Abstract

Abstract This project aimed to test whether the gut microflora influenced the nutritional value of ryegrass (Lolium perenne L.)-white clover (Trifolium repens L.) leaf protein concentrate (LPC). The effects of giving a diet containing LPC as the main protein source to chickens was compared to the effects of giving a diet containing heat-treated soybean meal (SBM). Supplementation of the LPC diet with an antibiotic (Neomix®) gave an improvement in growth and an increase in the mean amino acid digestibility (measured by excreta analysis) of approximately 7%. Chickens given the diet containing LPC tended to have a higher level of C19. cyclopropane fatty acid in the excreta than chickens given the SBM diet. This indicated that consumption of the LPC diet influenced the nature and/or activity of the gut microflora, and that gut microflora influenced the nutritional value of LPC.

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