Influence of phytase on phosphorus utilization in broilers
| dc.contributor.advisor | Jalaludheen, A | |
| dc.contributor.author | Kanagaraju, P | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2019-04-06T05:47:09Z | |
| dc.date.available | 2019-04-06T05:47:09Z | |
| dc.date.issued | 1998 | |
| dc.description | PG | en_US |
| dc.description.abstract | An investigation was carried out utilizing 216 commercial day-old broiler chicks to evaluate the influence of supplementation of phytase enzyme on phosphorus utilization and subsequent performance. The birds were divided into six dietary treatment groups viz., standard broiler ration (T1) I broiler ration with 0.3 per cent available phosphorus (AP) (T2) I broiler ration with 0.4 per cent AP (T3) I standard broiler ration with 750 units of phytase per kg of feed (T4) I broiler ration with 0.3 per cent AP supplemented with 750 units of phytase per kg of feed (T5) and broiler ration ,with 0.4 per cent AP supplemented with 750 units of phytase per kg of feed (T6). Standard broiler ration was formulated as per BIS (1992) ) specifications. Initially, the ration with 0.3 per cent AP was formulated. By the addition of appropriate levels of dicalcium phosphate to this ration, diets with 0.4 and 0.5 per cent AP were formulated. The groups fed standard broiler starter and finisher rations with and without phytase and those fed rations containing an AP of 0.4 per cent supplemented with phytase had significantly (P<0. 01) higher body weights and body weight gain than other treatments. All enzyme supplemented treatments consumed significantly (P<0.0l) more feed (g/bird/day) than their respective unsupplemented groups except in the group offered 0.4 per cent AP. Significantly (P<0.01) superior feed efficiency was recorded in groups fed a diet having 0.4 per cent AP supplemented with 750 units of phytase per kg of feed. Phytase supplementation had a positive effect on tibial ash. Serum calcium and inorganic phosphorus (mg per cent) were significantly (P<0.0l) higher in enzYme supplemented groups than their respective counterparts at sixth week of age but were not influenced at eighth week of age. Bioavailability of calcium and phosphorus was significantly (P<0. 01) more in enzyme supplemented groups than their corresponding unsupplemented groups. Phosphorus excretion in the droppings I' (g/kg DM intake) was significantly (P<0. 01) reduced in enzyme supplemented groups. The per cent dressed yield and ready-to-cook yield were significantly (P<0. 01) higher in groups fed a diet having 0.4 per cent AP supplemented with phytase than other groups. The per cent giblet yield was significantly (P<0. 01) more in group fed a standard diet supplemented with phytase than other groups. The per cent livability was better with enzyme supplemented groups. The cost of production per kg live weight (when feed cost alone was considered) was cheaper in groups fed with 0.4 per cent AP supplemented with phytase. The net profit per kg live weight was 13 paise higher in groups maintained on 0.4 per cent AP supplemented with phytase compared to standard broiler ration. Based on the above findings it can be concluded that by the addition of 750 units of phytase per kg of diet I the available phosphorus level in broiler rations can be reduced by 0,1 per cent without affecting the overall performance. | en_US |
| dc.identifier.citation | 171333 | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810100637 | |
| dc.keywords | Poultry science, broiler chicken, broiler chicken-influence phosphate, broiler chicken-influence phytase | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Department of Poultry Science, College of Veterinary and Animal Sciences, Mannuthy | en_US |
| dc.sub | Poultry Science | en_US |
| dc.subject | null | en_US |
| dc.theme | Influence of phytase on phosphorus broiler chicks | en_US |
| dc.these.type | M.V.Sc. | en_US |
| dc.title | Influence of phytase on phosphorus utilization in broilers | en_US |
| dc.type | Thesis | en_US |