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Soybean
Meal Processing
Dry extrusion-expelling processing is an alternative to solvent
extraction of soybeans. This study compared the amino acid digestibility
of dry extrusion-expelled soybean meal to solvent-extracted soybean
meal using a pig and rooster bioassay. Pigs fitted with a T-cannula
were fed a diet containing 35% soy protein as the sole source
of protein. Adult cecectomized roosters were fed five grams of
crude protein from either solvent-extracted soybean meal or two
lots of extruded-expanded soybean meal processed using similar
conditions. Results indicated:
The paper provides compositional and digestibility values for the
other amino acids for the three soy protein ingredients. These results
indicate that all three soy protein ingredients are highly digestible;
extruded-expelled soybean meals are more variable than solvent-extracted
soybean meal; and amino acid digestibility values for most amino
acids were higher using the rooster assay compared to the pig assay.
(Note- The paper provides a lot of information on the various
digestibility measurements of soybean meal ingredients that could
be used in poultry and swine feeds).
Opapeju, F.O. and co-workers. 2006. Amino acid digestibility in
dry extruded-expelled soybean meal fed to pigs and poultry. J. Animal
Sci. 84:1130-1137.
The nutritional impact of adding by-products of soybean meal
processing (gums, soapstock, crude oil, foreign matter) during processing
was evaluated in swine and poultry studies. These soybean meal by-products
can be routinely added back during soybean processing. In one swine
study they found that adding these by-products to the meal significantly
(P<0.05) reduced the apparent ileal dry matter, organic matter,
crude protein and amino acid digestibilities compared to diets containing
no soybean by-products. Poultry studies confirmed the negative impact
on the nutritional value of the soybean meal when gums, soapstock
and soybean foreign matter were added back during processing.
Bruce, K.J. and co-workers. 2006. Evaluation of the inclusion
of soybean oil and soybean processing by-products to nutritional
composition and digestibility in swine and poultry. J. Animal Sci.
84: 1403-1414.
Aquaculture Use of Plant Proteins: A New Review
A major scientific review of various plant feedstuffs that may
have value in aquaculture feeds has been published. Nearly 150
technical papers were assembled by the twelve authors to explore
the potential use of oilseed proteins, legumes, cereal grains and
novel feed ingredients that have potential for use in formulating
feeds for the growing demand for aquaculture. The review discusses
the nutritional composition of the various feedstuffs as well as
the presence of bioactive compounds that may limit its use. Research
to investigate the expanded use of plant feedstuffs in fish is
easily justified based on the growing demand for farm-raised fish,
limited supplies of fish meal and rapid growth of commercial aquafeed
production. The report provides the background for developing strategic
research plans to increase the use of plant feedstuffs in this
growing industry.
Gatlin, Delbert M. III, and co-workers. 2007. Expanding the
utilization of sustainable plant proteins in aquafeeds: A review.
Aquaculture Research 38:551-579. |
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The SOYBEAN
MEAL INFORMATION CENTER is sponsored by the Soybean Checkoff: Including
the checkoff boards from, Iowa, Kansas, Michigan, Minnesota, Nebraska,
North Dakota, Kentucky and the United Soybean Board |
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