The Environmental Pollution Level with Excretory Phosphorus at Laying Hens In Romania

M. ROȘU, H. SÄ‚RÄ‚NDAN, A. JULA, R. SARANDAN, L. OGNEAN

Abstract


Experiments were realized using 6 hybrid Lohmann Brown Classic hens, grown individually inBPC 4 battery cages. Hans were fed with 5 different combined feed (NC) recipes, out of which 2commercial (NC 1 - 0,62% total phosphorus -tP and NC 2- 0,73% tP), and 3 experimental recipes (NC 3 -0,36% tP, with no phosphate but with phytase supplement; NC4 - 0,5 % tP with mono-sodium phosphatesupplement and NC 5- 0,5% tP with mono-calcium phosphate supplement). The excretion was measured for3 consecutive days and the tP content was determined, based on which, from the extremes difference, thedaily and yearly environmental pollution level with phosphorus was calculated for the total number ofRomania`s egg laying hens. The unjustified expression of 313,43 P tons per year, equivalent to 68,95 tonesof mono-calcium phosphate was concluded.

Keywords


pollution, environment, phosphorus, laying hens, digestibility

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DOI: http://dx.doi.org/10.15835/buasvmcn-vm:69:1-2:8465


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