The Rural Voice, 1993-01, Page 40WE WANT YOUR GRAIN!
Corn
Soybeans
Feed Grains
Quality Oats
Damaged Grains
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36 THE RURAL VOICE
Advice
Feeding value of low
bushel weight corn
The nutritive value of this year's
corn crop is significantly reduced
because of immaturity, heat damage
from drying and mechanical
damage during harvest. Special
supplementation may be needed in
order to maintain production.
We really don't know how
deficient the corn is in energy
compared to normal. Bushel
weight is regarded as a good guide
on energy. Corn with a low bushel
weight will be lower in energy than
corn weighing 56 pounds.
Samples are presently being
collected so that we'll have some
guidelines in two or three weeks.
Protein values of this year's corn
are quite variable. There has been a
range from 5.3 to 8.6 per cent (85
per cent dry matter basis) on
samples tested to date.
STRATEGY FOR FEEDING
THE CROP
Feed companies will be able to
adjust their product ingredient
formulas to compensate for the
lower nutritive value of this year's
corn. On-farm feeders need to
adjust their own mixes and/or
feeding levels to compensate.
Producers will have to:
• Test corn for moisture and
protein.
• Determine bushel weight for
15 per cent moisture corn.
• Examine corn for evidence of
caramelization (burnt odour,
darkened kernels). Severely
caramelized corn may be as much
as 15 per cent lower in protein and
energy value.
• Re -balance rations to account
for differences in corn protein,
energy and moisture contents.
• Re -calibrate volumetric mills
to compensate for lower bushel
weights.
A paper on Feeding Value of
Low Bushel Weight Corn is
available from OMAF offices. It
contains tables that are useful in
estimating equivalent weights of
low grade corn and factors to use in
adjusting mix mills.0
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