The purpose of the research was to study main indicators reproductive ability Black-and-White cows, depending on proportion Holstein genes. As material for there were taken data breeding and zootechnical records cows breed CJSC Semenovsky Breeding Plant Mari El Republic. results showed that with an increase in thorough-bredness improved. Thus, first-calf heifers a low genes (up 12.5 %) had late...

PURPOSE We determined the accuracy of sonography in the detection of isolated calf deep venous thrombosis (DVT) and the rate of indeterminate ultrasound examinations in patients with physical signs or symptoms suggestive of DVT. METHODS We reviewed the medical literature (MEDLINE) to determine the accuracy of sonography and the frequency of indeterminate studies in detecting isolated calf DVT...

documented evidence about the use of the specifi c milk replacers, we conservatively assumed that 12 of 13 case farms used the specifi c milk replacers. We estimated the odds ratio for this risk factor by using logistic regression analysis. Our results indicated that the use of the milk replacers produced by the specifi c factory was associated with BSE infection (odds ratio [OR] 39.3, 95% conf...

The basic objectives and procedures for successful crossbreeding of beef cattle were considered, with special reference to the levels of realized hybrid vigor that might be anticipated for different crossbreeding programs involving the American Brahman (Z1) and European (Ej) breeds. Intralocus heterozygosis levels with respect to breed origin of genes (breed heterozygosis) were computed for var...

Two 120-d trials (May to September, 1988 and 1989) determined the effects of grazing tall fescue (two varieties) or orchardgrass on forage intake and performance by beef cows. Each summer, 48 cow-calf pairs grazed endophyte-infected Kentucky-31 tall fescue (KY-31), endophyte-free Mozark tall fescue (MOZARK), or Hallmark orchardgrass (OG) pastures (16 pairs/treatment). Forage OM intakes and dige...

Here we report dairy calf management practices used by 242 smallholder family farmers in the South of Brazil. Data were collected via a semi-structured questionnaire with farmers, inspection of the production environment and an in-depth interview with a sample of 26 farmers. Herds had an average of 22.3 lactating cows and an average milk production of 12.7 L/cow/day. Calves were dehorned in 98%...

^ institutes until a striking <? ^at the potency by Nijland in Java, who *? g^erabty enhance through a rabbit and then cai{?-rabbit calf, Nijland's cycle is thus 1tly this has buffalo-calf?cow-calf. :+ ^as been modibeen the cycle used, but no buffalo-calf to fied by the addition of a se 0(^fication has seed cycle. This (King s) ,^e potency but still further increased not o also the yield of lym...

The effect of calving ease on the fertility and production performance of both dam and calf was studied in approximately 50,000 and 10,000 UK Holstein-Friesian heifers and heifer calves, respectively. The first objective of this study was to estimate the effect of a difficult calving on the subsequent first-lactation milk production by estimating lactation curves using cubic splines. This metho...