
TY  - JOUR
A1  - Tomas, FM 
A1  - Moir, RJ 
A1  - Somers, M 
T1  - Phosphorus turnover in sheep
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1967
VL  - 18
IS  - 4
SP  - 635
EP  - 645
KW  - 
UR  - https://doi.org/10.1071/AR9670635 
N2  - Rumen fluid, serum, and parotid salivary inorganic phosphorus concentrations in sheep given four levels of dietary phosphorus (0.42&ndash;4.02 g/day) were directly related to phosphorus intake. There was a very high correlation (r = +0.91; P < 0.001) between inorganic phosphorus concentrations in centrifuged rumen fluid and in parotid saliva. Serum inorganic phosphorus concentrations were positively correlated with those of saliva (r = +0.64; P< 0.05) and also with those in centrifuged rumen fluid (r = +0.75; P<0.01). The range in the mean daily saliva volumes collected from one parotid gland in each sheep was 3.2 to 4.2 l/day. The calculated minimum total salivary phosphorus secretion ranged from 3.0 g/day on the lowest dietary phosphorus intake to 5.3 g/day on the highest, the corresponding ratios of salivary to dietary phosphorus being from 7.24 to 1 .32 g/g. It appeared that salivary phosphorus was the major source of phosphorus to the rumen, and was also the principal determinant of rumen fluid inorganic phosphorus levels. 
ER  -

