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：38-38
出版社：Government of Western Australia / Department of Fisheries
摘要：A single crop batch of Lupinus angustifolius (cv. WALAN2173M) seed was processed to
produce both a seed meal and also dehulled to produce a pure kernel meal. A series of blends
were prepared from the seed and kernel meals (100%:0%, 83%:17%, 67%:33%, 50%:50%,
33%:67%, 17%:83%, 0%:100%, respectively). The various blends were then used to determine
the relative nutritional effects of varying degrees of dehulling efficiency. The digestible value of
these neat and blended meals were compared when fed to Rainbow trout (Oncorhynchus mykiss)
using the diet-substitution method (70% reference: 30% test ingredient). Stripping methods
were used to collect faecal samples for the determination of digestible energy and nutrient
values of the neat and blended meals being tested. Significant improvements were observed
for each of dry matter, energy and protein digestibilities with increasing dehulling efficiency.
The relationship between dry matter digestibility and kernel meal proportion was curvilinear
and described by the equation: y = -0.00001x2 + 0.00299x + 0.39752. Dry matter digestibility
for the 100% kernel meal was 59.8%. The relationship between protein digestibility and kernel
meal proportion was curvilinear and described by the equation: y = -0.00002x2 + 0.00395x +
0.81914. Protein digestibility for the 100% kernel meal was 101.7%. The relationship between
energy digestibility and kernel meal proportion was linear and described by the equation: y =
0.0016x + 0.4877. Energy digestibility for the 100% kernel meal was 65.1%. The findings of
this study demonstrate that there are significant benefits from using kernel meals over seed
meals, beyond the general increased crude levels of protein and energy gained.
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