Swine nutrition

Question 1

what is a barrow

Answer 1

castrated male pig

Question 2

what is a gilt

Answer 2

young female pig not having produced her first litter

Question 3

what is the technical definition of a pig

Answer 3

less than 120 days old

Question 4

what is the technical definition of a hog

Answer 4

greater than 120 days old

Question 5

what is a weaner

Answer 5

young pig between 18-60d old

Question 6

what is an early weaned pig

Answer 6

pigs weaned at less than 21 days old

Question 7

swine gestation

Answer 7

115 days

Question 8

lactation time

Answer 8

18-25 days

Question 9

grow-finish

Answer 9

production phase from 60-260lbs (market weight)

Question 10

wean-to-finish

Answer 10

production phase from 10-260lbs

Question 11

nursery

Answer 11

production phase from weaning to 60lbs

Question 12

feeder pigs

Answer 12

40-60lb pigs sold for feeding to market weight

Question 13

market hogs

Answer 13

hogs weighing 240-280lbs, ready for slaughter

Question 14

production phases of the breeding herd (6)

Answer 14

• boar
• gilt development/pre-breeding
• breeding
• gestation
• farrowing/lactation
• weaning to rebreeding

Question 15

production phases of growing pigs (3)

Answer 15

• nursing sows/creep feeding
• nursery (3 phases)
• grow-finish (4 phases)

Question 16

what is adfi

Answer 16

average daily feed intake

Question 17

what is f/g or g/f

Answer 17

feed conversion = feed efficiency

Question 18

what is npd

Answer 18

non-productive sow days (time sows are not pregnant or lactating)

Question 19

what is npd goal

Answer 19

fewer than 50/female/year

Question 20

wean-estrus interval

Answer 20

days from weaning to rebreeding (4-7 days)

Question 21

farrowing rate

Answer 21

% of females mated that farrow (85%+)

Question 22

litters/sow/year

Answer 22

> 2.2

Question 23

aiao

Answer 23

all in all out production flow

Question 24

do gilts or barrows have higher amino acid requirements

Answer 24

gilts

Question 25

do gilts or barrows have greater lean growth potential

Answer 25

gilts

Question 26

do gilts or barrows consume more feed

Answer 26

barrows

Question 27

when do you start feeding gilts and barrows separate diets in split-sex feeding

Answer 27

at 80lbs

Question 28

what percentage of total cost of production is feed

Answer 28

65%

Question 29

what causes variability in nutrient requirements

Answer 29

• genetics
• gender
• health
• housing conditions

Question 30

limiting essential amino acids

Answer 30

• lysine
• methionine
• threonine
• tryptophan

Question 31

what macrominerals are supplemented (4)

Answer 31

• calcium
• phosphorus
• sodium
• chloride

Question 32

what microminerals are supplemented (6)

Answer 32

• Fe
• Cu
• Zn
• I
• Mn
• Se

Question 33

what are nursery diets composed of (6)

Answer 33

• lactose
• dried whey
• spray dried porcine plasma
• fish meal
• spray dried blood meal
• supranutritional levels of Cu (200ppm, 100x higher) or Zn (2000ppm, 20x higher)

Question 34

importance of spray dried porcine plasma

Answer 34

amino acids, passive immune protection

Question 35

when are pigs fed ad libitum v restricted

Answer 35

always ad libitum except in pre-breeding, breeding, gestation