The effect of the supplementation with methionine and lysine of diets based on lupin seed (Lupinus albus var. multolupa) on protein and energy utilization in growing rats

Prieto, C.; Aguilera, J.F.

Journal of Animal Physiology and Animal Nutrition 55(4-5): 239-246

1986


ISSN/ISBN: 0931-2439
DOI: 10.1111/j.1439-0396.1986.tb00724.x
Accession: 001707055

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Abstract
The biological protein quality and the energy utilization of semisynthetic diets based on lupine seed meal supplemented with DL-methionine and/or L-lysine have been studied in growing rats in comparison with those of a diet based on soybean meal (SBM). The biological value (BV) and the energy utilization of the diet SBM were significantly better than those of the other diets. Among diets based on lupin seed, those supplemented with DL-methionine had the highest BV values. On the contrary, the addition of only L-lysine had a deleterious effect on the nutritional quality of protein. The intake of metabolizable energy declined on decreasing BV, which promoted subsequent reductions in energy retention. With the addition of DL-methionine a positive influence upon the utilization of dietary energy was observed, as the ratio of net protein deposition to fat accretion increased. The heat treatment of lupine seed had no beneficial effect.

The effect of the supplementation with methionine and lysine of diets based on lupin seed (Lupinus albus var. multolupa) on protein and energy utilization in growing rats