标题：Evaluation of the digestible value of lupin and
soybean protein concentrates and isolates when fed
to rainbow trout, Oncorhynchus mykiss, using either
stripping or settlement faecal collection methodsa
期刊名称：Western Australia. Fisheries Department. Fisheries Research Reports
印刷版ISSN：1035-4549
出版年度：2008
卷号：178
页码：220-220
出版社：Government of Western Australia / Department of Fisheries
摘要：A series of prototype protein concentrate and isolate products were prepared from the kernel
meals of Lupinus angustifolius (cv. Gungarru) and L. luteus (cv. Wodjil). The digestible value of
these value-added meals, the original kernel meals and a range of similar soybean based products
were compared when fed to rainbow trout (Oncorhynchus mykiss). Both faecal stripping and
settlement collection methods were used to allow a comparison of the effects of these collection
methods on the determination of digestible energy and nutrient values of the component ingredients
being tested. Significant differences were observed on the digestibility of component ingredients
between the two faecal collection methods with the faecal stripping collection method was the
more conservative of the two assessments. This was also principally related to the significant
differences observed on nutrient and energy digestibilities of the same ingredients between the
two faecal collection methods, particularly those ingredients higher in carbohydrates. Both faecal
collection methods evaluated demonstrated substantial nutritional value in all of the products
evaluated. Significant improvements in most digestible parameters were observed with increasing
levels of processing of both lupin species and soybean meal. The largest relative increase in
digestibilities of organic matter, energy and protein were seen between the kernel meals and
protein concentrates. Improvements with further protein isolation, from concentrate products to
isolate products were limited. Phosphorus digestibilities of all lupin products were very high and in
contrast to the other nutrient digestibilities diminished with increasing levels of lupin processing.
Significant effects on faecal integrity were also noted among the grain products.
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