
Milk Production ◽  
Linear Increase ◽  
Production Level ◽  
Proportional Hazard ◽  
Proportional Hazard Model ◽  
Age At First Calving ◽  
Factors Affecting ◽  
Productive Life ◽  
The Impact ◽  
Effect Of Age

A proportional hazard model was used to analyze the impact of the most important factors on the length of productive life in 44 796 Slovak Pinzgau cows. The calculations were carried out with Survival Kit 3.12. The milk production level within a herd was the most important factor. The relation between the milk production level and the culling risk was strongly non-linear. Cows with extremely low milk production (less than 1.5 standard deviations below average) had a 4.8 times higher culling risk than average cows. The culling risk for the highest yielding cows was about one half of the risk of average cows. In the first lactation the culling risk was highest at the beginning and decreased in the course of lactation whereas in subsequent lactations the culling risk was highest at the end of lactation. The risk decreased with parity. The effect of age at first calving did not have a large influence on the length of productive life, although a linear increase in culling risk was observed as the age at first calving increased. Cows from expanding herds were at lower risk to be culled compared to cows in herds of stable and decreasing size.

The effects of plane of nutrition and diet type on lactogenic hormone levels, growth and milk production in high genetic merit dairy heifers

1998 ◽  
Vol 1998 ◽  
pp. 198-198
Author(s):  
A.F. Carson ◽  
F.J. Gordon ◽  
A.R.G. Wylie ◽  
J.E. McEvoy
Keyword(s):  
Milk Production ◽  
Growth Rates ◽  
Genetic Merit ◽  
Hormone Levels ◽  
Dairy Heifers ◽  
Lactogenic Hormone ◽  
Nutrition And Diet ◽  
Diet Type

To develop appropriate rearing regimes for high genetic merit dairy heifers, information is required on the effect of growth rates and diet type within the various stages of die animal’s life on performance. The aims of this study were to investigate (1) the effects of plane of nutrition and diet type during the pre-pubertal period on lactogenic hormone levels and (2) the effects of plane of nutrition during die post-pubertal period on lactogenic hormone levels, growth and milk production.

scholarly journals Prepartum Antibiotic Treatment of Heifers: Milk Production, Milk Quality and Economic Benefit

2003 ◽  
Vol 86 (4) ◽  
pp. 1187-1193 ◽  
Author(s):  
S.P. Oliver ◽  
M.J. Lewis ◽  
B.E. Gillespie ◽  
H.H. Dowlen ◽  
E.C. Jaenicke ◽  
...  
Keyword(s):  
Antibiotic Treatment ◽  
Milk Production ◽  
Economic Benefit ◽  
Milk Quality

Effect of plane of nutrition between 6 and 16 months of age on body composition, plasma hormone concentrations and first-lactation milk production in Holstein heifers

1992 ◽  
Vol 72 (2) ◽  
pp. 337-346 ◽  
Author(s):  
K. Stelwagen ◽  
D. G. Grieve
Keyword(s):  
Body Composition ◽  
Milk Production ◽  
Crude Protein ◽  
Critical Weight ◽  
Dairy Heifers ◽  
Randomized Design ◽  
Production Group ◽  
Completely Randomized Design ◽  
Gland Development

In a completely randomized design, 47 dairy heifers (6–8 mo of age) were assigned to a low (L), medium (M) or high (H) plane of nutrition to determine its effect on body composition (Slaughter Group, n = 23), subsequent first lactation (260 d) milk production (Production Group, n = 24) and blood somatotropin and insulin concentrations (n = 12 from each Slaughter and Production group). Actual daily gains between 6 and 16 mo of age were 611 g (L), 737 g (M) and 903 g (H). The proportion of carcass fat in heifers sacrificed at 16 mo increased while the proportion of lean and bone tissue decreased with increasing plane of nutrition. Concentrations of somatotropin measured at 9 and 14 mo of age decreased but insulin did not differ (9 mo) or tended (P < 0.10) to increase (14 mo) with increasing feeding level. Insulin concentrations at 9 and 14 mo of age were correlated positively with mammary crude protein and dry fat-free tissue at slaughter (9 mo, P < 0.05; 14 mo, P < 0.07), implying that insulin may play a role in mammogenesis in vivo. Plane of nutrition during the rearing period did not significantly affect production and composition of milk in the first lactation. It is speculated that this may be due to the fact that the heifers weighed approximately 200 kg at the start of the experiment, because recent research has demonstrated that the critical weight range during which mammary gland development is affected by plane of nutrition is between 90 and 200 kg. Key words: Heifer, somatotropin, insulin, lactation, plane of nutrition, body composition

Sign in / Sign up

Export Citation Format

Share Document