Analysis of Feeds of Dairy Cattle in South Australia With Special Reference to the Calcium/Phosphorus Ratio

Rose, W. K.; Irving, Elizabeth A.; Hetherington, R.

doi:10.1111/j.1751-0813.1963.tb04313.x

Cited by 2 publications

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References 16 publications

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“…The reason for the failure of the pasture which contained apparently adequate amounts of P (~ 0.39% greater than the minimum recommended by Alderman I970), to supply sufficient phosphorus for the cattle is not known. Possibly it is related to the wide Ca/P ratio of 2-5.5: I as suggested by Webster (I932), Ford (1956), Hignett (I959), O'Moore (1950), Rose et al (1963), or to the low manganese concentration of 38-46 ppm (Wilson I966) or both (H ignett I959).…”

Section: Resultsmentioning

confidence: 95%

Effect of Adding Superphosphate to the Drinking Water on the Fertility of Dairy Cows

Dw¹

1979

Aust Veterinary J

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Mean serum inorganic phosphorus concentrations of cows in an infertile dairy herd of 170 cows in the Hunter Valley increased from less than 4.5 mg/100 ml to greater than 5.8 mg/100 ml after defluorinated superphosphate was added to their drinking water at the rate of 2.5 kg/450 1 once weekly from September, 1976. The first service pregnancy rate increased from 36.5% to 63.2%, the mean calving to conception interval decreased from 109 days to 85 days and the number of cows culled each year for infertility fell from 15 to 5. The pasture fed to the milking cows contained on average greater than 17% crude protein, greater than or equal to 0.39% phosphorus, greater than or equal to 9 ppm copper and 38--46 ppm manganese according to the dominant species. The Ca/P ratio ranged from 2 to 5.5:1. Of these, only the Ca/P ratio and the manganese concentrations appeared to be abnormal.

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Section: Resultsmentioning

confidence: 95%

Effect of Adding Superphosphate to the Drinking Water on the Fertility of Dairy Cows

Dw¹

1979

Aust Veterinary J

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Malnutrition and Infertility of Cattle in Australia and New Zealand

McClure

1968

Aust Veterinary J

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Analysis of Feeds of Dairy Cattle in South Australia With Special Reference to the Calcium/Phosphorus Ratio

Abstract: REPRINTS The scale of charges and other information regarding the supply of reprints were published in this Journal

Cited by 2 publications

References 16 publications

Effect of Adding Superphosphate to the Drinking Water on the Fertility of Dairy Cows

Effect of Adding Superphosphate to the Drinking Water on the Fertility of Dairy Cows

Malnutrition and Infertility of Cattle in Australia and New Zealand

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