EFFECT OF ORGANIC AND INORGANIC SOURCES OF CALCIUM AND PHOSPHORUS ON LAYING HENS PERFORMANCE | ||
| Journal of Animal and Poultry Production | ||
| Article 1, Volume 28, Issue 6, June 2003, Pages 4374-4385 PDF (603.72 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2003.244673 | ||
| Author | ||
| A. M. Ali, | ||
| Faculty of Agriculture Environmental Sciences, Suez Canal University | ||
| Abstract | ||
| Thte'e hundred White Bovans laying hens aged 24 weeks were used, to evaluate the effects of dietary organic and Inorganic sources of calcium ( Ca ) and phosphorus (P) on laying performanCe and egg quality. Hens were randomly divided into tour experimental treatments .. Thus four isocalorlc ( ME ; 2850 kcal (kg) and isonltrogenous (18 % CP) experimental diets were formulated, having equal Ca ( 40~. ) end available P ( 0.45% ) contentt . . Hens in ( Tr1 ) received 2.6% bone meal (B ) and 8.5% /im6stoM (lS); thosa in (Tr 2) received 2.6% BM and 8.5% eggshell me I (ESM ); those In (Tr 3) received 1.6% dicaJclum phosphate ( DCP ) and 9.5% LS ; SF those In (Tr 4) received 1.8% DCP and 9.5% ESM. The experiment was terminated I torty weeks of age. The obtained results revealed thaI. layers feed a diet contaning a comblnstioo of BM as a source of P and lS as a source of ca ( Tr1 ) , attained a beller performance fer of egg Production, and feed conversion compeared the oth r treatments . Means of egg weight. feed Intake and Haugh unit were not significan y affected by the dietary treatments. However, those layers feed a diet contaning a compination of DCP as a source of P and ESM as a source of Ca ( Tr 4 ) , achiaved the lowest performance tor egg production • and produced eggs of thinner she Is compared with nlhe other trealmentes . The highest values of nutrients dlgeslibdity and reteulion rates of Ca and P were oblalned with diets of (Tr1) and (Tr 3) , fallowed by Intermedicete values for (Tr 2) ,white that of (T( 4) gave the lowest ones. Generally . ihe consistent trends of egg production and shell thicltness show d beneficiat effects of BM: as an organic source of P, and LS: as an inorganic source of Ca : when being added to laying hen diets, in comparison with DCP a d ESM. | ||
| Keywords | ||
| Calcium; phosphorus; limestone; bone meal; dlcalcium phosphate; laying hen • egg productIon | ||
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