摘要
为确定斑节对虾(Penaeus monodon)养殖系统中生物絮团形成所需的最适碳源及添加量,试验选取葡萄糖、蔗糖、糖蜜3种碳源按碳(C)与氮(N)比(C/N)为20∶1添加,再按日投饲量的0%、25%、50%、75%和100%添加蔗糖,以期获得其最适添加量。结果显示,添加3种不同糖作为碳源均可以显著提高斑节对虾的特定生长率(P<0.05),而添加蔗糖可以显著提高斑节对虾的成活率(P<0.05);与其他组相比,添加75%的蔗糖组可以显著提高斑节对虾的特定生长率和成活率(P<0.05),促进异养细菌和浮游植物的繁殖,水体氨氮(NH4-N)、亚硝酸氮(NO2-N)等有害物质的浓度较低,过多的添加蔗糖却会起到反作用。结果表明添加75%的蔗糖最适合生物絮团在斑节对虾养殖系统中形成,并促进斑节对虾的生长。
To determine the optimum carbon source and dosage for bio-floc formation in Penaeus monodon culture system,we added three kinds of carbon source including glucose,sucrose and molasses in the culture system at C/ N ratio of 20： 1. The sucrose was added into the culture system at daily feeding ratios of 0% ,25% ,50% ,75% and 100%. Results show that all carbon sources tested in the present study could significantly increase the special growth rate（SGR）of P. monodon（P ﹤ 0. 05）. Sucrose could significantly increase the survival rate（SR）of P. monodon（P ﹤ 0. 05）. Compared with the other groups,75% of sucrose could significantly improve the SGR and SR of P. monodon（P ﹤ 0. 05）,and sucrose could promote heterotrophic bacteria and phytoplankton reproduction,and indirectly reduce concentration of harmful substances in water such as NH4-N and NO2-N,but adding excessive sucrose would be counterproductive. The results reveal that adding 75% of sucrose was the most suitable condition for bio-floc formation in P. monodon culture system,which could promote the growth of P. monodon.
出处
《南方水产科学》
CAS
CSCD
北大核心
2014年第3期29-37,共9页
South China Fisheries Science
基金
现代农业(虾)产业技术体系建设专项资金(CARS-47)
国家高技术研究发展计划(863计划)项目(2012AA10A409)
广东省海洋渔业推广专项(A201201B02
A201201C01)
广东省农业科技成果转化资金项目(2012NL026)
广西科技成果转化项目(1346004-6)
中国水产科学研究院基本科研业务费项目(2013A0502)
关键词
生物絮团
斑节对虾
碳源
特定生长率
成活率
bio-floc
Penaeus monodon
carbon source
special growth rate
survival rate
