摘要 |
A novel train of Adonis aestavalis having an average of 18 - 22 petals per flower head and containing an average of 200 - 350 .mu.g of astaxanthin pigment per flower head is cultivated, harvested and extracted to provide a source of natural astaxanthin. The extracted astaxanthin, or the harvested astaxanthin-containing plant material, can be used for example in salmonid fish diets to promote correct flesh pigmentation of the fish. |