Cool Cows Make More Milk
COLUMBIA. MO Dairy
producers who keep their cows
cool during summer can boost
profits by several hujjdrpd dollars
a month, according to research by
University of Missouri-Columbia
dairy scientists.
“Our studies showed that
spraying each cow with one-half
gallon of water per hour and run
ning a fan that produced a
10-mile-an-hour breeze put cows
back in the comfort zone and
brought milk production back to
normal,’’ said Harold Johnson.
“In a 100-cow herd, that sort of
cooling program can boost milk
profits by more than $750 a
month.’’
University Extension dairy spe
cialist Baity Steevens said sum
mer heat stress can decrease milk
production 20 to 30 percent. Cows
produce less milk because they eat
less due to high body tempera
tures.” Also, their conception rate
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LANCASTER FORD
TRACTOR. INC.
The Counties Oldest Si Largest
Ford Tractor Dealer
1855 Rohrarstown Rd.
Lancaster, PA 17601
(717) 869-7063
drops considerably,’’ Steevens
said.
He said the normal body temp
erature of a dairy cow is 101.5
degrees Fahrenheit. When the cow
is under heat stress, that tempera
ture can hit 103 to 106 degrees.
“High producing cows have to
'dissipate approximately 1,600
kilo-calories of heat per hour
about 6,400 BTUs,” Steevens
said. “That’s a tremendous
amount of heat to shed through
radiation and respiration.
“A 100-cow herd, is giving off
640,000 BTUs an hour. That’s
about the same as having several
huge furnaces in your house.’’
Steevens and Johnson offer
these suggestions for keeping
cows cool:
—Provide shade. “We recom
mend giving each cow at least 50
square feet of shaded space,’’
Steevens said. Shade should be at
least 10 feet high and orientated
north and south.
In a Florida study when the out
side temperature was 102 degrees,
the temperature under a metal roof
with insulation was 86 degrees.
Under a sun screen with 90 per
cent blockage, the temperature
was 92.5 degrees; under a sun
screen with 70 percent blockage,
93.4 degrees. Sun screens cost
about 30 cents per square foot.
—Open the ridge of the bam.
“A number of dairy bams are hot
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a Better Breed Bacteria (r-iod
FOR ORGANIC WASTE DIGESTION
IN LAGOONS, PITS, PONDS, SEPTIC SYSTEMS.
A SCIENTIFICALLY ALTERED ORGANISM.
H really works in eating up the hard bottoms, crusty tops. Makes better non-stinky
manure. Destroys pond algae, clears the water. Please tell your town borough or city
officials. It is well proven for them, too..
It Is being overwhelmingly proven, year after year and farm after farm, that livestock
do so much better when the feed is grown naturally with the absence of chemicals.
Established customers have very low vet, drug and chemical bills. Some use herbi
cides but less than half of recommended amount, but alfalfa sprays are only bad his
tory. Our products have produced 90 bu. soybeans, 300 bu. com per acre, 27% pro
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crops - a live soil spray which also saves much fertilizer for only $8.25 per acre. Live
soil produces live crops. Live crops produce live cows. Live cows produce live
calves - a good cycle instead of a vlscious cycle whose serious consequences we
hear so much about from producer to consumer. Consumer demand is rising fast for
food that is fit for their families to eat. Wise farmers are preparing for the future.
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30th
217 S, Railroad Ave., New Holland, PA 17557
PH. 717-354-7064
Best time to call • around 7:15 to 8 a.m., to talk with owner, Ell StoNztus.
boxes unless we allow air move
ment,” Steevens said. A ridge cap
should be at least 12 inches above
the barn’s ridge to allow hot air to
rise and exit through the roof.
—Open the bam sides. Some
producers remove metal or wood
from the bam sides for summer
ventilation.
—lnstall large fans. “For every
20 to 30 cows, we recommend you
install one 36-inch fan that will
deliver 11,000 cubic feet per
ANOTHER HIGHLIGHT
Organic Center
Lancaster Farming, Saturday, June 3,1989-A37
minute,” Stcevens said.
—Use cool bedding. Sand is a
cool bedding material that reduces
the chance of mastitis-causing
bacteria. Steevens and Johnson
recommend 6 inches of clean,
washed sand for stalls. Sand
should not be used if you have a
liquid manure pump, because it
can ruin the pump.
—lnstall water sprinklers.
“Soak cows, don’t just fog
them,” Steevens said. A fine mist
does more harm than good by
creating a foggy, humid environ
ment.
He suggested installing a spray
nozzle about 8 to 10 feet above the
cow. These should be located in
drained cement areas near feed
bunks or the edge of the free stall
barn.