The effect of gestation and lactation on bone calcium, phosphorus and magnesium in dairy cows

Beighle, D.E.

doi:10.4102/jsava.v70i4.782

Cited by 17 publications

(19 citation statements)

References 11 publications

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“…The mean P and Ca content of the cortical bone cores in this study was 178 and 316 g/kg ash, similar to the respective values of 164 and 335 g/kg ash observed by Beighle (1999). The P content of rib sections in this study, and of the whole bone sections in the study by Wu et al (2001) were very similar, with a reduction in bone P content (fresh basis and volume basis) observed with cows offered low P diets in both studies.…”

Section: Cow Fertilitysupporting

confidence: 89%

“…Immediately before the analysis, the specific gravity of the bone discs and bone crosssections were measured by weighing in air and in water, with specific gravity calculated as described by Beighle (1999). The oven DM (ODM) of the bone was determined by drying at 1008C for 36 h. Following acid digestion, bone P levels were determined using a Perkin Elmer Flow Injection Analyser (Model FIAS 300, Perkin, MA, USA), with the measurement of the resultant molybdenum blue complex conducted at 700 nm via a Perkin Elmer Lambda 2 Spectrophotometer.…”

Section: Health Monitoringmentioning

confidence: 99%

“…For example, while Brodison et al (1989) sampled tail bones, Beighle (1999) and Wu et al (2001) surgically removed rib biopsies. However, Beighle (1999) removed cores using a trephine, while Wu et al (2001) removed 20 cm rib sections. In common with Wu et al (2001), the twelfth rib was used as the sampling site in this study, the axial skeleton being sensitive to bone resorption and formation (Hill, 1962).…”

Section: Cow Fertilitymentioning

confidence: 99%

“…In addition, this permitted samples to be removed from cows at the end of the study without the need for slaughter. While Wu et al (2001) examined whole rib samples, comprising both cortical and trabecular bone, Beighle (1999) examined cortical bone only as the quantity of trabecular bone within ribs, and the number of P containing red blood cells, is variable. To allow data from this study to be compared with previous findings, both whole rib cross-sections (comprising both trabecular and cortical bone) and cortical bone cores were analysed.…”

Section: Cow Fertilitymentioning

confidence: 99%

See 3 more Smart Citations

Effect of offering dairy cows diets differing in phosphorus concentration over four successive lactations: 2. Health, fertility, bone phosphorus reserves and nutrient utilisation

Ferris

McCoy

Patterson

et al. 2010

Animal

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This experiment examined the long-term effects of offering diets containing low levels of dietary phosphorus (P) on dairy cow health, fertility and bone composition, and the effect of dietary P level on nutrient utilisation. One hundred winter-calving Holstein-Friesian dairy cows were offered diets containing either 'high' or 'low' levels of dietary P over a 4-year period. Rations offered during the winter included grass silage, maize silage (70 : 30 dry matter (DM) basis, approximately) and concentrates (10.0 to 12.0 kg/cow per day). During the summer periods in years 1 and 2, half of the cows grazed both day and night, while the remaining cows grazed by day, and were housed by night and offered grass silage. During years 3 and 4, all cows grazed both day and night during the summer period. Concentrate feed levels during the summer periods were 3.0 to 4.0 kg/cow per day. Different dietary P levels were achieved by offering concentrates containing either high or low P levels during the winter period (approximately 7.0 or 4.4 g P/kg DM, respectively) and during the summer period (approximately 6.8 or 3.6 g P/kg DM, respectively). Total ration P levels averaged 4.9 and 3.6 g P/kg DM for the high and low P winter diets, respectively, and 4.2 and 3.6 g P/kg DM for the high and low P summer diets, respectively. A total of 95, 70, 50 and 22 cows completed each of lactations from 1 to 4, respectively. Neither the incidence of lameness or mastitis, or milk somatic cell count, were affected by dietary P level (P . 0.05), while none of the fertility parameters recorded in any of lactations from 1 to 4 was affected by the dietary P level (P . 0.05). Dietary P level had no effect on the specific gravity, ash or calcium content of rib cortical bone cores (n 5 78 cows), while the P content of cortical bone (g/kg fresh, g/kg DM and mg/ml fresh bone) was lower with cows offered low P diets (P , 0.05). Dietary P level had no significant effect on the digestibility of either the DM, nitrogen, energy or acid detergent fibre fraction of the diet (P . 0.05), while faecal P excretions were reduced by a mean of 27 g/cow per day with cows offered the low P diets during the winter period. The results of this study indicate that dietary P levels can be reduced to proportionately 0.8 (approximately) of current UK feeding standards (Agricultural and Food Research Council, 1991), with no detrimental effect on dairy cow health or fertility, while having only minor effects on bone composition.Keywords: dairy cows, phosphorus, fertility, bone, nutrient utilisation ImplicationsThis study examined the impact of offering reduced phosphorus diets over a 4-year period on cow fertility and bone phosphorus status. Within this long-term study, no detrimental effects on either parameter was observed when a diet containing approximately 20% less phosphorus than recommended within the current UK feeding standards was offered. Offering a low phosphorus diet significantly reduced the quantity of phosphorus excreted in faeces.

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Section: Cow Fertilitysupporting

confidence: 89%

Section: Health Monitoringmentioning

confidence: 99%

Section: Cow Fertilitymentioning

confidence: 99%

Section: Cow Fertilitymentioning

confidence: 99%

See 2 more Smart Citations

Effect of offering dairy cows diets differing in phosphorus concentration over four successive lactations: 2. Health, fertility, bone phosphorus reserves and nutrient utilisation

Ferris

McCoy

Patterson

et al. 2010

Animal

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show abstract

“…The latter is estimated to be about 1.7-2.3 g/L, resulting in a mobilization of bone reserves of about 13% [10].…”

Section: Discussionmentioning

confidence: 99%

http://www.davidpublisher.org/index.php/Home/Article/index?id=32173.html

Benhizia¹,

Boudhene²,

Benayache³

et al. 2017

JPP

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Pregnancy, parturition, and lactation represent physiological changes of organism, which activates adaptation mechanisms dedicated to maintain homeostasis during peripartum period. Despite of the appropriate input of calcium and phosphorus, the homeostasis of phosphocalcic metabolism is sometimes faulty, in particular among animals with high production potential. The aim of this study is to define usual values of calcium and phosphorus during pregnancy and postpartum period. This paraclinic tool will serve to a good interpretation when used by veterinarians. A second goal is to study the influence of physiological stage on phosphocalcic metabolism in milch cow. The hereby study was conducted on 17 Prim' Holsteins cow breed from 3 to 5 years old, clinically healthy, multiparous and derived from two dairy farms located in the wilaya of Constantine. Blood samples were taken from the jugular vein using dry tubes at different physiological stages (early gestation, mid gestation, late gestation, pre-partum, one day after parturition, and one month postpartum). All of the samples correctly identified were transported to a specialized laboratory where specific kits were used. Blood calcium and phosphorus levels have significantly varied depending on physiological stage (p < 0.01). They showed a high pre-partum variation, with a rate of 94.71 mg/mL and 61.99 mg/mL, respectively. These results can be used as means of follow-up reproduction for a better management of dairy farming.

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