摘要
The effects of ration level and feeding frequency on digestibility in juvenile soft-shelled turtle, Pelodiscus sinensis, were investigated. Four ration levels 1.5%, 2.5%, 4.0% and satiation (6.0% BW/d) were used. Apparent digestibility (AD) of dry matter (DMAD), protein (PAD) and protein real digestibility (PRD) were significantly affected by ration level, but not by feeding frequency when the ration level was similar. However, the feeding frequency affected the AD, DMAD, PAD and PRD signifi-cantly when the turtles were fed to satiation. The relationship between fecal protein content (Y) and protein intake (X) can be expressed as a quadric equation: Y=?0.1742+0.1476X?0.0003X2 (r2=0.876, n=27, F=93.92, P<0.01).
The effects of ration level and feeding frequency on digestibility in juvenile soft-shelled turtle, Pelodiscus sinensis, were investigated. Four ration levels 1.5%, 2.5%, 4.0% and satiation (6.0% BW/d) were used. Apparent digestibility (AD) of dry matter (DMAD), protein (PAD) and protein real digestibility (PRD) were significantly affected by ration level, but not by feeding frequency when the ration level was similar. However, the feeding frequency affected the AD, DMAD, PAD and PRD significantly when the turtles were fed to satiation. The relationship between fecal protein content (Y) and protein intake (At) can be expressed as a quadric equation: Y=-0.1742+0.1476X-0.0003X^2 (r^2=0.876, n=27, F=93.92, P〈0.01).
基金
Project supported by the Scientific and Research Bureau of Shenzhen, China
关键词
可消化性
定量研究
摄食频率
海龟
Digestibility, Ration level, Feeding frequency, Juvenile soft-shelled turtle, Pelodiscus sinensis