| PHOSPHOROUS DEFICIENCY IN LIVESTOCK OF JAMMU HILLS |
Rajiv Singh, R. K.Bharadwaj and M. S. Azad
Sher-e-Kashmir University of Agricultural Sciences F.V.Sc & A.H. , R.S.Pura-180112.
Introduction
Phosphorus is the second most abundant mineral in the body and shortage of phosphorus cause serious consequences for livestock production. It is essential for the development of bone and teeth. About 80% is found in the bones and teeth and the remaining is widely distributed in fluids and soft tissues of the body where it serves as range of essential functions. It is a component of nucleoprotein (DNA, RNA) and ATP with implications for mineral absorption, gluconeogenesis, fatty acid transport, amino acid and protein synthesis and activity of the sodium potassium pump.
The phosphorus content of the mature cow is about 2.8 kg i.e. about half that of calcium. The Ca:P ratio in the bone is 2:1. The concentration of phosphorus in muscle is 2-3 g phosphorus/Kg as compared to 0.1 g calcium/kg. Milk contains 1 g P/Kg and the Ca:P ratio in the milk is 1:1. There is no tight hormonal control of inorganic phosphorus concentrations in the blood stream and the serum values ranged widely above and below the renal threshold 2-3 mmol/l in healthy animals. Phosphorus is regulated along with calcium under the influence of hormone PTH, Vitamin D and CT. The kidney and gut (by the way of saliva) are both routes for excretion of phosphorus that is surplus to requirement.
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