Effects Of Feed Enzyme Preparation On The Production Performance And Phosphorus Availability In Laying Breeder Hens

This trial was conducted to study the effects of feed enzyme preparation on the production performance and phosphorus availability in laying breeder hens with Enzyme ALLZYME SSF, which contained phytase, protease, amylase, cellulase, β-glucanase, pectinase, and xylanase. Nine hundreds and seventy-two 24-wk-old Roman brown parent-breeding layers were randomly allocated to 3 treatments with 6 replicates and 54 birds each replicate. Three treatments were positive control groups, negative control groups and enzyme addition groups. The positive control diets were based on maize and diverse meals with 0.40% non-phytate phosphorus and no enzyme Preparation. 1.15% Di-calcium phosphate in the positive control diets were substituted by 0.70% 1 imestone and 0.45% zeolite to form the n egative c ontrol diets with 0.18% non-phytate phosphorus and no enzyme Preparation. The enzyme addition diets were formulated by the addition of 200g/ton ALLZYME SSF to the negative control diets. All other nutrient levels were same. The trial was continued for 18 weeks. Results showed that the production and reproductive performance of laying breeder hens had no difference significantly (P>0.05). Dietary treatments had no effects (P>0.05) on tibia development and eggshell quality. However, the yolk color of egg and crude protein availability in laying hens fed the SSF diet was improved significantly (P<0.05), and the phosphorus availability was improved markedly (P<0.01). The addition of 200 g Allzyme SSF per ton to replace 75% di-calcium phosphate in breeding layers diets can reduce feed costs and improve economic efficiency of laying breeder hens with no adverse effects on production and breeding performance.