Effects Of Vitamin B₆ On Energy Budget In Juvenile Acipenser Schrenki

In this experiment, six experimental diets were formulated in different Vitamin B₆ levels (0, 15, 30, 45, 60, 75mg/kg) and were fed to juvenile Acipenser schrenski (34.07g±3.44g). The growth experiment and the biochemistry analysis experiment were conducted to investigate the effects of Vitamin B₆ on feed consumption, growth, digestibility to nutrition, body composition and energy budget in juvenile Acipenser schrenski. The main results and conclusions were shown as the following:1. There were no significant differences in the feeding rates of juvenile Acipenser schrenski among different Vitamin B₆ levels, but Specific growth rates (SGR) were the best at the range of 45 mg/kg to 60mg/kg concentration.2. The Vitamin B₆ has significant effect on tryptic activity which activation was the highest at the range of 45 mg/kg to 60mg/kg concentration, and could accordingly increased protein digestibility ratio. This result indicates that the right concentration of Vitamin B₆ in the diets of juvenile A. schrenski could activate the exudation of tryptic and farther increace protein digestibility.3. The Vitamin B₆ has significant effects on fat digestibility in juvenile A. schrenski ,which was the highest at the range of 45 mg/kg to 60mg/kg concentration as well as on protein digestibility, and insteadly fat digestibility decreased at more than 60 mg/kg of Vitamin B₆ concentration. This result indicates that superfluous Vitamin B₆ may reduce the digestant time to the protein and fat digestibility in stomach and intestines and decrease the digestibility rate.4. The Vitamin B₆ significantly increased feed conversion efficiency (FCE) and protein efficiency ratio(PER) in juvenile A. schrenski which increased with the mcreasing of Vitamin B₆ level at the range of 0 mg/kg to 60mg/kg, but the FCE and PER decreased when exceeded to 60 mg/kg.5. The protein accumulation in the body of juvenile A. schrenski was the best in Vitamin B₆ level at the range of 45 mg/kg to 60mg/kg, but the fat accumulation was increased gradually at the range of 45 mg/kg to 75mg/kg. This result indicates that it can not increase and speed the protein accumulation ,and what's more it may converse to the advancing to fat...