Studies on pellet binder, pelleting and enzyme supplementation on the performance of broilers fed diets containing barley, pearl millet and sunflower meal
| dc.contributor.advisor | Lohan, O.P. | |
| dc.contributor.author | Ahlawat, Mahesh | |
| dc.date.accessioned | 2017-08-05T04:32:29Z | |
| dc.date.available | 2017-08-05T04:32:29Z | |
| dc.date.issued | 2007 | |
| dc.description.abstract | The present study had been divided into three experiments. First experiment was conducted in laboratory to analyze the quality of pellets in term of pellet durability and hardness, while, other two experiments were conducted to evaluate the effect of replacing maize with barley and pearl millet and soybean meal with sunflower meal on broiler birds for the duration of 42 days each. In experiment I, pellet were prepared using molasses, sodium bentonite, guar meal, wheat, hydrated lime and a combination of molasses + hydrated lime as binder. Each binder was studied at two levels having three replicates of each. Pellet durability index and pellet hardness was significantly (P<0.05) higher in pelleted groups with various chemical and organic binders than control. Among binder highest PDI and hardness was in treatments having molasses + hydrated lime and followed by hydrated lime, sodium bentonite, molasses, guar meal and wheat as binder. In experiment -II, 320 commercial broiler chicks were randomly divided into eight treatments. Each treatment has two replications with 20 birds in each. The various treatments were T1 – control, T2- pellets without binder, T3- 2.5% molasses, T4- 2% sodium bentonite, T5- 2.5% guar meal, T6- 5% wheat, T7- 0.5% hydrated lime and T8- 3.5% molasses + 0.5% hydrated lime. Significantly (P<0.05) higher body weight gain, feed intake, feed efficiency and performance index were observed in treatments having 2% sodium bentonite and 2.5% molasses as binder than those of control, mash and pellets without binder group. Non significant difference was observed in groups having 0.5% hydrate lime as binder than that of control. DM metabolizability was not affected due to pelleting and source of binders. Nitrogen retention was significantly (P<0.05) improved in T2, T3 and T5 than that of T1 and was not affected in treatments T4, T6, T7 and T8 than that of T1. GE metabolizability was similar in different treatments. Dressed, eviscerated, giblet and drawn yield; thigh muscle and breast muscle composition, weights (% live weight) of heart, liver and gizzard were not affected by different treatments. Mortality (2.18%) was not related to dietary treatments. Broiler production was most beneficial when 2% sodium bentonite was used as binder and minimum profit was in treatment having 0.5% hydrated lime as binder. In experiment III, on the basis of results obtained in 2nd experiment 2% sodium bentonite was selected as binder. 640 commercial broiler birds were allotted to sixteen treatments having two replicates of 20 birds each. Rations for starter and finisher periods were formulated. Maize – Soybean meal based control ration (T1) was formulated to meet out the requirements of birds as per BIS (1992), other rations were T2- (T1+enzyme), T3- ( T1+ pelleting), T4- (T1+ enzyme+ pelleting), T5 (20% maize replaced with barley), T6 (T5+ezyme), T7 (T5+pelleting), T8 (T5+enzyme + pelleting), T9 (50% maize replaced with pearl millet), T10 (T9+ enzyme), T11 (T9+ pelleting), T12 (T9+ enzyme + pelleting), T13 (20% soybean meal replaced with sunflower meal), T14 (T13 + enzyme), T15 (T13+ pelleting) and T16 (T13+ enzyme+ pelleting). The present investigation indicated that the replacement of maize with barley at 20% level had no significant effect on body weight gain feed intake, feed efficiency, performance index and excreta moisture. However, DM metabolizability, nitrogen retention and GE metabolizability reduced significantly (P<0.05), while, intestinal viscosity significantly (P<0.05) higher in T5 than that of T1. Improved broiler performance was observed due to supplementation of enzyme in barley diet but not at a significant level, while GE metabolizability and intestinal viscosity improved significantly (P<0.05). Pelleting and supplementation of enzyme barley based pelleted diet improved body weight, feed efficiency, performance index, DM metabolizability, nitrogen retention, GE metabolizability and intestinal viscosity. Feed intake, carcass traits and carcass composition was not affected by dietary treatments. The replacement of maize with pearl millet at 50% level observed significantly (P<0.05) higher body weight gain and performance index, whereas, non significant effect on feed intake, feed efficiency and intestinal viscosity was found in between T9 and T1. DM metabolizability, nitrogen retention, GE metabolizability and excreta moisture reduced significantly (P<0.05) Enzyme supplementation and pelleting of pearl millet did not affected the overall performance of birds. DM metabolizability, nitrogen retention and GE metabolizability improved significantly (P<0.05). Intestinal viscosity improved significantly in enzyme supplemented diet and it was improved non significantly in pelleted diet. Enzyme + pelleting of pearl millet diet resulted in significantly (P<0.05) lower body weight gain, while feed intake, feed efficiency and performance index differ non significantly. DM metabolizability, nitrogen retention, GE metabolizability and intestinal viscosity improved significantly (P<0.05). Carcass traits and carcass composition was not affected by dietary treatments. Overall performance reduced significantly (P<0.05) when 20% soybean meal was replaced with sunflower meal. However, overall performance in enzyme supplemented, pelleted and enzyme + pelleted in sunflower meal diet observed non significant difference than sunflower meal mash diet. Replacement of 50% maize with pearl millet was found to be most profitable and was not economical when soybean meal was replaced with sunflower meal. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810027508 | |
| dc.keywords | Pelleting, Enzyme, Barley, Pearl millet, Sunflower meal, Broilers, Binders | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | LUVAS | en_US |
| dc.sub | Animal Nutrition | en_US |
| dc.theme | Studies on pellet binder, pelleting and enzyme supplementation on the performance of broilers fed diets containing barley, pearl millet and sunflower meal | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Studies on pellet binder, pelleting and enzyme supplementation on the performance of broilers fed diets containing barley, pearl millet and sunflower meal | en_US |
| dc.type | Thesis | en_US |