摘要
试验选用１日龄艾维茵肉鸡苗１６８０只，分为７个处理，处理Ａ喂基础日粮，处理Ｂ、Ｃ、Ｄ分别在基础日粮中添加００５％、０１０％、０１５％的蛋氨酸，处理Ｅ、Ｆ、Ｇ分别在基础日粮中添加００５％、０１０％、０１５％的甜菜碱，前期和后期基础日粮中的蛋氨酸分别为０３８％和０３３％；试验结束时，每处理选６只鸡，采血分析血浆尿素氨（ＢＵＮ）的含量，并做屠宰试验，分析胴体品质。结果表明：在１～２１日龄，处理Ｅ效果较好，其增重与处理Ｄ差异不显著（Ｐ＞００５），而与处理Ｂ、Ｃ差异极显著（Ｐ＜００１）；在２２～４４日龄，处理Ｅ的平均增重和饲料转化率与处理Ｂ、Ｄ差异不显著，在这两期中随着甜菜添加量的继续增加，生产性能都下降；鸡的ＢＵＮ含量也说明２２～４４日龄的蛋氨酸和甜菜碱的添加量都以００５％为好；各处理的全净膛率、胸肌率、腿肌率差异不显著（Ｐ＞００５），添加甜菜碱各处理的腹脂率与处理Ａ及后期含适量蛋氨酸的处理Ｂ差异不显著。结果证明甜菜碱可代替肉鸡日粮中２４％左右的蛋氨酸，而对胴体品质无明显影响。
ne thousand six hundred and etghty broilers of 1 day were randomly divided into 7 groups. Control group A was fed basal diet, group B、C、D were fed basal diet fortified with 0.05%、0.10%、0.15% methionine, group E、F、G were fed basal diet fortified with 0.05%、0.10%、0.15%betaine respectiely. The methionine level of basal diet was 0.38% for the starter and 0.33% for the finisher. At the termination of feeding trial, 6 chickens were selected from each group, blood samles were taken to test BUN, and then the chickens were slaughtered to evaluate carcass quality . During day 1 to 21, group E produced better result, its average weight gain(AWG) showed no significant difference from that of group D(P>005), but showed greatly significant difference from that of group B and C (P<001). During day 22 to 44, AWG and feed conversion rate of group E showed no significant difference from that of group B and D (P>005),during both preiod, as the addition of betaine increased, the performance of chickens became worse. BUN indicated the addition of 0.05% methionine or betaine was better for day 22 to 44.The addition of 0.05% methionine or betaine did not significantly affect net dressing precentage breast meat rate leg meatrate, abdominal fat rtate of the groups added with betaine was not significantly different from that of group A and B (P>005). The result implicated that betaine could replace about 24% of the total diet methionine and did not affect carcass quality significantly.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
1997年第A00期30-34,共5页
Journal of South China Agricultural University
