本试验旨在研究饲料中添加不同梯度珍珠露水草提取物(CA)对罗氏沼虾生长、蛋白质代谢和肌肉营养成分的影响。以基础饲料为对照组,分别于基础饲料中添加7.5、67.5 mg/kg CA,共配制3种等氮等能饲料,饲养试验为期8周。试验表明:基础饲料中添加7.5 mg/kg CA对罗氏沼虾的生长性能、饲料利用率、肠道及肝脏消化酶(蛋白酶、脂肪酶和淀粉酶)活性、肝脏转氨酶(丙氨酸氨基转移酶和天门冬氨酸氨基转移酶)活性、肌肉常规营养成分(水分、粗蛋白、粗脂肪、和粗灰分)和肌肉脂肪酸组成均无明显影响;而添加67.5 mg/kg CA显著提高了罗氏沼虾的生长性能、饲料利用率、肠道蛋白酶活性、肝脏天门冬氨酸氨基转移酶活性和肌肉中呈味氨基酸(天冬氨酸、谷氨酸和甘氨酸)及粗蛋白的含量。结果表明,饲料中添加低剂量7.5 mg/kg CA对罗氏沼虾生长、饲料利用率、蛋白质代谢和肌肉营养成分无明显影响,而添加高剂量67.5 mg/kg CA显著改善罗氏沼虾生长性能、蛋白质代谢和肌肉风味。
Abstract
The paper aims to study the effects of adding different concentrations of Cyanotis arachnoidea (CA) extracts in feed on the growth, protein metabolism and nutritional components in muscle of Macrobrachium rosenbergii. Adding 7.5, 67.5 mg/kg CA to the basic diet which was the control group, we made 3 kinds of feed with equal energy and nitrogen, and did the feeding test for 8 weeks. The results showed that: adding 7.5 mg/kg CA in basic diet had no significant effect on the growth performance, feed utilization, enteric and hepatic digestive enzyme (protease, lipase and amylase) activities, hepatic aminotransferase (alanine aminotransferase and aspartate aminotransferase) activities, muscular nutrient composition (moisture, crude protein, crude lipid and ash) and muscular fatty acids contents; however, adding 67.5 mg/kg CA significantly improved the growth performance, feed utilization, enteric protease activity, hepatic AST activity and muscular delicious amino acids (aspartic acid, glutamic acid and glycine) and crude protein contents of Macrobrachium rosenbergii.
关键词
珍珠露水草;β–蜕皮激素;罗氏沼虾;生长性能;蛋白质代谢;营养成分
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Key words
Cyanotis arachnoidea; β–ecdysone; Macrobrachium rosenbergii; growthSperformance; protein metabolism; nutrient composition
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