Hester P Y, Krueger K K, Jackson M
Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907.
Poult Sci. 1990 Oct;69(10):1731-42. doi: 10.3382/ps.0691731.
To determine if excessive body weight and dietary protein and amino acid intake contribute to the incidence of leg deformities, the growth of male turkeys was restricted from 6 to 12 wk and from 6 to 20 wk of age by feeding diets for ad libitum intake that were low in dietary protein and amino acids (74% of controls). For those turkeys whose growth was restricted from 6 to 12 wk of age, a return to control diets (low compensatory plane) or to 20% above control diets (high compensatory plane) with respect to protein and amino acids resulted in live body weights comparable with controls at 20 wk of age. Feed to gain ratios (0 to 20 wk) were comparable between compensated and control birds, and protein efficiency was improved for birds fed the low compensatory plane diets. Restricting growth significantly lowered the incidence of leg abnormalities at 12 wk of age (P less than .05), as compared with controls, but by 20 wk, only birds fed the low compensatory plane diet showed a lowered incidence (P less than .06). These results on leg abnormalities (mainly valgus-varus deformities) suggest that rapid weight gains or dietary protein and amino acid intake may contribute to the leg weakness syndrome but is certainly not the only factor involved.
为了确定超重以及膳食蛋白质和氨基酸摄入量是否会导致腿部畸形的发生，通过给雄性火鸡饲喂蛋白质和氨基酸含量低（为对照组的74%）的随意采食日粮，在6至12周龄以及6至20周龄期间限制其生长。对于那些在6至12周龄期间生长受限的火鸡，恢复到对照日粮（低补偿水平）或恢复到比对照日粮蛋白质和氨基酸含量高20%的日粮（高补偿水平），会使20周龄时的活体体重与对照组相当。补偿组和对照组火鸡的料重比（0至20周）相当，并且饲喂低补偿水平日粮的火鸡蛋白质效率有所提高。与对照组相比，限制生长显著降低了12周龄时腿部异常的发生率（P小于0.05），但到20周龄时，只有饲喂低补偿水平日粮的火鸡腿部异常发生率降低（P小于0.06）。这些关于腿部异常（主要是内外翻畸形）的结果表明，快速增重或膳食蛋白质和氨基酸摄入量可能会导致腿部虚弱综合征，但肯定不是唯一的相关因素。
