Ott E A, Asquith R L, Feaster J P
J Anim Sci. 1981 Dec;53(6):1496-503. doi: 10.2527/jas1982.5361496x.
Forty-six Thoroughbred and Quarter Horse yearlings were used in two experiments designed to determine the amount of lysine in the concentrate necessary to promote maximum growth when fed the Coastal bermudagrass (Cynodon dactylon) hay provided at 1% body weight (BW)/day. In the first experiment, a 196-day trial, supplemental protein sources and analyses of the concentrates compared were: (1) soybean meal (SBM; 15.4% crude protein, .70% lysine); (2) SBM + .2% lysine (15.7% crude protein, .81% lysine), and (3) brewers dried grains + .2% lysine (15.9% crude protein, .59% lysine). Concentrate intake averaged 1.67% BW/day, and hay intake averaged .94% BW, for a total of 2.61% BW/day. Protein and lysine intakes (grams/day) for horses fed the three diets were, respectively: (1) 1,106, 48; (2) 1,091, 52 and (3) 1,077 and 40. Growth and efficiency responses for animals on treatments 1, 2 and 3 were, respectively: weight gain - 125, 123 and 114 kg; height gain - 9.5, 9.3 and 8.1 cm; girth gain - 21.6, 19.0 and 17.0 cm (P greater than .05); length gain - 14.5, 13.7 and 14.9 cm. and feed/gain - 15.3, 15.0 and 16.0. In the second experiment, a 140-day trial, SBM-based concentrates provided (1) 16.1% crude protein and .67% lysine, (2) 13.6% crude protein and.51% lysine and (3) 14.2% crude protein and .64% lysine. Concentrate averaged 1.99% BW and hay intake averaged .92% BW, for a total of 2.91% BW/day. Protein and lysine intakes (grams/day) for horses fed the three diets were (1) 1,432, 59; (2) 1,195, 46; and (3) 1,182, 53. Growth and efficiency responses for animals given the three treatments were: weight gain - 101, 87 and 101 kg (P greater than .05); height gain - 5.7, 6.0 and 6.4 cm; girth gain - 14.8, 12.2 and 16.3 (P greater than .05); length gain - 10.9, 10.9 and 11.9 cm, and feed/gain - 16.5, 17.9 and 15.0 kg (P greater than .05). No significant sex effects were detected. Results suggest that at least 1.9 g lysine/Mcal digestible energy is required to support maximum growth of yearling horses.
46匹纯种马和夸特马一岁马被用于两项实验，旨在确定当以每日1%体重（BW）的量提供海岸百慕大草（狗牙根）干草时，精料中促进最大生长所需的赖氨酸量。在第一个实验中，为期196天的试验，所比较的补充蛋白质来源和精料分析为：（1）豆粕（SBM；15.4%粗蛋白，0.70%赖氨酸）；（2）豆粕 + 0.2%赖氨酸（15.7%粗蛋白，0.81%赖氨酸），以及（3）啤酒糟干粒 + 0.2%赖氨酸（15.9%粗蛋白，0.59%赖氨酸）。精料摄入量平均为每日1.67%体重，干草摄入量平均为0.94%体重，总计每日2.61%体重。饲喂三种日粮的马匹的蛋白质和赖氨酸摄入量（克/天）分别为：（1）1106，48；（2）1091，52和（3）1077和40。处理1、2和3的动物的生长和效率反应分别为：体重增加 - 125、123和114千克；体高增加 - 9.5、9.3和8.1厘米；胸围增加 - 21.6、19.0和17.0厘米（P大于0.05）；体长增加 - 14.5、13.7和14.9厘米，以及料肉比 - 15.3、15.0和16.0。在第二个实验中，为期140天的试验，以豆粕为基础的精料提供了（1）16.1%粗蛋白和0.67%赖氨酸，（2）13.6%粗蛋白和0.51%赖氨酸，以及（3）14.2%粗蛋白和0.64%赖氨酸。精料平均为1.99%体重，干草摄入量平均为0.92%体重，总计每日2.91%体重。饲喂三种日粮的马匹的蛋白质和赖氨酸摄入量（克/天）为（1）1432，59；（2）1195，46；和（3）1182，53。给予三种处理的动物的生长和效率反应为：体重增加 - 101、87和101千克（P大于0.05）；体高增加 - 5.7、6.0和6.4厘米；胸围增加 - 14.8、12.2和16.3（P大于0.05）；体长增加 - 10.9、10.9和11.9厘米，以及料肉比 - 16.5、17.9和15.0千克（P大于0.05）。未检测到显著的性别效应。结果表明，支持一岁马最大生长至少需要1.9克赖氨酸/兆卡可消化能量。
