Prediction of urinary and blood pH in non-lactating dairy cows fed anionic diets

Spanghero, M.

doi:10.1016/j.anifeedsci.2004.04.002

Cited by 21 publications

(20 citation statements)

References 25 publications

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“…Low DCAD diet (high Cl) might have overcome the ability of kidneys to excrete sufficient hydrogen ion to maintain a constant blood pH, resulting in a slight systemic acidosis. A high DCAD diet tends to have high blood pH due to more HCO − 3 production and H + excretion (Tucker et al, 1992;Spanghero, 2004). These findings were consistent with West et al (1991) who reported a decreased blood pH (7.32) in cows fed low DCAD diet compared to those (7.42) fed high DCAD diet.…”

Section: Blood Ph and Hcosupporting

confidence: 90%

“…Increased urinary pH with increased DCAD level might be attributed to higher blood HCO 3 and lower urine net acid excretion, implying that the acid load of the animals decreased rapidly as DCAD increased (Hu and Murphy, 2004;Spanghero, 2004). The alteration in urine pH that reflects alteration in blood pH and kidneys minimize this change by making the urine pH alkaline, by excreting more HCO 3 and conserving H + , or acidic, by excreting more H + and conserving more HCO 3 (Roche et al, 2003).…”

Section: Urinary Phmentioning

confidence: 91%

“…Waterman et al (1991) also reported increased anions (Cl or S) or decreased cations (Na and K) that reduced urine pH sharply. Moreover, a reduced urine pH with increased dietary anions (Cl and S) had been reported by many workers Jackson and Hemken, 1994;Pehrson et al, 1999;Spanghero, 2004). Urine pH had been used as an indicator of metabolic acid or alkali load (Sanchez et al, 2002).…”

Section: Urinary Phmentioning

confidence: 93%

“…Any change in DCAD induces certain changes in blood chemistry for example if DCAD decreases; it causes an increase in blood H + and decrease in blood HCO 3 , blood pH and urine pH (Block, 1994;Spanghero, 2004). The reduction in blood HCO 3 and urine pH works as a compensatory mechanism (Block, 1994;Sanchez et al, 1997).…”

Section: Introductionmentioning

confidence: 98%

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Nutrient intake, acid base status and growth performance of growing male buffalo calves fed varying level of dietary cation anion difference

2007

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Section: Blood Ph and Hcosupporting

confidence: 90%

Section: Urinary Phmentioning

confidence: 91%

Section: Urinary Phmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Nutrient intake, acid base status and growth performance of growing male buffalo calves fed varying level of dietary cation anion difference

2007

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“…4 (±0 . 81) on high and low DCAD treatments, respectively, and were consistent with the mean urine pH predicted from the meta-analysis of Spanghero et al (2004). However the difference in urine pH varied with time.…”

Section: Resultssupporting

confidence: 78%

Effect of a metabolically created systemic acidosis on calcium homeostasis and the diurnal variation in urine pH in the non-lactating pregnant dairy cow

Roche

Dalley²,

O’Mara

2006

Journal of Dairy Research

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Reducing the dietary cation-anion difference (DCAD) has been shown to be an effective means of preventing parturient paresis in confinement systems where cows are offered a total mixed ration containing DCAD-reducing mineral compounds (anionic salts). Such a supplementation strategy is not possible in cows being group fed forages precalving, and little is known about the effect of supplementing these cows with large amounts of anionic salts twice daily.Eight non-lactating, pregnant Holstein-Friesian cows were allocated to two levels of DCAD ( -20 and +18 meq/100 g DM) for 24 d, with an intensive Ca balance undertaken in metabolism stalls following a 2-week acclimatization to diet. The basal diet was 3 kg DM of crushed barley and 7 kg DM of pasture-hay. Urine and faeces were collected separately, weighed daily for 5 d and analysed for Ca content. Urinary Ca, creatinine and hydroxyproline concentration and plasma Ca concentration were determined during the period of the balance study. The diurnal pattern in urine and rumen pH was determined over 2 d. Decreasing DCAD reduced (P <0 . 001) the pH of urine, and increased (P <0 . 05) Ca absorption. Plasma Ca concentration was not affected by DCAD, and DCAD did not affect the output of urinary hydroxyproline, a marker of bone resorption. Twice-daily supplementation of anionic salts was sufficient to reduce the pH of blood and increase gastrointestinal Ca absorption. There was no diurnal variation in the pH of urine, suggesting that time of sampling to determine efficacy of DCAD in reducing systemic pH was not important.

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Effect of the racial group and body condition score at calving on production performance and metabolic profile of buffaloes during the transition period

Silva

Loiola

Filho

et al. 2023

Trop Anim Health Prod

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Prediction of urinary and blood pH in non-lactating dairy cows fed anionic diets

Cited by 21 publications

References 25 publications

Nutrient intake, acid base status and growth performance of growing male buffalo calves fed varying level of dietary cation anion difference

Nutrient intake, acid base status and growth performance of growing male buffalo calves fed varying level of dietary cation anion difference

Effect of a metabolically created systemic acidosis on calcium homeostasis and the diurnal variation in urine pH in the non-lactating pregnant dairy cow

Effect of the racial group and body condition score at calving on production performance and metabolic profile of buffaloes during the transition period

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