Lec 14 - Modeling Lactation Energy and Lysine Requirements Brian Richert and Allan Schinckel Energy Requirements Maintenance 80 of energy required

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Modeling Lactation Energy and Lysine Requirements Brian Richert and Allan Schinckel Energy Requirements Maintenance 80% of energy required for maintenance 15% for maternal wt. gain (lean and fat) 5% for products of conception Target weight gains (not including uterine and conceptus) Parity Gain, kg 1 30 2 25 3 25 4 20 5 15 6 10 Energy required Maintenance Kcal/day = 106 kcal/kg wt .75 ~ 106 Kcal x ((wt, kg x .2) + 13) i.e., 150 kg sow 13 + 0.2(150) = 13 + 30 = 43 43 x 106 = 4.56 Mcal ME/day Conceptus 0.2 Mcal ME/day Maternal gain Parity 1 target 30 kg 4.8 Mcal ME/kg gain 4.8 x 30 = 144 Mcal ME 114 days of gestation 144/114 = 1.26 Mcal ME/day Total 4.56 + 0.2 + 1.26 = 6.02 Mcal ME If diet contains 3.0 Mcal ME/kg, then 6.02/3 = 2.01 kg/day Note: Critical temp 18°C Warm floor 60 g more feed per day per 1°C drop effective in temperature Gain Natural wt gain is assumed to be 75% lean, 25% fat Target 30 kg gain Products of Conception 20 kg gain Maternal gain of 30 kg plus 20 kg of products of conception contain about 60% lean equivalent kg lean = 50 x 0.6 = 30 kg lean This lean contains 22% protein
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
.30 x 0.22 = 6.6 kg protein over 114 days of gestation, protein gain is 58 g/day Lysine Requirement 58 g protein contains 6.8% lysine Lysine required: 58 x 0.64 = 4 g lys/d Used with 50% efficiency, therefore supply 8 g/day Maintenance lysine requirement 50 mg/kg metabolic wt = 50 mg/(kg liveweight) .75 150 kg liveweight = 2.14 grams/day Total daily requirement 10.14 g lysine/day Amount of lysine fed affects weight gain and composition of gain Research results show that the composition of the diet affects weight growth and composition of
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/01/2012 for the course ANSC 443 taught by Professor Staff during the Fall '08 term at Purdue University-West Lafayette.

Page1 / 5

Lec 14 - Modeling Lactation Energy and Lysine Requirements Brian Richert and Allan Schinckel Energy Requirements Maintenance 80 of energy required

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online