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Feeding Cattle: It's a Numbers Game
April, 2018
Jonael Bosques, UF/IFAS Hardee County Extension, Wauchula
Nutrition is the highest expense on any livestock operation. When talking
about cattle and other ruminants (sheep, goats, etc.) the feed bill is
reduced because these livestock species can harvest nutrients from forage in
its vegetative stage.
Often times the problem we run into is the fact that there is a group of
animals that gets enough to meet their metabolic demands while another group
is not. For example, Bahiagrass forage can meet a mature animals protein
needs but not the ones of a growing calf.
How do we make sure that our growing steers and heifers are getting enough
nutrients from the feed and forage they have access to on a daily basis?
Introducing the Numbers
The National Research Council (NRC) has developed a table that depicts the
needs for specific groups of cattle based on weight. You can find this table
3-6
here:
http://goo.gl/GWVEvR.
Steer and heifer requirements can be found in table 2
here:
http://goo.gl/qTvlSX.
These tables specify the needs for dry matter intake, total digestible
nutrient needs per day, net energy needs, crude protein needs, calcium and
phosphorus needs.
Now what?
Step 1. Know the nutrient requirements for your particular group of animals.
This is why we separate animals by age group and metabolic stage. Young
heifers should be grouped separately from older cows because each group will
need different rations.
Review and estimate your group’s weight based on the tables above.
Step 2. Know the composition of your feed. Ideally we would recommend that
you analyze the feed through a certified feed laboratory in order to get a
precise value on each batch. It is important to highlight the great
variability in nutrient content since it will depend on when the material
was harvested and how it was treated before harvest/process.
You can use the services provided by our laboratories to estimate the
nutrient value of your feed by testing them (Call our office for more
information and cost). If you are interested in an approximation, you can
use the 2016 Feed Composition Tables provided
here
to estimate your ration:
http://goo.gl/jdBJgF.
Step 3. Contact your Extension Agent to review and help you formulate a diet
for your herd. Feed companies also have animal nutritionists that can help
you get this done. If you want to learn how to do it, we encourage you to
work with a professional until you get the fundamentals on how to estimate
your feed formulation’s value. You can use these online tools to do that as
well as to reformulate a ration: 1. Noble Foundation’s online Pearson Square
calculator access it
here:
http://goo.gl/NV5RTk
for your computer. 2. For your smartphone: Drought Feed Calculator
smartphone app access it
here:
http://goo.gl/TbYyy1.
If you are a pen and paper kind of person or you would be interested in more
information and fundamentals on how to fine-tune your feed formulation you
can access this Extension publication from Colorado State:
http://goo.gl/2zbk8L.
Informed decisions can result in better outcomes. These online tools and information can get you there. When it comes to animal nutrition, it pays to know what is going in our cow’s bellies. Is it meeting their nutritional demands, and what to do if it is not? If you would like to learn more on how to formulate the rations on your livestock operation, please call your local UF/IFAS Extension agent.