【作者】 林映才； 蒋宗勇； 郑黎； 郭吉余； 余德谦； 吴世林；

【Author】 Lin Yingcai Jiang Zongyong Zheng Li Guo Jiyu Yu Deqian Wu Shilin(Institute of Animal Science, Guangdong Academy of Agricultural Science Guangzhou510640)

【机构】 广东省农科院畜牧研究所；

【摘要】 本试验采用60头14日龄、体重3.8kg的三元杂交[杜×(大×长)l断奶仔猪,随机分为6组,每组2个重复,研究饲粮不同色氨酸(Trp)水平(0.16%,0.19%, 0.22%,0.25%,0.28%和0.31%)对3.8～9kg超早期断奶仔猪的生产性能和血清尿素氮浓度的影响。结果表明,随饲粮色氨酸水平升高,仔储平均日增重极显著提高(P<0.01)。料重比极显著降低(P<0.01),采食量显著提高(P<0.05)。血清尿素氮浓度趋于降低(P>0.05),但Trp 0.28%组和0.31%组仔猪生产性能很相近(P>0.05)。以上结果表明,3.8～9kg趁早期断奶仔猪获最佳生产性能的色氨酸需求参数为饲粮的0.28%,饲粮中色氨酸与赖氨酸的比例为19:100:以回—直吻合术猪测定基础饲粮各种饲料的色氨酸的回肠消化率,计算表观可消化和真可消化色氨酸需求参数分别为0.23%和0.25%。更多还原

【Abstract】 Sixty three-way crossbred [Duroc x ( Landrace xYorkshire)],early-weaned piglets (initial BW=3.8kg; initial age=14d) were used to evaluate the effects of different dietary tryptophan levels (0.16, 0.19, 0.22, 0.25, 0.28 and 0.31%) on performance and serum urea nitrogen (SUN) concentration. The results showed that daily gain increased very significantly (P0.01), feed to gain ratio decreased very significantly (P0.01), feed intake increased significantly (p<0.05), SUN concentration trended to decrease (P> 0.05) as dietary lysine level increased. But the performances of the piglets offered 0.28% and 0.31% tryptophan diets were very similar (P>0.05). It was concluded that dietary tryptophan requirement of 3.8-9 kg early-weaned piglets was 0.28%, true or apparent ileal digestible tryptophan requirements were 0.25% or 0.23%.更多还原