Six multiparous, ruminally cannulated Holstein cows (46 DIM, 584 kg of BW) and 6 primiparous Holstein cows (35 DIM, 506 kg of BW) were used in two 6 x 6 Latin squares with 21-d periods to examine the effects of level of non-fiber carbohydrate, source of fibrous carbohydrate, and Aspergillus oryzae fermentation extract on intake, digestion, and milk production. Treatments were 42 and 36% non-fib...

This study was conducted to evaluate the influence of category (heifers, primiparous or multiparous cows) on pregnancy rates in a large scale resynchronization ovulation program. Nelore heifers (n = 903), primiparous lactating cows (n = 338) and multiparous lactating cows (n = 1,223) were synchronized using a conventional protocol of estradiol/P4-based fixed-time artificial insemination (FTAI)....

Abstract The present experiment aimed to evaluate the partial replacement of corn with chocolate byproducts or protected fats in diet lactating cows on feed utilization, blood profile and lactation performance. Fifty multiparous Holstein (560±22 kg BW, 3±1 parity, 7±1 days milk, previous milk production 34±3 kg/d), were randomly assigned 5 treatments a completely randomized design for 90 days. ...

The present study aimed to verify the occurrence of displacement abomasum (DA) in dairy herds from a high-yielding region Southern Brazil. Data on breed, age, lactation number, days after calving, breeding system, number animals, and lactating cows herd were obtained 135 cases DA. A total 39 herds, 6,454 cows, including 2,987 municipality Palmeira, Paraná State, included this study. overall pre...

the objective of this study was to determine the effect of different levels of sesame wastes (sw) on performance, milk composition and blood metabolites in lactating dairy cows. in this order, eight multiparous holstein dairy cows were used in a replicated 4×4 latin square design in four periods of 21 days. treatments were control (no sesame meal supplementation), and supplemented with 5, 10 an...

the objective of this study was to determine the effects of feeding different levels of monensin on feed intake, milk production and composition, and milk fattyacid profile in lactating holstein cows. four multiparous cows averaging 517 ± 47 (sd) kg in body weight and 101 ± 19.8 (sd) days in milk were housed individually in tie-stalls. the study was conducted as a 4 × 4 latin square design for ...

The objective of this study was to determine the effect of rain tree pod meal with palm oil supplementation on feed intake, digestibility, microbial protein synthesis and microbial populations in dairy cows. Four, multiparous early-lactation Holstein-Friesian crossbred (75%) lactating dairy cows with an initial body weight (BW) of 405±40 kg and 36±8 DIM were randomly assigned to receive dietary...

The nutrient contents of perennial ryegrass (Lolium perenne L.) and alfalfa (Medicago sativa L.) are reasonably similar. Despite similarities, the lactation performance of dairy cows fed perennial ryegrass has not been compared with the lactation performance of dairy cows fed alfalfa. The present study was implemented to compare the performance of lactating cows fed alfalfa or perennial ryegras...

In the past decade, a global demand for products from organic agriculture has increased rapidly. Milk quality is of major interest to all parties. Therefore, the objective of this study was to compare cow performance and product quality on conventional and organic diets. 72 Holstein dairy cows were allotted to one of four diets: a conventional diet (CON40), an organic diet with a low amount of ...