Nutritional evaluation of sunflower-seed protein products.
Defatted sunflower-seed meal, sunflower-seed protein concentrate and protein isolate were fed to protein-depleted chicks. The effect of the enrichment of meal and of protein isolate with lysine, methionine, or a mixture of both on the nutritional value was investigated. Sunflower-seed protein products are primarily limited in lysine. Food consumption, weight gain and protein/efficiency ratio reveal superior performance of lysine- and methionine-enriched meal or protein isolate, as compared to the corresponding non-enriched products. Methionine enrichment does not improve the nutritional quality and even result in inferior performance. Non-enriched protein isolate supports better growth than non-enriched meal specially at later stages of chick growth.
D000818:Animals; D001681:Biological Assay; D002645:Chickens / Q000378:metabolism; D005527:Food, Fortified; D006368:Helianthus / Q000032:analysis; D008239:Lysine / Q000494:pharmacology; D008297:Male; D008715:Methionine / Q000494:pharmacology; D009753:Nutritive Value; D010940:Plant Proteins / Q000032:analysis / Q000378:metabolism*; D012639:Seeds / Q000032:analysis
D010940:Plant Proteins; D008715:Methionine; D008239:Lysine