|
|
Resource:
|
Dr. Ivan Rush, University of Nebraska - Scottsbluff
Dr. Rick Rasby, University of Nebraska - Lincoln
|
|
|
Calculating Trace Minerals for Beef Cows
|
|
This calculator will help you determine
if the desired daily trace mineral consumption of your cow herd is being met.
If it is not being met, then the calculator will help you through the
calculation to determine the percentage or concentration of that trace
mineral needed in the mineral supplement to meet the desired trace mineral
daily consumption.
|
|
| |
Choose a Trace Mineral to evaluate
|
|
| |
|
|
|
Section 1
|
|
This section will help you
estimate the feed capacity, in pounds, on a dry matter (DM) basis for the
female that you are evaluating the Trace Mineral for. This is the total
pounds of feed that the animal can eat each day. Dry matter basis means
that all the water has been removed from the feed, which is not how feeds
or forages are fed or consumed, but because all feeds differ in their
moisture content, nutrient requirements for beef cattle are on a feed
dry matter basis.
|
| |
| |
Estimate or project the daily feed intake on a Dry
Matter (DM) basis
|
lb/day
|
If you don't know how to estimate
total dry matter capacity, which is the amount of feed that it takes to
fill the rumen, fill in the following field for Cow Weight,
select Forage Quality and Stage of Production, and the program will
calculate feed intake on a DM basis for you.
|
| |
Enter the Cow Weight |
800 - 1400 lb
|
| |
Choose the Forage Quality |
|
| |
Choose the Stage of Production |
|
Dry Matter feed capacity as a percent of body
weight
|
%
|
| |
Section 2
Estimate the amount of the Trace Mineral
from the forage and/or feed consumed by the animal.
|
| A. |
Estimating the amount of Trace Mineral from grazed forage.
|
| |
| |
Enter the pounds of forage or hay consumed or fed
daily on a DM basis
|
lb/day
|
The number entered here is based on the
daily feed dry matter capacity estimated in Section 1. This number should not be
greater than the number in Section 1. If the animal is consuming forage and
no other feed, then enter the number estimated in Section 1. If the animal is
eating forage and some other feed, then this number is somewhat less than
the number estimated in Section 1.
|
| |
Enter the concentration or percentage of the Trace Mineral in the
forage or hay
|
ppm, or
percent
|
Amount of Trace Mineral supplied by the
forage or hay
|
mg
|
| |
| B. |
Estimating the amount of the Trace Mineral from other
feeds (hay, grain, protein supplement, etc.).
|
| |
| |
If there is another feed being consumed in
addition to the grazed forage or hay, then fill in the following fields.
The total amount of feed consumed daily by the animal from A and B in
Section 2 should not exceed the amount estimated in Section 1. If there
are no other feeds, then go to Section C.
|
| |
| |
Enter the pounds of the feed consumed or fed on
a DM basis
|
lb/day
|
| |
Enter the concentration or percentage of Trace Mineral in the Feed
|
ppm, or
percent
|
Amount of the Trace Mineral Supplied by
this Feed
|
mg
|
| |
| |
If there is another feed being fed in addition
to the grazed forage, and the feed mentioned above, then fill in the following
fields. If there are no other feeds, then go to section C.
|
| |
| |
Enter the pounds of feed consumed or fed daily on
a DM basis
|
lb/day
|
| |
Enter the concentration or percentage of Trace Mineral in feed
|
ppm, or
percent
|
Amount of the Trace Mineral Supplied by
this feed
|
mg
|
| |
| C. |
Estimating the amount of the Trace Mineral from the mineral
supplement.
|
| |
| |
If you are feeding a mineral supplement,
then fill in the following fields. The total amount of feed consumed
daily by the animal from A, B, and C in Section 2 should not exceed the
amount estimated in Section 1. If there is no mineral supplement being
fed, you still need to estimate or project the amount of mineral that
will be consumed on a per head basis. Most mineral supplements have a
feed tag that indicates their estimate of daily intake. Most mineral
supplements are consumed at a rate of 2 to 9 oz/head/day.
|
| |
| |
Enter the daily amount of the supplement consumed
|
|
Supplement intake expressed in other units
|
|
| |
Enter the concentration or percentage of Trace Mineral in supplement |
ppm, or
percent
|
Amount of the Trace Mineral supplied by the supplement
|
mg
|
| |
Section 3
This section will check the total amount of feed consumed on a dry matter
basis. The DM intake estimated in Section 1 will be compared against the
amount of feed that is being consumed in Section 2. If the DM intake
estimated in Section 1 is within 1 pound of the sum of the estimated
amounts of the feed being fed from Section 2, then proceed to Section 4.
If not, go back to Section 2 and check the amount of each feed being
consumed by the animal.
|
| |
| |
Estimated DM intake from Section 1
lb
|
DM intake from Section 2
lb
|
| |
Section 4
This section will calculate the total amount of the Trace Mineral coming
from all the feed sources that the animal is consuming. The number in the
following field is the sum of the Trace Mineral consumed by the animal
from the grazed forage, feed, and mineral supplement you listed above.
|
| |
Amount and concentration of the Trace Mineral
consumed daily from the feeds and supplement listed above.
|
mg/head/day
ppm
|
| |
Section 5
This section will help you determine if the daily desired Trace Mineral
intake is being met with the diet that is currently being consumed by
the animal.
|
| |
| |
|
| |
Enter Trace Mineral NRC Requirement or desired Trace Mineral
intake as a concentration (ppm) or percent in the ration
|
ppm, or
percent
NRC Recommendations (in ppm):
Requirement
|
| |
|
Desired daily Trace Mineral consumption |
mg/head/day
|
This number is calculated by multiplying the number in the first
field in Section 5 and DM intake from Section 1
|
Amount of Trace Mineral from forage and
feed
|
mg/head/day
|
Amount of Trace Mineral from the mineral
supplement
|
mg/head/day
|
Is the daily Trace Mineral consumption
adequate or deficient
|
mg/head/day
|
| |
Section 6:
If the daily Trace Mineral consumption is deficient,
this section will calculate the percentage of Trace Mineral needed
in a mineral supplement that could be purchased to meet the desired
daily consumption. If you are blending a mineral mix to be fed
to the cow herd, this section will calculate the amount of the Trace
Mineral source that needs to be included in the mix to meet the
desired daily consumption
|
| |
The Supplement as a percent of the total
ration
|
percent of total ration
|
Percent or concentration of the Trace Mineral needed in supplement to
meet the desired daily consumption
|
percent of supplement
ppm of supplement
|
Trace Mineral Source and Percent of Trace Mineral in that compound:
|
|
Percent of Trace Mineral source needed in
supplement to meet desired daily consumption
|
%
|
Amount of Trace Mineral source needed in supplement
to meet desired daily consumption
|
|
| |
|
|
|
Use this calculator as a guide to Trace Mineral supplementation of your
beef herd. No warranty of results is guaranteed because results will vary
according to management style, bio availability of nutrients, and animal
type.
|
| |
|
|
|
|
|
| |
|
|
