Unit 6: Swine Feeding
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Transcript Unit 6: Swine Feeding
Unit 6: Swine Feeding
Unit 6: Swine Feeding
Identify and discuss swine feeding
options throughout various life stages
Understand specific nutrient needs
and possible additives
Knowledge of swine feeding systems
Unit 6: Swine Feeding
The Breeding Herd
The Boar
Protein requirements
50-125# - 18% CP
125-200# - 16% CP
Mature boars – 14% CP
>180# - reduce ration energy content
Add fiber
Include more alfalfa meal
Replace corn w/ oats
Limit feed
Unit 6: Swine Feeding
Nonbreeding season
10-14d prior to breeding
4-6# of feed/d of 12-14% ration
Increase feed amount by 50%
Hold good condition w/out overconditioning
Sow Herd
Be aware of reproductive stages and the
protein requirements for each
Pregestation
Usually – replacement gilts raised to 225-275#
Unit 6: Swine Feeding
Allows for full genetic expression
Full-fed grow/finish diets
At 225+#, selection of replacements and separated
from the market herd
Restrict dietary energy intake to 60-75% of
previous diet
Allows for more body growth, but restricts fat
deposition
Breeding
Gilts
Should weigh 250-300#
6-7 mos. Old
At least 2-3 estrus cycles
Unit 6: Swine Feeding
Flushing – increase energy intake prior to and
during breeding – improves health, ovulation
rate, increased live embryos
Sows
Bred at first estrus after weaning
High-energy lactation diet for last 2-5 wks,
reduce feed intake at weaning
Some producers restrict all feed and water
intake 24 hrs after weaning to help stimulate
return to estrus
Gestation
Restricted energy intake to limit fattening
Excess fat impedes reproductive performance
Unit 6: Swine Feeding
12-14% CP diet, 5500-6500 kcal ME/d
Can also increase dietary fiber, or interval feed
(full feed every third day)
Last third of gestation
Increase daily feed intake of gilts
Keep sows at same feeding rate
Wt. gain during gestation
Sows ~50#
Gilts 75-100# from breeding through farrowing
Farrowing
Increase dietary fiber to reduce constipation risk
3-5d prefarrowing to 3-5d postfarrowing
Unit 6: Swine Feeding
Some producers will feed the same diet and
restrict intake, others will feed ad libitum
Lactation
May increase feeding level after farrowing to
meet needs for energy and milk production
13-16% CP diet high in energy, low in fiber
4-5#/d base, plus 1#/nursing pig
Antibiotics if necessary
Fat may be used to increase caloric density –
increases energy density of milk, improves
piglet survival, heavier litter wts, reduced sow
wt loss
Unit 6: Swine Feeding
Piglets should consume colostrum w/in 72 hrs
of birth for immune function
Piglets may need supplemental iron either
orally, or by injection from 3 days of age until ~3
wks
Early weaning (<21d) can increase rates of
gain, lean meat production, carcass quality, etc.
Unit 6: Swine Feeding
Feeding the Market Pig
Protein
Maybe the most critical nutrient in swine
rations
Amino acid balance is more important than %
CP
Common limiting AA in swine diets
Lysine, tryptophan, threonine, methionine
Needs vary w/ age and wt of the pig
Unit 6: Swine Feeding
Types of Diets
Milk replacer diets
Not widely accepted
Tend to be expensive and difficult to manage
Prestarters (20-24% CP)
Fed to early wean pigs <3 wks old
Can also fortify diets for pigs not receiving enough
milk
Usually contain some amount of milk protein,
antibiotic, fat, and sugar
Pellet or crumble form
Unit 6: Swine Feeding
Starters (18-20% CP)
Complete feed ration fed from 3-6 wks of age
Can be used as a creep ration before weaning
Fed until ~40#
Include appropriate antibiotic
½ of grain should be corn
Grow-Finish Diets
Grower diets (14-16% CP)
Fed from 40-120# wt
Typically a corn/SB diet fortified w/ min/vit and
antibiotics into a complete diet
Unit 6: Swine Feeding
Finisher diets (13-14% CP)
Fed from 120# to market
Antibiotic level is optional
Dietary Feeding Systems
Simple vs. Complex diets
Simple diets fed to older pigs
Consist of corn, SBM, min/vits
Complex diets more appropriate for younger
pigs
May contain milk proteins, medications,
byproducts, etc.
Unit 6: Swine Feeding
Complete vs. Free-Choice Diets
Complete diets
Have the entire diet mixed into one presentation
form
Recommended for grow/finish diets
Easily automatic fed
Control nutrient intake (no sorting)
Faster gains
Free Choice diets
Pigs can choose to eat two or more ingredients at
free will
Requires more management of diet (palatability,
etc.)
Unit 6: Swine Feeding
Can be expensive and poor performing if not
managed properly
Full Feed vs. Limit Feed Diets
Grow/finish pigs
Full feed allows them to express their full genetic
potential
Weight gain
Feed efficiency
Limit feeding is harder to justify for the increased
management it requires
Limiting the pig to a intake level lower than what
they would voluntarily consume
Unit 6: Swine Feeding
Gilts & Sows
Replacement gilts should be on full feed until the
reach their heaviest lean growth potential
Until ~250# on full feed
Limit feed from then until breeding
Gestating gilts and sows
Should be limit fed to prevent overconditioning
Sows should be limit fed immediately after
weaning
Individual feeding – measured amount of feed
to each sow, fed in individual pens, crate, etc.
Unit 6: Swine Feeding
Group feeding – measured amount of feed to a
group of sows, can result in aggressive sows
consuming more than timid sows
Interval feeding – allow them to have full feed
every third day, reduces labor required for hand
feeding, reproductive performance tends to be
the same as limit feeding
Dry vs. Liquid Feeding
Mixing water w/ the diet
Rate of gain is the same
May be beneficial in young pigs
Unit 6: Swine Feeding
Freshness is a problem w/ wet feeds
Can spoil and develop off flavor quickly
May be hard on feeding system and labor
Meal vs. Pelleted Diets
Reduces waste
Less storage required
Better control of nutrient intake (each bite is
the same)
Improved palatability and feed intake
Higher cost compared to meal form
Unit 6: Swine Feeding
May improve availability of some nutrients
May improve ADG by 5% and feed efficiency
by 10%
Very appropriate for complete diets
High-Moisture vs. Dry Corn
High-moisture corn can be used w/ no
difference in production
HMC is difficult to store and handle in swine
systems
Pig may have trouble consuming the proper
amount of corn and supplement
May over- or undereat either ingredient
Unit 6: Swine Feeding
Feed Processing
Processing should be based on ingredients used
and the handling system
Poorly processed feeds can cause poor
performance
Particle size variation
Inadequate blending
Sorting
Health problems
Poor feed utilization
Unit 6: Swine Feeding
Grinding or Rolling
Most common processing method
Relatively inexpensive, and easy to justify
economically
Either hammer or roller mill
Measure fineness by microns
Uniform grind produces uniform mixing and
consumption
Feed efficiency improves as grind becomes
finer
Unit 6: Swine Feeding
Too fine can cause palatability problems, handling
problems, dust, gastric ulcers
Growing pigs
Breeding herd
650-750 microns
750-900 microns
Pelleting
Improves growth rate and feed efficiency
Reduces dust, storage space, ingredients needed on
the farm, feed waste
Also destroys most feed borne pathogens
Unit 6: Swine Feeding
Can be expensive, increase incidence of
gastric ulcers, pellet quality can be hard to
maintain
Heat Processing
Can improve nutrient availability in some
feeds
Time and temperature of processing is key
SBM is most effective when heat treated
Unit 6: Swine Feeding
Feed Ingredients for Swine Diets
General
Too many too list
Corn is the energy basis for most all diets in
the U.S.
What other ingredients are used?
Protein sources tend to be SBM, and an
animal protein source
Unit 6: Swine Feeding
Important supplemented macros
Most likely to be deficient micros
Fe, Cu, I, Se, Zn
Likely deficient vitamins
Ca, P, Na, Cl
Riboflavin, niacin, pantothenic acid, B 12, A, D (E,
K under some circumstances)
Misc. Feeds for Swine
Whole SB
No difference in performance found when used in
gestation & lactation diets
Unit 6: Swine Feeding
Reduced performance in growth/finishing diets
Heated treated SB
Can add a lot of fat to the diet
Reduces protein concentration of the SB
Fats or Oils
Tallow or vegetable oils, or blended fats (restaurant
or processing byproducts
Little performance difference in types of fats
Cannot add >7% due to handling problems
Can reduce dust
Unit 6: Swine Feeding
Growing pigs
Each 1% added fat increases feed efficiency by
2%
>2% = little effect on backfat thickness, >3% will
slightly increase backfat thickness
Response greater in warm temperatures
Gestation & Lactation
Increases fat content of colostrum
Increase piglet survival 2-3% (in herds w/ <80%
survival rates)
Little effect on litter size, BW, WW
Minimum of 7.5% needed 10-14d prefarrowing
to induce a response
Unit 6: Swine Feeding
Dried Skim Milk & Dried Whey
DSM – 8% moisture, 32-35% CP
DW – 11% CP, 61% lactose
Valuable for milk replacers and starter diets
Readily digested
10-30% inclusion in starter diets 10-30d
postweaning
Spray Dried Plasma Protein
Blood proteins
78% CP
Can have antibody effect
Stimulates feed intake at 4-7% inclusion 7-10d
after weaning
Unit 6: Swine Feeding
High Lysine Corn
Normal yellow corn = .2% Lysine
HLC = .55% Lysine
Can save substantial amounts of SBM in the diet
Must determine amount of lysine in the corn
Balance for lysine requirement rather can CP
Synthetic AA
Higher AA requirement rather than just protein
Can replace SBM in the diet if cost is too high
Lysine – first limiting AA, Tryptophan (Corn-SBM)
or Threonine (milo-SBM) – second limiting AA,
Methionine tends to be the next limiting AA (2nd in
HLC diets)
Unit 6: Swine Feeding
Feed Additives
May improve efficiency, acceptance, health,
metabolism
Can increase meat production by 15%
May help produce a safer, higher quality product
Antimicrobial drugs
Improve health and performance
Aid in animal’s ability to withstand stressors
Usage must comply w/ FDA regs
Anthelmintics
Controls internal parasites
Unit 6: Swine Feeding
May be fed periodically or continuously
Copper Sulfate
3-11 ppm inclusion to meet growth requirement
125-250 ppm – works as a growth promoter and
has similar effect as antimicrobials
Can be toxic at >250 ppm
Drawbacks – corrosion of galvanized metals,
decreased bacterial degradation in lagoons
Antioxidants
Prevent deterioration of some nutrients during
storage, and reduce oxidative reactions in
animal tissues (spares vit E, Se)
Unit 6: Swine Feeding
Probiotics
Increases amount of desired GI microbes
Lactobacillus, Bacillus subtillus, Streptococcus
faecium, yeast
Reduce E. coli
Produce more antibiotic substances
Reduce GI toxicity levels of some substances
Organic Acids
Used in postweaning pig diets to increase ability
to digest carbos and proteins
Response is variable
Unit 6: Swine Feeding
Enzymes
May help digest substances the pig cannot by
themselves
Can help improve digestibility of some nutrients
or compounds in the diet (P, Barley)
Flavoring Agents
Increase acceptance of a low palatability diet
Increase intake under normal and stress
conditions
Mold Inhibitors
Prevent mold growth in stored feeds
Mold reduces palatability and may increase risk
of mycotoxins
Unit 6: Swine Feeding
Pellet Binders
Reduce pellet breakdown
Reduces refusal
Sodium bentonite
Zinc
High levels of SBM ties up dietary Zn
Diets must be fortified w/ Zn to prevent
parakeratosis
Unit 6: Swine Feeding
Miscellaneous
Confinement Rearing
More reliable production than traditional
systems, especially in grow/finish situations
Gestating sows may use pasture the most
efficiently
Still requires grain supplementation
May reduce some health risks associated w/
confinement (except what?)
Unit 6: Swine Feeding
Nutrient & Environment Interaction
Floor space/pig has some effect on gain, but
it decreases w/ age
Interactions w/ environmental temperature
Nutrient requirements of Swine
See tables 7-2 through 7-5