The chemical composition and nutritive value of low-alkaloid varieties of white lupin 1. Seed, cotyledon and seed coat characteristics
Z. Zduńczyk 1,   J. Juśkiewicz 1,   M. Flis 2,   R. Amarowicz 1,   B. Krefft 1
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Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Division of Food Science, Tuwima 10, 10-718 Olsztyn, Poland
Institute of Animal Nutrition and Feed Management, Olsztyn Academy of Agriculture and Technology, Oczapowskiego 5, 10-718 Olsztyn, Poland
Publication date: 1996-01-12
J. Anim. Feed Sci. 1996;5(1):63–72
The size, weight and chemical composition of seeds, cotyledons and seed coat of three Polish varieties of low-alkaloid white lupin, Wat, Hetman and Bardo, were determined in seed samples from the 1992-1994 harvests. In the oldest variety, Wat, the average proportion of the seed coat was nearly 21%, while crude protein content in seeds amounted to 34% of DM. The newer varieties, Hetman and Bardo, had a lower seed coat content (about 18%) and contained more protein (37 and 38% DM, respectively). The alkaloid content in Wat seeds was almost 1 mg/g, while the newer varieties had half this amount. Large differences were found in the contents of nutrients and alkaloids, depending on harvest year. Dehulling raised the protein content to 41-46% DM and significantly decreased the seed fibre content. Large variations in trace element content were found, independent of the lupin variety, most notably in respect to Mn, Fe and Cu. The Mn content of seeds was relatively high, ranging from 0.44 to 1.45 g/kg.
Influence of alkaloids and oligosaccharides from white lupin seeds on utilization of diets by rats and absorption of nutrients in the small intestine
Z Zdunczyk, J Juskiewicz, S Frejnagel, K Gulewicz
Animal Feed Science and Technology