|
|
Effects Of Anti-nutritional Factors In Soybean Meal University of Illinois researchers evaluated the effects
of lectin and Kuntiz trypsin inhibitor on growth performance of young
pigs. A commercial soybean variety (Williams 82) was used to develop
isolines that are genetically void of lectin or void of lectin and the
Kuntiz trypsin inhibitor. The swine feeding study consisted of 140 pigs
weighting 13.89 kg allotted to seven treatments with 5 reps/diet and
4 pigs/pen. The seven treatments were a solvent extracted soybean meal
control and each soybean line fed raw or extruded in the corn-based
ration. The rations were formulated to contain equal levels of lysine
(1.01%) and digestible energy (3600 DE/kg). The results of the 28-day
experiment found the similar performance among pigs fed the SBM or the
extruded soybean treatments. Performance of the pigs fed the SBM or
extruded soybean treatments were significantly (P<0.05) better than
the pigs fed the raw soybean treatments. The results of this study show
that 21 percent of the growth repression caused by feed the diet containing
raw Williams 82 soybeans was restored by feeding the lectin-free soybeans
and 55 percent of the growth depression restored by the lectin and Kuntiz
trypsin free soybean treatment. These results indicate that soybeans
can be developed without two of the anti-nutritional factors contained
in commercial soybean lines. These genetically modified lines would
have greatest value when raw soybeans included in swine rations. The
lectin and Kuntiz trypsin free soybean lines must be heat-treated To
obtain maximum pig performance.
|
