摘要
为探讨不同日粮水平对对虾的影响。本实验研究了日粮水平对凡纳滨对虾生长、酶活力及和氮收支的影响。结果表明：日粮水平对凡纳滨对虾存活率、增重率、饲料系数、生长率、氮收支、部分消化酶和免疫酶活性有显著的影响；日粮水平7％增重率和特定生长率较高，日粮水平9％存活率最低，日粮水平2％饲料系数最低；日粮水平与特定生长率间呈二次曲线相关，日粮水平为7．92％时，获得最大特定生长率。摄食氮、生长氮和排泄氮和排粪氮，以日粮水平2％最低、7％最高，且2％日粮水平氮生长效率最高；低日粮水平组获得较低的消化酶和免疫酶活性。在对虾养殖生产实践中，日粮水平设定为7％～8％为宜。
In order to study the effect of ration level on Shrimp, ration levels on growth characteristics, digestive enzymes, immune enzyme and nitrogen balance of Litopenaeus vannamei was studied. The results indicated that ration level significantly affected the survival rate, weight increasing rate, feed coefficient, growth rate, the nitrogen balance, part of digestive enzymes and immune enzymes activity. Weight increasing rate and specific growth rate were highest in 7% of ration level, survival rate was lowest in 9% of ration level, feed coefficient was lowest in 2% of ration level. A curves relationship existed between ration level and specific growth rate, and specific growth rate was highest in 7.92% of ration level. Feeding nitrogen, growth nitrogen, excretion nitrogen and fecal nitrogen were lowest in 2% of ration level and highest in 7% of ration level significantly. Low ration levels got low digestive enzymes and immune enzymes activity. Therefore, the optimal ration level should be 7%-8%.
出处
《中国农学通报》
CSCD
2014年第20期26-29,共4页
Chinese Agricultural Science Bulletin
基金
广东省科技计划项目"对虾养殖污染控制与质量安全保证技术研究"(2012A020602050)
广东省海洋渔业科技推广专项"对虾集约化养殖的可控生态调控研究"(A201201C01)
广东省海洋渔业科技推广专项"流沙湾养殖容量与环境影响效应研究"(A201201I02)
广东省科技计划项目"流沙湾生物多样性与生态系统健康评价研究"(2011B031100012)
关键词
日粮水平
消化酶
免疫酶
氮收支
凡纳滨对虾
ration level
digestive enzymes
immune enzymes
nitrogen budget
Litopenaeus vannamei
