摘要
采用单因子试验设计在凡纳滨对虾Litopenaeus vannamei基础日粮中按照质量比添加低聚木糖,添加量分别为0、0.01%、0.03%和0.05%,共4个处理,每个处理3个重复,每重复凡纳滨对虾40尾,饲养56d,研究了低聚木糖对凡纳滨对虾生长性能和消化道主要消化酶活性的影响.结果表明:低聚木糖对对虾增质量率和特定生长率均无显著影响(P>0.05),但试验组对虾末质量、增质量率和特定生长率均高于对照组,且增质量率分别提高了9.41%、8.41%和11.93%,特定生长率分别提高了2.06%、2.06%和2.65%;试验组饵料系数较对照组均下降,降低了1.83%～5.51%,其中0.03%组饵料系数显著低于对照组(P<0.05),试验组饲料效率较对照组提高了4.88%～11.90%,其中0.03%组饲料效率显著高于对照组(P<0.05).添加低聚木糖后能够一定程度地增加凡纳滨对虾消化道中的蛋白酶、淀粉酶和脂肪酶的活性,但效果不明显(P>0.05),而且消化酶活性也不随低聚木糖在基础日粮中的比例的递增而增加;除0.03%低聚木糖组的肠道淀粉酶外,肝胰脏和肠道的消化酶活性都高于对照组的(P>0.05).在凡纳滨对虾基础日粮中添加低聚木糖可以促进生长、降低饵料系数和提高饲料效率,对消化道主要消化酶活性没有显著影响,但有增加其消化酶活性的趋势.
An experiment was conducted to investigate the effect of adding xylooligosaccharide （XOS） on growth performance and activity of main digestive enzymes in Litopertaeus varmamei. Four hundred and eighty fingerlings of Litopenaeus vannamei （ initial mass at 0.05 g） were allotted randomly to four treatments,each with three replicates. Four diets were 0,0. 01% ,0. 03% and 0. 05% XOS,respectively. Diets were fed to satiety to shrimp for 56 days. The results showed that although adding XOS had no significant effect on final mass, mass gain ratio （MGR） and special growth ratio （ SGR）, those of test groups were higher than the control group. MGR increased by 9.41% ,8.41% , 11.93% ; SGR by 2. 06% ,2.06% , 2.65% in comparison with control,respectively. Feed conversion ratio was reduced by 1.83% -5.51% and that of the group fed the diet with 0. 03 % XOS had significantly lower than the control （P 〈 0.05 ）. Feed efficiency of test groups increased by 4.88% - 11.90% and that of group fed the diet with 0. 03% XOS had significantly higher than the control （ P 〈 0. 05 ）. Adding XOS had no significant effect on the activity of protease, amylase and lipase in digestive intestine, but could increase their activities. When the content of adding XOS was increasing, the digestive activity did not increase. Activities of three kinds of enzymes in the shrimp of test groups were higher than that of the control, except the activity of amylase in the intestine of shrimp fed the diet with 0.03% XOS. It is recommended that dietary XOS can promote growth, reduce feed conversion rate, and enhance feed efficiency. The activity of digestive enzyme in the shrimp had a ascending trend.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2010年第3期61-64,共4页
Journal of South China Agricultural University
基金
广东省科技计划项目(2007B020803002)
珠海市攻关项目(PC20071058)
广东省自然基金(8151907001000001)
关键词
低聚木糖
凡纳滨对虾
生长性能
消化酶活性
xylooligosaccharide
Litopenaeus vannamei
growth performance
digestive enzyme
