this is appropriate only for those amino
acids actually involved in milk production.
Therefore, it says little about the requirement
for maintenance or growth.
Kansas State University researchers have
drawn attention to the further difficulty of a
lack of published studies into the requirement
of the lactating sow for sulfur amino acids.
Their own investigations have yielded clues
that the ratio of total sulfur amino acids to
lysine should be well above 50%, not the
48% calculated from NRC-98 recommendations. Optimal lactation diet formulations
are also now said to be increasingly related
to the sow’s parity. The case is made for
special feeding of first-parity females so
that their daily lysine intake is maintained
despite a typically smaller appetite for feed.
It also appears that for these same animals,
achieving top reproduction results imposes
an even higher lysine requirement than for
most milk production.
Feeding by parity imposes obvious
strains on storage and equipment inventory
as well as on management control.
Nevertheless, herd owners with enough
sows and an appropriate production site
organization to handle separate feeds
should benefit from the split approach. It
should certainly be less expensive than the
alternative of giving a higher-nutrient diet to
all sows in the herd.
+
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= PROFITABILITY
Multiple-phase feeding
In fact, the case is being made for
multiple-phase feeding of modern high-performing sows in both gestation and
lactation.
This could supply the extra nutrients
considered useful in late gestation, rather
than the usual approach of providing the
same feed type in a set amount each day
throughout pregnancy. It would recognize
the parity differences in lactation.
Multiple-phase feeding
of high-performing sows
in gestation and lactation
could supply the extra
nutrients considered
useful in late gestation.
Feed Flavors provide consistent taste profiles.
As animal nutritionists strive for diets that benefit
nutritionally they are often faced with masking
unpleasant aromas and tastes. Adding a uniform
flavor profile helps overcome feed refusal issues.
Adimix contains sodium butyrate, a short-chain
fatty acid, which aids in gut development, structure
and integrity; supporting immune function and
favorable GI-tract micro-flora leading to improved
performance and well being.
Unike has been shown to improve animal
performance by maintaining production efficiency,
decreasing feed refusal and immune suppression,
and minimizing stresses related to production,
reproduction, and environmental issues.
There should be the additional advantage
of a saving in total feed usage, particularly if
late-gestation increases succeed in cutting
the loss of backfat cover during lactation so
that less compensatory feeding is needed to
restore condition after the next weaning.
Special first-parity formulations for both
gestation and lactation also can take account
of new research, such as that published
last year in the Journal of Animal Science,
arguing for an increased supplementation
of arginine in diets given in the first parity as
a boost to pre-weaning piglet growth rates.
The weight gained while in the suckling period was significantly better for piglets from
supplemented sows. [FM]
Unike
www.appliednature.com
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