BACKGROUND The objective was to determine the effect of prepartum diets supplemented with rolled canola seed (high in oleic acid) or sunflower seed (high in linoleic acid) on luteinizing hormone (LH) pulsatility and gonadotropin releasing hormone (GnRH)-induced LH release during early postpartum. METHODS Thirty-one pregnant Holstein cows, blocked by body condition score, parity and expected c...

Twenty four periparturient cows were used to determine the effects of DCAD on acid-base balance, plasma and urine mineral concentrations, health status, and subsequent lactation performance. Each group of 12 cows received either a diet containing -100 DCAD or +100 DCAD for 21 d prepartum. Both anionic and cationic groups were divided into two groups, one received a +200 DCAD and the other +400 ...

sixty eight holstein cows, 38 primiparous and 30 multiparous ones, were employed in a randomized complete block design, blocked to evaluate the effects of 2 diets in various ruminal fermentable carbohydrate sources (ground corn vs rolled wheat) on rumen fermentation and performance during preparturient period. primiparous and multiparous cows were blocked by parity. the cows were fed diets as t...

Abstract This study investigated the effects of dietary supplementation with chestnut tannins (CNT) on metabolic and antioxidant status prepartum cows along their colostrum quality. Pregnant multiparous Holstein were paired according to parity body condition score, assigned either a diet supplemented 20 g/d commercially available product containing (CNT, n=20) or an unsupplemented control (CON,...

Niwińska B., Andrzejewski M. (2017): Effects of selenium supplement forms on the diet–cow–calf transfer of selenium in Simmental cattle. Czech J. Anim. Sci., 62, 201–210. The aim of this study was to determine the efficiency of diet–cow–calf transfer of selenium (Se) depending on the forms of Se-supplement given to cows of Simmental breed during the last trimester of pregnancy and the first wee...

Sixty Holstein cows were assigned to two treatments at 21 d before calving and were group-fed a prepartum diet with or without yeast culture. After parturition, cows were individually fed one of five treatments for 140 d: 1) 21% forage neutral detergent fiber (NDF) without yeast culture, 2) 21% forage NDF with yeast culture, 3) 17% forage NDF without yeast culture, 4) 17% forage NDF with yeast ...

Eighty-two multiparous Holstein cows were fed diets differing in dietary cation-anion difference (DCAD) and Ca concentrations in a randomized block design experiment beginning 4 wk prior to anticipated calving to determine the effects on colostrum yield and quality and acid-base balance of their calves. Treatments were arranged as a 2 X 2 factorial to provide two DCAD (-22 mEq/100 g DM [NEG] or...

Recipient beef heifers, pregnant with single demi-embryos, were paired to according to identical twin or full-sib embryo. Within pair, recipient heifers were assigned to one of two isocaloric diets containing a control or restricted level of protein (91 vs 55% of National Research Council recommendations) on d 190 of gestation. Following parturition, calves were weighed, fed 1 liter of colostru...

A study was conducted to evaluate the short-term effects of feeding two dietary Se sources at various Se levels on the transfer of Se to the dam's milk and nursing pig. Six dietary treatments were arranged in a 2 x 2 factorial arrangement with two additional treatments in a randomized complete block designed experiment. Inorganic (sodium selenite) or organic (Se-enriched yeast) Se sources were ...