From the Department of Dairy and Animal Science
Ihis regular eolunin from Penn State’s Department of Dairy and
Animal Science features the research findings, student opportunities, and
resports on other important topics generated in the Department. The
back issues of the column are arclmed on Lancustcr Farming's
' Internet vcicm 1 laiiiinlerfarmtng.com home page. Look fo- them.
Induced Lactation as a
Tool to Increase Dairy
Farm Profitability
By Ronald S. Kensinger
Department of Dairy &
Animal Science
Pennsylvania State
University
Piofitability on a dany (arm is
defined by the simple equation
Profit - (pnce/c\U of milk -
cost/cwt of milk) X volume
Reducing the cost of milk
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production offeis the most
piomismg oppoitumty toi dany
producers to mctease piofitability,
and has been the subject of recent
research within Penn State’s
Department ot Dany and Animal
Science in the College ot
Agucultuial Sciences Most dan>
producers realize theie aie a
limited number ot strategies to
mu ease the puce they aie paid
for milk 'the volume ot milk
produced per farm has steadily
increased in recent decades, and
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limited by land mass, null lent
management tegulations, and the
availability ol cows, facilities and
laboi Theietoie, conliolling the
cost ot pioduung milk plays a
significant economic lole at the
tai m
One factoi that mu eases cost
ot pioducmg milk is the
significant involuntary cull late
on the dairy lami This olten
occuis when otheiwise healthv
cows do not conceive m a timelv
way, and need to be culled bom
the held Options include
leplacmg them with heilers tiom
the farm, or purchasing a piegnant
heifei oi cow that is near calving
This (educes profits on the taim
and it is om goal to teduce this
cost
Dany pioduceis aie well awaie
that the primary reason to lebiecd
a cow is to gam the resulting call,
and to piepare the cow lot anothei
lactation It is the I relation that
has the greatest impact on
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pmtiiability, as most income
icsnlis tiom sale of milk Ihe
goal of mu icseaieh is to treat
those open lows m a matins■ that
a bnef "aitihual
pregnancy", m oidei to stimulate
ulluci dcU'lopn ■nl tnd induce
them to ha\e anodiei lactation
Ihe bib , methods m this
piocedme weu mlioduccd
veais ago In leseaich at Ohio
State I'nueisnv hut weie not
refined to the point of 1000
Pmthetmote, no
or oigam/ation
Lieates
success utc
company
attempted to take the method
through the process of approval
required by the U S bond and
Diug Administration (FDA)
FDA approval is essential rl a
technology like this is to be
widely used in the industry
Rcseaieh at Penn Slate
modified eailiei methods in terms
ol estrogen and progesterone (the
natural hormones of pregnanes)
administration In addition, we
utilized bSI fter the cows began
to produce milk Results weie
very encouraging as ihe induced
ell m
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Lancaster Farming, Saturday, November 27, 1999-Al5
cows piocluccd an avciage ot 60
pounds ot milk/dav toi da\s
i uithesmote, most ot these cows
which won pioblcm hiecdeis at
tne stall oi the tnal. conceived
dui.ng t!ie induced lactation
Thus, thee have letmned to the
icuulai held, and continue in be
piolliable animals
We then
computed llie
pi til itabiht ot letaming these
cows in the held to the alternative
ot laising leplacement heiteis
Results showed that the aveiage
dauy taim could met ease piolil
hy about 5520 ever> lime a cow is
induced to lactate lathci than
teplace hci with a heilei
Depending upon the size ol the
(aim, the impact could be \er>
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significant
In addition, \u_ hope to extend
our studies to determine it these
technologies can be applied to
voung hcitcis to get them
pioducitig milk earhei m then
lues and improve lifetime milk
pioduciion Since this procedtne
i. not aj piovcd h\ FDA, v\e must
(Turn to Page A 34)
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