Poultry Feeding: Broiler Nutrient Requirements and Feed Enzymes (Part 3)
Explore “Broiler Nutrient Requirements and Feed Enzymes” in this Poultry Feeding lesson. Part 3 of the five-part series brings together the source material and lesson topics. Use the contents links to find a section, read the notes, and consult the complete original teaching slides below.
Lesson topics
- Feed Enzymes
- Coccidiostat
- Nutrient Requirements
- ME REQUIREMENT FOR BROILERS
- Body wt. of bird at start = 0.25 kg
Contents
- Read the original document
- Feed Enzymes
- Coccidiostat
- Nutrient Requirements
- ME REQUIREMENT FOR BROILERS
- Body wt. of bird at start = 0.25 kg
- Protein reqt.
- 7% of body wt.
- Feeding program for broiler
- Early Feeding
- Potential Benefits of Enzyme Supplementation
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Read the original source document
Concepts in Poultry Feeding: original teaching slides for this study series.
Feed Enzymes
Feed Enzymes Improve nutrient utilization Non-starch polysaccharidases (cellulases, pectinases, hemicellulases, arabinoxylanases and beta glucanases) release nutrients trapped in high fibrous diets Protease, amylase Microbial phytase – increases availability of phytate-bound P, Ca, Zn, Cu, CP and amino acids.
Coccidiostat
Coccidiostat Toxin binders or adsorbents activated charcoal, bentonites, zeolites, diatomaceous earth, glucomannan, live yeast, etc. Antioxidants, liver tonics, immunostimulants etc.
Nutrient Requirements
Nutrient Requirements NRC, 1994, BIS 1992 NRC std . may not be appropriate – management practices, genetic makeup, environmental temp., metabolic and behavioral characteristics, feedstuff qualities and dietary variables
ME REQUIREMENT FOR BROILERS
ME REQUIREMENT FOR BROILERS (Leeson and Summers, 2001) NEm = 83 x b.wt.0.75 MEm = NEm (82% of ME is NE) MEa = MEm x 0.5 ME growth = (Targeted wt. gain x 0.18* x 4.0**) + (Targeted wt. gain x 0.15# x 9.0$) 18% CP ** 4 kcal/g # 15% fat $ 9 kcal/g ME required, kcal/day = MEm + MEa + ME growth / no. of days in the period
Body wt. of bird at start = 0.25 kg
Body wt. of bird at start = 0.25 kg Metabolic wt. (W0.75) = 0.354 kg Wt gain anticipated = 120g Period in which the gain is anticipated = 7 days MEm = 83 x 0.354 = 35.8 MEa = MEm x 0.5 = 35.8 x 0.5 = 17.9 MEgrowth = (120 x 0.18 x 4.0) + (120 x 0.15 x 9.0) = 86 + 162 = 248 MEgrowth/day = 248/7 = 35.4 ME required/day = 35.8 + 17.9 + 35.4 = 89.1 kcal
Protein reqt.
Protein reqt. Body tissue contain 18% CP Dietary protein utilization is 61% Daily gain (g) x 0.18 Maintenance Endogenous N loss is 250mg/kg body wt. 250 x 6.25 = 1600mg protein/kg b wt./day 1.6g = 2.6g
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7% of body wt.
7% of body wt. CP content – 82% 0.07 x daily gain in Bwt (g) x 0.82 Total protein reqt. = growth + maint. + feathers
Feeding program for broiler
Feeding program for broiler 1.Maximum growth and feed conversion 2.Reduced cost formulation 3.Maximizing meat production Cobb (2003) Separate feeding Male and female are grown separately There is different requirement between sex especially amino acids Increase profitability
Early Feeding
Early Feeding Early access to feed: Stimulation of intestinal motility (Noy and Sklan, 1998) Increased body and organ growth Improved livability Immune function (Dibner et al., 1998) Carcass yields (Noy and Sklan, 1999) Early feed deprivation: Shorter villi and microvilli (Uni, 1999) Reduced muscle growth (Vieira and Moran, 1999) Reduced lymphocyte colonization (Dibner et al., 1998; Bar Shira et al, 2005)
Potential Benefits of Enzyme Supplementation
Potential Benefits of Enzyme Supplementation Increase feed efficiency Decrease gut maintenance cost Reduction in endogenous flow and enzyme production Improve performance Improve litter quality Improve bird uniformity May also lead to reductions in pathogenic microflora and improvements in bird health and welfare Decrease production costs!!!
Review questions and answers
What are the key points about Feed Enzymes?
Feed Enzymes Improve nutrient utilization Non-starch polysaccharidases (cellulases, pectinases, hemicellulases, arabinoxylanases and beta glucanases) release nutrients trapped in high fibrous diets Protease, amylase Microbial phytase – increases availability of phytate-bound P, Ca, Zn, Cu, CP and amino acids.
What are the key points about Coccidiostat?
Coccidiostat Toxin binders or adsorbents activated charcoal, bentonites, zeolites, diatomaceous earth, glucomannan, live yeast, etc. Antioxidants, liver tonics, immunostimulants etc.
What are the key points about Nutrient Requirements?
Nutrient Requirements NRC, 1994, BIS 1992 NRC std . may not be appropriate – management practices, genetic makeup, environmental temp., metabolic and behavioral characteristics, feedstuff qualities and dietary variables
What are the key points about ME REQUIREMENT FOR BROILERS?
ME REQUIREMENT FOR BROILERS (Leeson and Summers, 2001) NEm = 83 x b.wt.0.75 MEm = NEm (82% of ME is NE) MEa = MEm x 0.5 ME growth = (Targeted wt. gain x 0.18* x 4.0**) + (Targeted wt. gain x 0.15# x 9.0$) 18% CP ** 4 kcal/g # 15% fat $ 9 kcal/g ME required, kcal/day = MEm + MEa + ME growth / no. of days in the period
What are the key points about Body wt. of bird at start = 0.25 kg?
Body wt. of bird at start = 0.25 kg Metabolic wt. (W0.75) = 0.354 kg Wt gain anticipated = 120g Period in which the gain is anticipated = 7 days MEm = 83 x 0.354 = 35.8 MEa = MEm x 0.5 = 35.8 x 0.5 = 17.9 MEgrowth = (120 x 0.18 x 4.0) + (120 x 0.15 x 9.0) = 86 + 162 = 248 MEgrowth/day = 248/7 = 35.4 ME required/day = 35.8 + 17.9 + 35.4 = 89.1 kcal
More lessons from this document
- Concepts in Poultry Feeding — Part 1
- Concepts in Poultry Feeding — Part 2
- Concepts in Poultry Feeding — Part 3
- Concepts in Poultry Feeding — Part 4
- Concepts in Poultry Feeding — Part 5
Conclusion
The important points in Feeding program for broiler should be reviewed alongside the definitions, examples and comparisons given above. Continue with the other four articles to cover the rest of the source material.