Department of Animal Sciences
41ST ANNUAL FLORIDA DAIRY PRODUCTION
CONFERENCE MAY 5,2004
Please join us for the 41st Annual Florida Dairy
Production conference on May 5th, 2004. This year's
conference will be held at the Hilton University of Florida
Conference Center, located at 1714 SW 34th Street,
Gainesville, FL 32607. The Hilton also has guest rooms
available. Call the Hilton Conference Center directly at (352)
371-3600 or visit http://www.ufhotel.com.
Tuesday, May 4, 2004
Hilton Board Room
3:00 p.m. Southeast DHIA Board Meeting
Wednesday, May 5, 2004
8:30-10:00 a.m. Registration
Presiding: Mary Beth Hall
10:00 a.m. Welcome and Remarks
F. Glen Hembry, Chair, UF/IFAS Animal
10:15 a.m. Bedding Strategies in Free-stall Barns
John Bernard, Tifton Research Center, Univ. of
10:50 a.m. Strategies for Dairying Success in the Future
Richard Waybright, Mason Dixon Farms,
11:30 a.m. Latest on Tunnel Barns for Cow Comfort
David Bray, Extension Specialist, UF/IFAS
Albert's Restaurant Dining Room
12:15 p.m. Lunch (Buffet at Hilton) and Awards
Presiding: Charles Staples
1:30 p.m. Can Dairy Farming be Profitable in 2010?
Terry Smith, President and CEO, Dairy
2:25 p.m. Break
*Joint Afternoon Session With Beef Cattle Short Course*
Presiding: Todd Thrift
2:45 p.m. Under Construction: U.S. Animal Identification
Glenn Smith, Ag Infolink, Macon, GA
Spring (April) 2004
3:30 p.m. Political Climate of BSE and COOL: How Does It
Affect You at the Ranch?
Bryan Dierlam, NCBA, Washington, D.C.
4:00 p.m. Have Marketing Plans Changed Given
Ramifications of BSE?
Randy Blach, Cattle-Fax, Inglewood, CO
4:45 p.m. Adjourn to Trade Show
5:00 p.m. Allied Industry Trade Show and Reception
Sponsored by Allied Industry Exhibitors. Hors d'oeuvres
provided compliments of exhibitors. Cash bar.
Thursday, May 6, 2004
Room 151 Animal Science UF Campus
9:00-Noon PCDART Workshop This Workshop for Dairy
Managers and Consultants will be at the Animal
Science Building Room 151. Advance
registration is requested since space is limited.
Call (352) 392-5592 or email Christina Dore at
firstname.lastname@example.org by April 30th
The early registration fee is $65 and includes the program,
one copy of the proceedings, refreshment breaks,
Wednesday's lunch and reception. The regular registration fee
is $80 for payments received after April 21, 2004. To register,
visit http://conference.ifas.ufl.edu/dairv/reg.htm or complete
and return the registration form enclosed in the flyer along
with payment. Refund policy: No refunds given after April 21,
The Program and registration information can also be
viewed at the UF/IFAS Dairy Extension website
http://dairv.ifas.ufl.edu. For more information, contact Dan
W. Webb, Conference Chairman, Phone: (352) 392-5592,
Fax: (352) 392-5595, Email: webb@,animal.ufl.edu, or James
E. Umphrey, Conference Co-Chairman, Phone: (352) 392-
5594, Fax: (352) 392-5595, Email: umphrevianimal.ufl.edu,
or Kim Brand, Conference Registration, Phone: (352) 392-
5930, Fax: (352) 392-9734, Email: khbrand(iZmail.ifas.ufl.edu
BUSINESS COW COLLEGE
The Business Cow College will be held in Gainesville on
May 25+26. For more information visit http://dairy.ifas.ufl.edu.
FEEDING MORE PHOSPHORUS DOES NOT
Lactating cow diets containing phosphorus (P)
concentrations of 0.35 to 0.36% (dry matter basis) are
recommended by the national committee of dairy nutritionists
in 2001. This is a lower P concentration than what was
recommended in the previous dairy feeding guidelines of
1989. Guidelines for feeding P in 1989 were largely based
upon studies published prior to 1950 that used cattle grazing
pastures deficient in P and likely other nutrients as well.
These grazing cattle had decreased calf crops.
New research indicates that the 2001 recommendations
are just fine. Wisconsin researchers have conducted several
experiments in which they fed different dietary concentrations
of P and measured both milk production and reproduction.
For 308 days of lactation, Holstein cows were fed a diet
containing 0.31, 0.40, or 0.49% P by increasing the amount of
monosodium phosphate in the diet (Wu et al., 2000). Overall
milk production was not different among the three groups
(24,361 lbs average) although cows fed the 0.31% P diet
produced less milk during the last third of lactation.
The number of days to first estrus and to the first AI was
the same for cows fed the 0.31% and the 0.49% P diets but
were greater for cows fed the 0.40% P diet. Unexplainably,
the number of services per conception by 206 days in milk
increased as the intake of P increased.
A second experiment was done that lasted for two
consecutive lactation cycles. Holstein cows were fed one of
two diets. The low P diet contained 0.31 to 0.38% P and the
high P diet contained 0.44 to 0.48% P throughout the 2 years
(Wu and Satter, 2000). During the first lactation cycle, cows
performed the same regardless of dietary P concentration
(19,831 lbs average in 308 days).
All cows were pregnant by 230 days in milk. During the
second lactation cycle, milk production was again the same
between the two groups of cows (21,784 lb average in 308
days). In both years, the cows fed the higher P diets did not
have better pregnancy rates nor did they have fewer days open
at 230 days in milk.
In a third Wisconsin study just published in 2004
involving a lot more cows (267), diets of 0.37 and 0.57% P
supported similar amounts of milk production and similar
conception rates (Lopez et al., 2004).
In summary, these studies indicate that productive and
reproductive performance will not be improved by increasing
the dietary concentration of P above 0.37 to 0.38% (DM
basis). It was only when diets got down to 0.31% for two
years that high producing cows showed potential harmful
effects of low P intake (low P in sampled rib bones). Even if
P intake is somewhat deficient during the early days
postpartum when DMI is low, cows are likely able to mobilize
P (1.3 to 2.2 lb) from bone to meet a temporary P deficiency
and then to replace the bone P when P intake exceeds P
requirement later in lactation.
2004 CORN SILAGE FIELD DAY MAY 27,2004
The 2004 Corn Silage Field Day will be held on Thursday
May 27, 2004 at the UF/IFAS Plant Science and Education
Research Unit, 2556 West Highway 318, Citra, Florida 32113
Registration at Plant Science and Education Research
Unit, Citra, FL
Coffee, milk, and donuts provided by the Florida
Farm Bureau Federation
Drs. Jerry Bennett and Glen Hembry
8:20 Demonstrations in the Field
Dr. Carrol Chambliss, Mr. Jerry Wasdin, and
Corn Seed Representatives
15 inch rows
9:15 Fertigation/Timing of N Application and Other
Nutrient Management Recommendations
Drs. Carrol Chambliss, Danny Colvin, and
10:00 Break (Provided by Agrilianc)
10:15 Triple Cropping Forage Systems for Greater
Dr. Ray Gallaher
10:35 Weeds and More Weeds, Transgenic Varieties, and
Corn without Atrazine
Dr. Greg MacDonald
10:55 Management of Silage in Hot and Humid Areas
Drs. Limin Kung, Jr. and Gbola Adesogan
11:25 My Experiences in Corn Production:
Provided by Diamond R. Fertilizer; Farm Credit of
North Florida; Helena Chemical Co.; Southern
States, Trenton; Magnum Plus Fertilizer; Marty
Karle, Gromore UAP; and Ring Power Corporation
12:45 Equipment Field Demonstrations
Planting conventional, strip-till, no till
Static Equipment Displays
Feed Mixer Wagons
Irrigation Fertilizer Injection Pumps
Moisture Testing Equipment
Provided by Lake Butler Farm Center
Registration and Additional Information
To register, please visit the UF/IFAS Dairy Extension
website at http://dairy.ifas.ufl.edu. For further information
contact Jerry Wasdin at email@example.com or (352) 392-
IT'S SPRING CLEANING TIME AGAIN! # 10
David R. Bray
Now is the time to prepare for the long hot summer. I'm
going to repeat this thing until you do these tasks:
1. Clean out high organic matter dirt (MUD) in lots and add
new dirt, especially in calving areas.
2. Clean out cooling ponds pump out the water, and clean
out the sludge and spread it some place where the cows do not
have access to it.
3. Let ponds sit dry for the sun to work on the bacteria.
Mycoplasma and other nasty stuff live in ponds. You must
clean them out, at least once a year if you continuously add
water to the pond. If you DO NOT continuously add water,
you need to sample the ponds for Mycoplasma and pump and
clean out the ponds once or twice during the summer.
4. Clean your fans. Dirty fan shields can reduce fan
efficiency by 50%. You can purchase and install twice as
many fans if you wish not to clean them. If cows are in the
barn or holding area, run fans 24 hours a day. This not only
moves air to cool cows it also helps to remove moisture and
dry the place out.
5. Make sure your sprinklers, foggers, etc, work. It was a
cold winter, many pipes froze and/or broke, and dirty nozzles
don't add much water. Check timers for the proper time for
adding water. Constant water is not as efficient as intermittent
sprinkling and saves water. Set your sprinkler thermostat at 75
degrees F or lower during the hot season. Sprinklers need to
run at night because cows get hotter at night than daytime on
those hot nights. To repeat the above message, you need
timers to control sprinklers or you will waste great volumes of
6. Clean and rebuild your pulsators. Wash out and change
the filters on your vacuum controller, (unless you have a
variable speed drive). Make sure all ATO's work.
7. Replace all milk hoses, wash hoses, pulsator hoses and
jetter cup holders. Replace all rubber hoses that may be in the
milk house that may add water to the pipeline and /or bulk
tank wash, these hoses harbor Pseudomonas and Coliforms
and can raise your bacteria count. If rubber hoses are used to
wash udders, change them also.
8. Clean your condenser fins on your milk coolers. Dirty
fans cut down cooling and efficiency and you get warmer milk
at higher electric costs.
9. Mow and spray careless weeds in pastures.
10. Cull your chronic mastitis cows now. It will lower your
cell count and your help is sick of treating them.
11. Dip the dogs To keep the fleas out of your pick-up and
Keep a smile on your face, people will wonder what you
are up to .
NEW CALENDAR WEBSITE LISTS UF/IFAS
STATEWIDE EXTENSION EDUCATION PROGRAMS
Everything you need to know about statewide University
of Florida IFAS Extension education programs is now just a
few clicks away thanks to a new calendar of events Web site.
"Whether it's a workshop for master gardeners, a local 4-
H club seminar, a field day for peanut farmers, a nutrition
seminar for seniors, a parenting class, or hundreds of other
timely topics, we have programs statewide," said Larry
Arrington, acting dean for extension with UF's Institute of
Food and Agricultural Sciences (UF/IFAS). "Our new
calendar of events Web site is a convenient, one-stop source of
information for what's going on in all 67 Florida counties."
Arrington said the extension service provides educational
outreach programs for all Florida residents, both rural and
"IFAS Extension is your gateway to the vast resources of
UF, providing research-based information on a wide range of
useful topics," he said. ""To reach more people and expand
our extension programs, we've added an online calendar -
http://calendar.ifas.ufl.edu -- that has a complete, up-to-date
listing of extension workshops, seminars, training programs,
field days and planned events."
Millie Ferrer, interim associate dean for extension, said
there are many programs going on at any given time. Many of
these workshops provide continuing education units. No\\
Florida residents can click on programs and courses for a
specific month, geographical area, or specific topic and get
what they need quickly."
2004 FLORIDA DAIRY REPRODUCTION ROAD
SHOW PROCEEDINGS NOW ON-LINE
Albert de Vries
Over 90 people attended the 2004 Florida Dairy
Reproduction Road Show, a series of three meetings held at
the extension offices in Okeechobee (March 2), Ocala (March
4), and Chipley (March 5) with a focus on practical ways to
improve reproductive performance of dairy cows.
Topics discussed were "Trends In Reproductive
Performance In Dairy Cows: What Do The Numbers Tell
Us?", "Managing The Postpartum Cow To Maximize
Pregnancy Rates", "Successful Timed AI Programs: Using
Timed AI To Improve Reproductive Efficiency Of High
Producing Dairy Cattle", "Economic Importance Of Improved
Reproductive Performance", "Strategies For Healthy Herds",
"Reproductive Data Management With PCDART", "Embryo
Transfer That Works: Embryo Transfer As A Tool For
Improving Fertility During Heat Stress", "Getting Anovular
Cows Pregnant" and a PCDART Reproduction Workshop.
The Reproduction Road Show was sponsored by USDA-
IFAFS Grant 2001-52101-11318 ("Improving Fertility of
Heat-Stressed Dairy Cattle"), Florida Cooperative Extension
Service, and Pfizer Animal Health.
The proceedings that accompany the presentations are
now available in pdf format at http://dairv.ifas.ufl.edu.
FLORIDA DAIRY STUDENTS PARTICIPATE IN THE
31P NORTH AMERICAN INTERCOLLEGIATE DAIRY
Albert de Vries
A team of Florida dairy science students participated in
the 3rd North American Intercollegiate Dairy Challenge
(NAIDC) in Altoona, PA, on April 2 and 3, 2004. This year's
contest was hosted by Penn State University.
The UF team consisted of Melanie Burson, Kassie Krieg
and Jose Aparicio. Coach was Albert de Vries.
Created to inspire students and enhance university dairy
programs nationwide, the NAIDC is a 2-day dairy
management contest that incorporates all phases of a specific
dairy business in a fun, interactive and educational forum. It
enables students to apply theory and learning to a real-world
dairy, while working as part of a team.
The first day of the contest consists of a thorough analysis
of a dairy farm's records and a farm visit. The teams prepare a
presentation outlining what they believe are strengths and
opportunities, including their recommendations to the dairy
farmer. The second day the team presents these finding to a
jury consisting of dairy farmers, allied industry, and educators.
In addition to the contest, the NAIDC gives students and
sponsors plenty of opportunity to interact and many students
are recruited for internships orjobs.
The 2004 contest was the largest ever, with twenty-five
teams representing 23 North American universities' dairy
science programs from coast to coast. The Florida team did
well and obtained a silver award.
The NAIDC is supported financially through generous
donations by industry and coordinated by a volunteer steering
committee. More information about this exciting contest can
be found at http://www.dairvchallenge.org.
REPORT ON ROBOTIC MILKING CONFERENCE
Dan W. Webb
I had the pleasure to attend the International Symposium
on Automatic Milking in Lelystad, The Netherlands on March
24 -26. This conference was organized by the Animal
Sciences Group of Wageningen University which is the
primary dairy research institution in The Netherlands. More
than 340 persons from 24 countries were in attendance for the
48 presented papers and 80 posters representing research and
reports of robotic milking applications, world-wide. The
complete proceedings of the conference are available in the
book "A Better Understanding of Automatic Milking" from
Wageningen Academic Publishers. This book can be ordered
An introductory presentation by Rodenburg of Canada
and de Koning of The Netherlands summarized the extent of
robotic milking, citing over 2200 commercial farms with one
or more robotic systems, mostly in Europe but also in North
America, Japan, Australia and New Zealand. Most robotic
installations include a single stall with one robot capable of
identifying the cow, sanitizing the udder, attaching and
detaching the unit, post-milking flush, recording milk
production, times and other data, followed by release of the
cow. Enthusiasts state that "robotic milking" is more than just
milking, it is a different way of dairy farming". A typical
single-stall system is capable of milking 60 cows, 3 times per
day. The largest automatic milking system (AMS) (this is the
term used most often to describe robotic milking), is located in
California with 32 milking boxes, in 4 interconnected barns
each with a central cluster of 8 milking units. Adoption of
automatic milking continues to increase around the world.
I was impressed by one very interesting paper by M.W.
Woolford from New Zealand. He began his talk by saying
that New Zealand had turned off to automatic milking because
it did not seem to fit their industry. Additional consideration
of the successes in Europe resulted in a major research project
to see if "an extensive pasture driven New Zealand dairy farm
could use AMS technology to improve existing productivity
and labor utilization". The research effort is called the
"Greenfield Project". This New Zealand approach to AMS is
entirely different than that in Europe. Cows are motivated to
move through the system by offering fresh pasture and water.
The objective is 1.3 milkings per cow per day, compared to
2.8 in Europe. Greenfield seeks to get 110 cows per AMS
box, or about twice that found in Europe. Detail on the
Greenfield Project can be seen at their website
Another highlight for me was a paper presented by Rod
Claycomb of New Zealand, entitled "An on-line somatic cell
count sensor". This paper was a progress report on the
development of a sensor for use with various milking machine
systems that will provide real-time somatic cell readings
similar to a CMT score. Results presented by Mr. Claycomb
of Sensortec Ltd. are promising that such a unit will be on the
market in the near future.
Because robotic milking raised a number of questions, an
extensive research project was initiated by the EU (European
Union) in 2000. That project is still underway. Its results and
publications are available at their website
While my opinion about the future of AMS for immediate
application to Florida's dairy industry is that it is still doubtful,
there is an immense amount of technology spin-off that will
surely be useful in the future.
The Florida Dairy Update newsletter is published on a quarterly basis 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: firstname.lastname@example.org. UF/IFAS Dairy Extension website: http://dairy.ifas.ufl.edu