Title: Dairy update
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00087054/00012
 Material Information
Title: Dairy update
Series Title: Dairy update
Physical Description: Serial
Language: English
Creator: Institute of Food and Agricultural Science
Publisher: University of Florida Institute of Food and Agricultural Science
Place of Publication: Gainesville, Fla.
Publication Date: Spring 2005
 Record Information
Bibliographic ID: UF00087054
Volume ID: VID00012
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.


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Department of Animal Sciences

9airy Update


Quarterly Newsletter Vol. 5 No. 2 Spring 2005


The 42nd Florida Dairy Production Conference will
be held at the Hilton University of Florida Conference
Center, located at 1714 SW 34th Street, Gainesville on
Tuesday May 3rd, 2005 from 10:00 AM 4:45 PM

Tuesday, May 3, 2005, Century Ballroom
9:15 AM Registration
Presiding Dr. Glen Hembry, UF Animal Sciences, Chair
10:00 Welcome Dr. Glen Hembry
10:05 Frequent Milking in Early Lactation:
Considerations for Implementation- Dr. Geoff
Dahl, Department of Animal Sciences, University
of Illinois, Urbana, IL
11:00 Crossbreeding: Why the Interest? What to
Expect Dr. Les Hansen, Department of Animal
Science, University of Minnesota, St. Paul, MN
11:45 Luncheon
Presiding Mr. Brent Broaddus, UF Dairy Extension
12:45 PM Awards
1:00 The State of IFAS Dr. Jimmy Cheek, Senior
V.P. Agriculture and Natural Resources, University
of Florida, Gainesville, FL
1:15 How to Make the Most of My Multicultural
Workforce -Dr. Miguel Morales, Monsanto Dairy
Business, CA
2:00 Reducing Variability in Your Breeding Program
Using a Systematic Approach
Dr. Richard Wallace, Department of Veterinary
Clinical Medicine, University of Illinois, Urbana, IL
2:45 Refreshment Break
3:15 Let There be Light: Photoperiod Management of
Cows for Production and Health Dr. Geoff
Dahl, Department of Animal Sciences, University
of Illinois, Urbana, IL
4:00 Update: Barn Cooling, Tunnel and Otherwise -
Mr. DavidBray, Department of Animal Sciences,
University of Florida, Gainesville, FL
4:45 Adjourn

Registration Information
Registration for the Dairy Production Conference
includes the program, one copy of the proceedings,
refreshment breaks, and the luncheon. The early
registration fee is $65 for fees postmarked on or before
April 22, 2005. The regular registration fee is $80 for
fees postmarked after April 22, 2005, or at the door. To
register, please visit the UF/IFAS Dairy Extension
website http://dairy.ifas.ufl.edu.

Intervet Inc. $65 Early Registration Offei
for Florida Dairy Producers

Dale Hayes of Intervet Inc., Gainesville, offers Florida dairy
producers $65 off their next purchase of Intervet Animal
Health Products purchased from an Authorized Dealer if
they register early (on or before April 22, 2005). Florida
dairy producers will receive a certificate of appreciation at
the registration desk on May 3rd which may be used to obtain
the $65 value of Intervet products. Limited to one offer per
Florida dairy farm. This offer equals one free registration
per Florida dairy farm to attend the Florida Dairy Production
Conference on May 3rd, 2005!

In addition to free registration for the conference
program, sponsors may submit educational and product
information for inclusion in a packet for all registrants.
For more information regarding sponsorship, please visit

Hotel Accommodation
A block of rooms is being held at the Hilton for
Dairy Production Conference participants. The group
rate is $79 per night plus 9.25% tax. To qualify for this
special rate, reservations must be made on or before
April 14, 2005. Call the Hotel directly at (352) 371-
3600 and be sure to mention that you are attending the
Dairy Production Conference and group code "CDP" to
receive the group rate. After the deadline, the
discounted group rate and guest room availability are no
longer guaranteed. For directions to the Hilton visit

More Information
Albert de Vries (Conference Information)
UF/IFAS Department of Animal Sciences
Phone: (352) 392-7563, E-mail: devries(,animal.ufl.edu

Kim Brand (Conference Registration)
UF/IFAS Office of Conferences and Institutes
Phone: (352) 392-5930, E-mail: khbrand@mail.ifas.ufl.edu


A PCDART workshop will be held on Wednesday
May 4th, 2005 from 9:00 AM 12:00 noon in
conjunction with the Dairy Production Conference.
Location: Hilton University of Florida Conference
Center (Dogwood Room), 1714 SW 34th Street,
Gainesville. The workshop will be led by Dr. Richard
Wallace, Department of Veterinary Clinical Medicine,
University of Illinois, Urbana, IL and Dr. Dan Webb,
Department of Animal Sciences, University of Florida,
Gainesville, FL.
Advance registration is requested since space is
limited. Please email dore(aanimal.ufl.edu or call (352)
392-5592 by April 30th, 2005. For more information
about the PCDART workshop, contact Dan Webb,
UF/IFAS Department of Animal Sciences, e-mail:
webbC(animal.ufl.edu, phone: (352) 392-5592, fax:
(352) 392-5595.


The 54th Annual Beef Cattle Short Course will be
held at the Hilton UF Conference Center, Gainesville,
Florida on May 4-6, 2005. The theme is "Maintaining
Quality Production in a Dynamic Market Place". For
more information, visit http://www.animalufl.edu.

Detection and Management of Open Cows
APRIL 25-26,2005

The objective of this workshop is to inform and train
Spanish-speaking employees on dairy farms in the
appropriate use of modem reproductive management
technologies and strategies. Topics will include estrus
synchronization and timed insemination, discussion of
strategies for detection and re-synchronization of open
cows, application of ultrasonography and rectal
palpation for detection of non-pregnant cows. The goal
is to prepare employees for greater service with the
herd's veterinarian in order to achieve optimal
reproductive performance. The program will include
training on the Easi-Scan Ultrasound.
Instructors are:
Julian Bartolome, DVM, University of Florida,
Department of Animal Sciences and Facultad de
Ciencias Veterinaria UNLPam, Argentina.
Carlos Risco, DVM, Professor, University of
Florida, College of Veterinary Medicine.
Jan MiL I, ', DVM, Professor, University of
Florida, College of Veterinary Medicine.

For more information on the Spanish Herdsman
Seminars, contact Jan or Leslie Shearer,
iks(,ifas.ufl.edu or (352) 392-4700 ext 4112, or visit


David R. Bray

One of the big problems for animal agriculture is
that its opponents, the anti-animal organizations, ignore
science and use rumors or inaccurate information to get
their point across. A letter today to the local newspaper
indicated that baseball was in big trouble because of
steroid usage by its players. The last statement in the
letter was, "if you don't like steroids, stay away form
beef and dairy products because they are full of them."
There always seems to be a story on T.V. or in the
newspaper about all the evil things these "factory farms"
are doing to our environment. Florida dairymen have
spent countless millions of dollars to preserve the state's
water quality and are spending more to develop and
implement management systems to further their efforts
in preserving water quality. All we read or see in the
news are people ranting that the neighboring dairy will
pollute their well.
It has been all about water quality in Florida up to
this point in time, but now dairymen are being
introduced to the new EPA air emission agreement.
Who knows what joy this will bring to the dairymen?
This is not an odor issue but an air pollution issue from
livestock operations. How this will affect dairymen is
yet to be seen, but it smells like lawyers, TV. cameras,
uproars from the anti-animal crowd, and probably a big
sucking sound from your wallet.
These organizations have lots of money and lawyers.
American agriculturists must do a better job in educating
the American public about animal agriculture focusing
on scientific data about the issues. If you think how a
cheese plant was forced to change how their dairymen
produce milk, or how chickens are raised to sell to
McDonalds, these people have lots of money, time, and
determination. Again, in these situations, science was
ignored and mob rule was the answer.
Now we come to milk quality. I have never seen a
newspaper article or T.V. coverage about milk quality.
It has been a non-issue, off the radar screen except for
NMC. Since 1998 they have been trying to get NCIMS
to reduce the somatic cell count (SCC) limit from
750,000 cells/ml to 400,000 cells/ml. NCIMS has not
done this because the present limit is not a human health
problem. NMC's first reason was everybody else did
this, and we can't compete on the world market if our
SCC limit is not reduced to 400,000 cells/ml, like
Europe's limit. Guess what? We will never compete on
the world market on a large scale. Every beef cow in the
US does not need to grade choice for US to sell beef to

Japan; every bulk tank of milk in the US does not need
to be at 400,000 for folks in the North to sell dairy
products to Europe. NMC leaders are well meaning
people who seem to be college professors who don't
own cows, veterinarians who don't own boots or
coveralls, and allied industry people. They have ignored
all science and have tried to find anything they can to get
their point across. NMC has every right to do what they
have done, but I find it hard to believe that any
organization connected with the dairy industry would try
to impose more regulation on our nation's dairy farmers.
Will this mean that these college professors and science
trained people will ignore all science and determine that
water quality regulation or air emissions should be
lowered when available science says otherwise? The
only benefit I can see for lowering the SCC to 400,000 is
for the processors in the North, because once the limit
drops to 400,000 no bonus money will be paid to those
dairymen because the cheese makers can make high
yielding cheese without paying for it. Again the big
loser will be the dairymen. Every dairyman's goal
should be to produce the highest quality possible; but he
also needs to make a living.


Amy Fischer-Brown and Peter Hansen

Would you like to order heat detection aids through
the intemet? Want to know the latest news about heat
stress in dairy cattle? Maybe you've been meaning to
review the OvSynch protocol, or read some tips to
improve your AI technique. There are a lot of great
websites out there that can help, but who has time to sort
through them all?
Now all you need is one stop at the University of
Florida Dairy Reproduction Cookbook. We've gathered
useful websites about cattle reproduction and put them
together under one cover. Like any good cookbook full
of recipes, the Dairy Reproduction Cookbook offers a
variety of information organized into topics that interest
you, the dairy producer. You will find links related to
artificial insemination, pregnancy diagnosis, and
infertility problems, just to name a few. Content ranges
from informative background articles to instructive
video clips, as well as contact information for
commercial distributors.
Open up the Dairy Reproduction Cookbook today at
http://www.animal.ufl.edu/reproguide. We hope it will
be your herd's online recipe for success!


The 2005 Corn Silage / Conserved Forage Field Day
will be held at the UF/IFAS Plant Science Research and
Education Unit, 2256 West Highway 318, Citra, FL on

Thursday May 26 (Phone: (352) 591-2678). The
previous cor silage field days were very successful and
attracted over 250 attendees.

8:00 8:15

2005 Tentative Program

Registration Coffee, donuts, orange juice
and milk

8:15 8:20 Introduction Dr. Jerry Bennett and Dr.
Glen Hembry

Dual presentations (A & B):
8:20 9:10 A Corn and Sorghum Varieties Dr.
Carol Chambliss, Jerry Wasdin and corn
seed representatives
B Corn and Sorghum Management
Decisions that Impact Yield- Dr. David
9:10 10:00 A Corn and Sorghum Management
Decisions that Impact Yield- Dr. David
B Corn and Sorghum Varieties Dr.
Carol Chambliss, Jerry Wasdin and corn
seed representatives
10:00 10:30 Break and Exhibit Time (attendees get lunch
tickets from exhibitors)

10:30 11:15 A Factors Affecting Corn Silage Quality
in Florida- Dr. Gbola Adesogan +
Corn and Sorghum Variety Hybrid
Performance Trial Results Dr. Charles
B The Good, Bad and Ugly of Round Bale
Silage Dr. Matt Hersom

11:15 12:00 A The Good, Bad and Ugly of Round Bale
Silage Dr. Matt Hersom
B Factors Affecting Corn Silage Quality
in Florida Dr. Gbola Adesogan +
Corn and Sorghum Variety Hybrid
Performance Trial Results Dr. Charles
12:00- 12:45 Lunch
12:45 1:30 Exhibit Time
1:30 2:00 Bagging Dos and Don'ts / What it Takes to
get Quality Bagged Silage In and Out of
the Bag Art Schuette and Panel.
1:30 3:00 Field Demonstrations: Field and Forage

Registration and More Information
To register, for directions, or other information, visit
the Corn Silage / Conserved Forage Field Day website at
http://www.animal.ufl.edu. Contact person is Jerry
Wasdin, email: iwasdin(animal.ufl.edu, phone: (352)


David R. Bray

1 If you have lost all of your barn roofs and they
have not been replaced yet, you need to get temporary
shade up for cows. Shade is your first line of defense
from heat stress. You can hang shade cloth (80%) over
the existing structure or add portable shade cloth
structures. You can use sprinklers under the shade cloth
if your fans have not blown into an ocean use them. If
you don't have fans, use the sprinklers anyway. It is not
as efficient but will work.
2 Digging cooling ponds will work Make them
big enough, 50 square feet/cow, add continuous running
water if possible, or clean out existing ponds.
3 The most efficient way to cool cows is in the
holding area. Floor mounted cow washers with
overhead fans and sprinklers can cool cows to sub-
normal levels and if you add exit lane sprayers your
cows will be cool and hungry. Have water available at
the parlor exit, the cows will go to where ever their there
feed is and eat. If you can get 4 # extra dry matter in
them you will not lose 8# of milk per cow per day, even
if you provide no other cooling. Put your money in the
thing that will give you the most profit, or save the
biggest losses.
4 If you have any questions, give me a call: (352)
392-5594 or e-mail: bray(,animal.ufl.edu.


Albert de Vries, Christian Steenholdt,
and Carlos Risco

Many dairies continue to use natural service bulls as
part of their breeding system. One important reason why
bulls are used is that bulls are expected to achieve better
reproductive efficiency with a similar level of
management due to a higher number of cows serviced
with improved heat detection and improved conception
rates when compared to AI. However, few studies have
compared pregnancy rates and milk production in herds
that use either AI, bulls, or a combination.
A grant from the Southeast Milk Inc. Dairy Check-
off supported our study in which we estimated the
effects of AI and natural service breeding systems on
pregnancy rates by stage of lactation, season, and
changes in milk production over time. This study was
recently completed and published in the Journal of Dairy

Remember that pregnancy rate is the most valuable
measure of reproductive performance. It measures
which percent of the cows that were eligible to get
pregnant in a 21-day period actually got pregnant. We
used lactation and herd DHIA records of Holstein cows
in dairy herds located in Florida and Georgia. The
lactation records that we obtained did not indicate if
cows were bred by AI or bulls. Therefore, we used the
reported genetic profile of service sires of the herd to
determine the percentage of cows bred to natural service
bulls (%NS). Two seasons were considered: winter
(November through April) and summer (May through
October). We had data from 1995 to 2002. Herds were
assigned 1 of 3 breeding systems: AI (0 to 10 % NS),
mixed (11 to 89 % NS) and NS bulls (90 to 100 % NS).
We estimated that seventy percent of the herds used
bulls as a component of their breeding system during the
study period. The overall pregnancy rate during the
winter (17.9%) was twice as great as the pregnancy rate
during the summer (9.0%). During winter, pregnancy
rate for AI herds (17.9%) did not differ from that for
mixed (17.8%) and NS herds (18.0%). During summer,
the pregnancy rate for AI herds (8.1%) was slightly less
than that for mixed (9.3%) and NS lerds (9.8%). We
also calculated pregnancy rates for various stages of
lactation. During winter, pregnancy rates for cows at 71
to 91 days, 92 to 112 days, and 113
S to 133 days in milk were 1.4%
lower for mixed herds compared
with AI and NS. Pregnancy rate
for NS herds was 2.6% lower
during late lactation compared with
FLOoA DAmY CHECK-OFF AI and mixed herds. During
summer, pregnancy rates for cows
at 71 to 91 and 92 to 112 days in milk were 2.6% and
1.8% greater for NS herds compared with AI. However,
from 260 to 364 chys in milk, pregnancy rates for NS
herds were less than that for AI and mixed herds.
Rolling herd average milk production during the study
period was less in the NS herds (15,829 lbs) compared
with AI herds (18,768 lbs) and mixed herds (18,025 lbs),
but the annual change in milk production was not
different among breeding systems. The results indicated
that use of natural service bulls did not result in
meaningful disadvantages in pregnancy rates and
changes in milk production over time.
A copy of the article can be found at
(de Vries, A., C. W. Steenholdt, and C. A. Risco. 2005. Pregnancy
rates and milk production in natural service and artificially
inseminated dairy herds in Florida and Georgia. Journal of Dairy
Science 88:948-956)

The Florida Dairy Update newsletter is published quarterly by the University of Florida, Department of Animal Sciences, as an educational and informational service.
Please address any questions comments or suggestions to Albert de Vries, Editor, Dairy Update, PO Box 110910, Gainesville, FL 32611-0910.
Phone: (352) 392-7563. E-mail: devries@animal.ufl.edu. UF/IFAS Dairy Extension website: http://dairv.ifas.ufl.edu. This issue was printed on April 1, 2005.

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