Rosell V L, Zimmerman D R
J Anim Sci. 1984 Jul;59(1):135-40. doi: 10.2527/jas1984.591135x.
Three experiments were conducted to estimate the lysine requirement of the weanling pig and the effects of excess arginine and threonine on that estimate. Feeding 1.15% dietary lysine in Exp. 1 and 1.20% in Exp. 2 maximized feed efficiency and resulted in the lowest plasma urea N values. Adding .15% threonine to the diets in Exp. 2 did not affect (P greater than .10) performance of the pigs, but increased (P less than .01) plasma urea N and decreased (P less than .01) plasma lysine concentrations. Supplemental arginine (.22%) did not affect performance of the growing pigs in Exp. 3, but it increased (P less than .01) plasma urea N. Pigs fed a corn-soybean meal diet utilized feed more efficiently (P less than .05) than those fed a corn-fish meal-dried whey diet. The most likely cause for this response was that the corn-soybean diet contained more lysine (.82%) than expected, whereas the corn-fish meal-dried whey diet had close to the expected content of lysine (.72%). From these results, it was concluded that the lysine requirement of the weanling pig fed practical diets is at least 1.15 or 1.20% of the diet. Also, added arginine or threonine did not adversely affect the performance of pigs.
进行了三项试验，以估计断奶仔猪的赖氨酸需求量，以及过量精氨酸和苏氨酸对该估计值的影响。在试验1中饲喂1.15%的日粮赖氨酸，试验2中饲喂1.20%的日粮赖氨酸，可使饲料效率最大化，并使血浆尿素氮值最低。在试验2的日粮中添加0.15%的苏氨酸对仔猪的生长性能没有影响（P>0.10），但会使血浆尿素氮升高（P<0.01），血浆赖氨酸浓度降低（P<0.01）。在试验3中添加精氨酸（0.22%）对生长猪的性能没有影响，但会使血浆尿素氮升高（P<0.01）。饲喂玉米-豆粕日粮的仔猪比饲喂玉米-鱼粉-乳清粉日粮的仔猪饲料利用效率更高（P<0.05）。这种反应最可能的原因是玉米-豆粕日粮中的赖氨酸含量（0.82%）高于预期，而玉米-鱼粉-乳清粉日粮中的赖氨酸含量接近预期（0.72%）。从这些结果可以得出结论，饲喂实用日粮的断奶仔猪的赖氨酸需求量至少为日粮的1.15%或1.20%。此外，添加精氨酸或苏氨酸对仔猪的生长性能没有不利影响。
