The Effect of Phosphoric Acid Silage on the Acid-Base Balance in Dairy Cows

Lepard, O.L.; Pagé, Edouard; Maynard, L. A.; Rasmussen, Russel; Savage, E. S.

doi:10.3168/jds.s0022-0302(40)95587-4

Cited by 7 publications

(1 citation statement)

References 6 publications

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“…The pH of the urine from some animals fed the unneutralized silage was, however, as low as 5-0 which is the limit at which Brouwer (1961) considered an animal may suffer from an acid excess. The production of acid urine from sheep fed silage has been reported by Lepard et al (1940) and King (1943), but in their experiments the acid AGS 75 318 D. S. MOLEOD, R. J. WTLKINS AND W. F . RAYMOND urine could be attributed to the addition of inorganic acids during ensiling.…”

Section: Discussionmentioning

confidence: 91%

The voluntary intake by sheep and cattle of silages differing in free-acid content

1970

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SUMMARYThe free-acid content of grass silages was reduced by the addition of sodium bicarbonate to the silage and increased by additions of lactic acid. In each of four comparisons the addition of sodium bicarbonate to increase pH from about 4·0 to about 5·4 resulted in significant increases in intake of dry matter which ranged from 9·7 to 20·7%. Intake of organic matter was consistently increased by this partial neutralization treatment, but the increases were not significant in all experiments. The addition of sodium as sodium chloride rather than sodium bicarbonate did not alter the intake of a highly acid silage. Addition of lactic acid to reduce the pH of a silage feed from 5·4 to 3·8 resulted in a decrease in dry-matter intake of 22%. The correlation between dry-matter intake and the silage characteristics: titratable acidity, total organic-acid content, lactic-acid content and pH were all significant.It is concluded that the acids produced during the normal silage fermentation can limit the intake of the silage and it is suggested that chemical treatments to preserve wet grass without the presence or formation of large quantities of acids be investigated.

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Section: Discussionmentioning

confidence: 91%

The voluntary intake by sheep and cattle of silages differing in free-acid content

1970

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Preservation and Storage of Forage Crops

Musgrave

Kennedy

1950

Advances in Agronomy

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A study of the effectiveness of calcined magnesite as a neutralizing agent for hydrochloric acid in the diet of sheep

McNamara

L'Estrange

1975

Br J Nutr

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I . Five experimental diets were offered ad lib. for 21 d to five sheep in a 5 x 5 Latin-square design experiment as follows: pelleted grass meal alone (control); pelleted grass meal plus hydrochloric acid (470 mmol/kg dry matter (DM)) ; pelleted grass meal plus 470 mmol HCl/kg DM and either an equivalent amount of calcined magnesite (MgO) (235 mmol/kg DM) or twice the amount (470 mmol MgO/kg DM); pelleted grass meal plus 470 mmol MgO/kg DM. 2.MgO supplementation partly prevented the reduction in food intake caused by HCl, being more effective at the low than at the high level. When fed alone, the high level of MgO had a slight adverse effect on food intake.3. There was no significant treatment effect on either the p H or volatile fatty acid concentrations of rumen fluid. MgO supplementation was only slightly effective in preventing the metabolic acidosis caused by HC1 supplementation, as indicated by blood and urine acid-base measurements. 5. MgO supplementation altered the effect of dietary HCl on faecal calcium excretion and on the balance of Ca, but did not alter its effect on urinary Ca excretion.6. It is concluded that the beneficial effect of MgO supplementation on the intake of the HC1-treated diet was related more to its influence on dietary pH than on conditions in the rumen or the acid-base balance of the sheep.

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The Effect of Phosphoric Acid Silage on the Acid-Base Balance in Dairy Cows

Cited by 7 publications

References 6 publications

The voluntary intake by sheep and cattle of silages differing in free-acid content

The voluntary intake by sheep and cattle of silages differing in free-acid content

Preservation and Storage of Forage Crops

A study of the effectiveness of calcined magnesite as a neutralizing agent for hydrochloric acid in the diet of sheep

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