LactMgt 2-6-12

LactMgt 2-6-12 - ISU ISU Lactation Goals Minimize weight...

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1 ISU Lactation Management AnS 225 Spring 2012 ISU Lactation Goals Minimize weight loss or mobilization of fat and muscle stores Maximize pig survival and pig weight at weaning ISU Frequent Observation -- Know and understand “normal” and “abnormal” behavior Normal Lying on side Eager to eat at feeding Vocal during nursing – “talks to piglets” Changes sides Reacts to sounds, noises, handling of pigs Abnormal Lying on belly -- look for swelling, red, hard udder Assistance in getting up at feeding – listlessness Lack of appetite Marks on floor from extended periods without movement Squealing, thin piglets ISU Lactation Most demanding phase of the reproductive cycle Today’s sows produce up to 3 gallons (25 lbs.) of milk per day Daily nutrient requirements are 3X higher than in gestation Energy and nutrient requirements depend on: Sow’s weight Milk yield and composition Environmental conditions ISU Goals of Nutrition for Lactating Sows Maximize intake of the correct diet Match nutrient levels to the amount of feed that is consumed Maintain a reasonable feed cost per pig weaned ISU Metabolic Demands of Lactation are Tremendous It has been estimated that 75% of nutrients consumed are used for milk production during peak lactation Nutrient demands often exceed nutrient supplied in consumed feed Body tissues (protein and fat) are mobilized to meet metabolic demands Nutrient requirements for milk production are directly related to litter growth rate
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2 ISU Milk Production and Suckling Action Stimulation of udder through sucking results in prolactin and oxytocin release Prolactin: Milk synthesis Oxytocin: Milk letdown ISU Prolactin is released and causes milk synthesis for next nursing. Oxytocin is also secreted and causes stored milk release Physical stimulation of teat by pigs sends signals to the brain via sensory nerves Brain lobes and ducts gland cistern nipple or teat B. Flowers, NCSU ISU Environmental, rather than genetic constraints, usually limit milk production SO manage sows in lactation to maximize voluntary feed intake ISU 10 Number of Pigs Nursing 0 16 8 4 12 Milk Production (1bs) Environmental Constraints Genetic Limit ISU What Factors Affect Feed Intake?? Environmental Conditions Particularly HEAT Room temps, geographical area, season Young sows and overweight sows are more negatively affected by high temperatures Genetics High-lean lines have reduced appetites Parity Older parities have more capacity to ingest feed
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This note was uploaded on 02/14/2012 for the course ANS 225 taught by Professor Baas during the Spring '08 term at Iowa State.

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LactMgt 2-6-12 - ISU ISU Lactation Goals Minimize weight...

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