Author : Ronald Irvin Pick
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (319 download)
Book Synopsis Nutritive Value of High-lysine Corn: Availability and Deficiencies of Essential Amino Acids for Growing Rats and Swine by : Ronald Irvin Pick
Download or read book Nutritive Value of High-lysine Corn: Availability and Deficiencies of Essential Amino Acids for Growing Rats and Swine written by Ronald Irvin Pick and published by . This book was released on 1968 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies involving 210 rats were conducted to determine the extent of amino acid deficiencies in high-lysine corn and to obtain an indication of the availabilities of its constituent amino acids. Rats fed diets based on high-lysine corn and supplemented to meet the requirements for isoleucine, lysine, methionine plus cystine, phenylalanine plus tyrosine, threonine and valine showed excellent daily gains, gain?feed and protein efficiency ratios. The results of this study suggest that high-lysine corn diets containing 0.36% isoleucine, 0.70% lysine or less, 0.40% methionine plus cystine 0.59% phenylalanine plus tyrosine, 0.43% threonine and 0.54% valine were adequate for the growing rat. These findings suggest that the currently accepted requirements of the growing rat for isoleucine, lysine, methionine plus cystine, phenylalanine plus tyrosine and threonine are slightly excessive. The per cent absorbed nitrogen retained was increased significantly when lysine was increased from 0.53 to 0.72% of the diet, was unaffected by an additional 0.19% dietary lysine or by increasing dietary isoleucine from 0.36 to either 0.46 or 0.56% of the diet. It appeared that the protein of the high-lysine corn used in this study was readily digested and that its constituent amino acids were readily available to support rapid and efficient daily gains, and excellent protein efficiency ratios as well as retention of apparently absorved nitrogen.
