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the estimated requirements
are expressed as a percentage of the lysine.The minimum proportion of
essential to non-essential amino acids they estimated to be at least 45:55.
Speer (1990) gave estimates of 35:65 and 44:56 for gestating and
lactating pigs respectively.40 Nutrition of non-ruminants
Figure 3.3:Amino acids in soya bean meal:comparison with the ideal protein
(Source:* Wang and Fuller,1989; **Tropical Feeds,1994).
The recommended strategy when balancing tropical energy-rich feeds
(such as juice from sugar cane and sugar palm,molasses,cassava root
meal,cassava starch processing by-products,palm oil,oil-pressed fibre
and oil palm fruit),is to prepare a protein supplement which has a
balance of amino acids that resembles as closely as possible that
proposed by Wang and Fuller (1989) (Table 3.1).Where a variety of
protein sources are on offer,a "least cost" computer program can be used
to achieve such a balance.An example of this approach was given by
Speedy et al.(1991) for preparing a protein supplement to balance sugar
cane juice for pig fattening in Swaziland.
For the next step one should ideally be able to refer to regression
equations relating productive function to protein (balanced according to
Wang and Fuller,1989) for the particular energy-rich "tropical" feed
being used.An example of this approach is given in the work reported by
Bui Huy Nhu Phuc et al.(1994) and Ospina et al.(1994),referred to
above (Figure 3.2).Response curves relating growth and carcass traits
with supply of a balanced protein (soya bean meal),were determined for
basal diets of sugar cane juice and cassava root meal,respectively.FromTropical animal feeding:a manual for research workers 41
such data it is possible to calculate the marginal advantage (or
disadvantage) of a particular level of protein input in terms of the
expected increase in productivity that will result,compared with using
a lower level of protein.
the estimated requirements
are expressed as a percentage of the lysine.The minimum proportion of
essential to non-essential amino acids they estimated to be at least 45:55.
Speer (1990) gave estimates of 35:65 and 44:56 for gestating and
lactating pigs respectively.40 Nutrition of non-ruminants
Figure 3.3:Amino acids in soya bean meal:comparison with the ideal protein
(Source:* Wang and Fuller,1989; **Tropical Feeds,1994).
The recommended strategy when balancing tropical energy-rich feeds
(such as juice from sugar cane and sugar palm,molasses,cassava root
meal,cassava starch processing by-products,palm oil,oil-pressed fibre
and oil palm fruit),is to prepare a protein supplement which has a
balance of amino acids that resembles as closely as possible that
proposed by Wang and Fuller (1989) (Table 3.1).Where a variety of
protein sources are on offer,a "least cost" computer program can be used
to achieve such a balance.An example of this approach was given by
Speedy et al.(1991) for preparing a protein supplement to balance sugar
cane juice for pig fattening in Swaziland.
For the next step one should ideally be able to refer to regression
equations relating productive function to protein (balanced according to
Wang and Fuller,1989) for the particular energy-rich "tropical" feed
being used.An example of this approach is given in the work reported by
Bui Huy Nhu Phuc et al.(1994) and Ospina et al.(1994),referred to
above (Figure 3.2).Response curves relating growth and carcass traits
with supply of a balanced protein (soya bean meal),were determined for
basal diets of sugar cane juice and cassava root meal,respectively.FromTropical animal feeding:a manual for research workers 41
such data it is possible to calculate the marginal advantage (or
disadvantage) of a particular level of protein input in terms of the
expected increase in productivity that will result,compared with using
a lower level of protein.
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