Animal Health and Production in the Commercial Beef Herd and Feedlot

Radostits, O. M.

doi:10.1016/s0196-9846(17)30088-5

Cited by 17 publications

(23 citation statements)

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“…Calving interval of 12 to 13.5 months, 1.3 to 1.5 services per conception and 85 days open are considered as standard values (McDowell 1985;Radostits 2001). Fertility of dairy cows is influenced by genetics, season, age, production system, nutrition, management, environment and disease.…”

Section: Introductionmentioning

confidence: 99%

Genetic and phenotypic parameter on fertility traits of Red Chittagong Cattle in Bangladesh

2013

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The fertility of Red Chittagong Cattle (RCC) of Bangladesh was studied using data from 122 animals from four herds. The least squares means of female fertility traits were 1.4 ± 0.1, 72.6 ± 3.6% and 85.0 ± 2.0%, respectively, for number of services per pregnancy, first service pregnancy rate and overall pregnancy rate. The least squares mean of non-return rate to first service of bull was 58.7 ± 5.1%. The factor having a significant effect on female fertility was herd, while parity had no effect. Herd and parity of dam, season of service and sire had no effect on non-return rate to first service of bull. The heritability of fertility traits were very low: values were 0.07 ± 0.04, 0.03 ± 0.04, 0.05 ± 0.04 and 0, respectively, for number of services per pregnancy, first service pregnancy rate, overall pregnancy rate and non-return rate to first service of bull. The corresponding repeatability values were 0.18 ± 0.08, 0.08 ± 0.07, 0.13 ± 0.08 and -0.07 ± 0.02, respectively. This study reveals the fertility to be good. However, better reproductive management may enhance the overall herd fertility of RCC. (Bangl. vet.

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Section: Introductionmentioning

confidence: 99%

Genetic and phenotypic parameter on fertility traits of Red Chittagong Cattle in Bangladesh

2013

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“…(Radostits et al, 1994;Szenci, 1999). It is remarkable, that even the best herds could not reach these goals set up in the '90s.…”

Section: Evaluation Of the Reproductive Performance Of The Surveyed Hmentioning

confidence: 99%

New Methods in the Evaluation of Reproductive Performance in the Hungarian Dairy Herds

Fodor¹,

Kranjec²,

Ózsvári³

2016

The Role of Management Functions in Successful Enterprise Performance

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SummaryThe aim of this study is to assess the average values of the most commonly used reproductive indices, to introduce more recent parameters for measuring reproductive performance and to suggest reference values for the latter, based on a survey carried out in Hungary. Data were collected from February to May 2015, and altogether 12,723 cows were included from 21 herds in six counties. Average values of the conventional indices were: SP: 160 days, SPC: 4.27 and CR1: 22%. The SP, SPC and CR1 were much poorer than the former reference values even in the best herds. It was proven that PR is suitable for a quick review of the reproductive performance; therefore this parameter is advised for routine use in dairies. In this study, cPR was introduced as a novel parameter that is destined for overcoming inaccuracies stemming from Hungarian culling policy. Suggested reference values of the more recent parameters are: PR: 9.4%, cPR: 18%. %PORP is preferable to %Preg, since it applies only to the reproductive proportion of the herd, and its value is not influenced by the seasonal changes (calving, culling) to such a great extent and for such a long time. The use of some relevant parameters (PR, cPR, CR1, SP, %PORP) is enough for the daily routine, but in-depth analysis is required when the reproductive performance is diminishing.

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“…When quantifying the financial consequences of decreased milk yield, the cows having SCC more than 250,000/ml were regarded as ones with subclinical mastitis (consequently producing less milk), because above this threshold we can show the presence of udder pathogens in almost all the cases, while cows with SCC under 250,000 SCC/ml were regarded as healthy ones. According to the results of Raubertas and Shook (1982), Radostits et al (1994) and Ózsvári et al (2001, 2003a), who claimed that milk production loss can be identified above 100,000 SCC/ml, irrespectively of being able to find pathogens in the milk, we compared the milk yield of the groups of cows producing above and under 100 000 SCC/ml, too. After calculating the average difference between the milk yield of healthy cows (control group) and that of cows with subclinical mastitis and in view of the selling prices of raw milk the losses due to reduced milk yield could be calculated.…”

Section: Calculation Of Losses Due To Mastitismentioning

confidence: 99%

Economic impacts of mastitis and reproductive disorders in the Hungarian dairy herds

Fodor¹,

Dunay²,

Ózsvári³

2014

Challenges for the Agricultural Sector in Central and Eastern Europe

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SummaryThe sharp competition among dairy herds in the EU caused the recognition in herd managers that the main sources of losses related to herd health should be discovered. The object of this study was to quantify average annual losses due to mastitis and reproductive disorders in dairy herds. The study included 8 Hungarian herds with 6,825 Holstein-Friesian cows, altogether. The results showed that the decrease in milk production of cows suffering from subclinical mastitis means 58.9 EUR loss per cow per year. The amount of discarded milk, early culling due to mastitis and the drug costs were responsible for 49.5 EUR, 39

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Animal Health and Production in the Commercial Beef Herd and Feedlot

Cited by 17 publications

References 0 publications

Genetic and phenotypic parameter on fertility traits of Red Chittagong Cattle in Bangladesh

Genetic and phenotypic parameter on fertility traits of Red Chittagong Cattle in Bangladesh

New Methods in the Evaluation of Reproductive Performance in the Hungarian Dairy Herds

Economic impacts of mastitis and reproductive disorders in the Hungarian dairy herds

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