Corn, also called Indian corn or maize, is a kind of cereal plant of the
grass family (Poaceae). It is one of the most widely distributed food crops and
also the primary grain used in animal feed in North America, supplying a
greater energy density than smaller grains.
In recent years, new
earlier maturing corn hybrids are now being grown in New Brunswick (NB), reducing the need
to import corn from the United States and showing the potential to improve the
sustainability of the local dairy industry. However, there is debate within the
industry concerning the value and best use of the grain. So the authors
conducted an experiment to determine the nutritive value and assess lactational
performance of cows provided with imported dry corn, local dry corn, high
moisture (HM) shelled corn and high moisture corncob meal (HMCCM). And three
samples of each product were obtained. After the experiment, in sacco digestibility data were
analyzed using the ANOVA procedure of Minitab 16 with samples as random
variables and animal performance parameters were analyzed using the GLM
procedure of Minitab.
Through analyzing, the
results showed that rates and extent of digestion were similar for local and
Ontario corn regardless of presentation for crude protein and starch, but acid
detergent fiber, neutral detergent fiber and dry matter digestibility values
were lower for HMCCM than other treatments. A 4 × 4 Latin square study was
conducted with 16 Holstein cows and 28 day feeding periods. Milk production and
milk protein production were higher (P < 0.05) with the locally produced dry
corn than with other treatments. Energy corrected milk was lowest with the
HMCCM diet.
In summary, the
feeding value of corn produced in New Brunswick is similar to that produced in
Ontario and HM and HMCCM provide viable options for storing locally produced
corn.
Article by Essi H. Evans, et al, from Canada.
Full access: http://mrw.so/1zaElz
Image by Akawat Kitikunlanan, from
Flickr-cc.
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