农学学报
農學學報
농학학보
Chinese Countryside Well-off Technology
2012年
10期
58-61
,共4页
饲料镉%罗非鱼%生长性能%消化酶
飼料鎘%囉非魚%生長性能%消化酶
사료력%라비어%생장성능%소화매
Dietary Cd%Tilapia%Growing Performance%Digestive Enzyme Activities
为研究不同水平饲料镉对罗非鱼生长性能和肠道消化酶活性的影响。将300尾罗非鱼随机分为5个处理,饲料镉添加水平分别为0、50、100、200、400mg/kg,试验期为8周。结果表明：与对照组相比,饲料镉添加组增重率和特定生长率均逐渐降低,200、400mg/kg添加水平组显著降低（P〈0.05）;各处理组之间摄食率、饲料系数和成活率均无显著差异（P〉0.05）。饲料镉添加水平组罗非鱼肠道淀粉酶活性和蛋白酶活性均显著低于对照组（P〈0.05）,当饲料中添加50mg/kg镉时,罗非鱼肠道淀粉酶活性和蛋白酶活性即可显著降低（P〈0.05）;罗非鱼脂肪酶活性仅在饲料镉添加水平400mg/kg时显著低于对照组（P〈0.05）,其余各处理组间差异不显著（P〉0.05）。表明罗非鱼对饲料镉耐受程度较高,饲料中镉达到200mg/kg时,才可显著影响罗非鱼增重率和特定生长率。饲料中不同水平镉对罗非鱼肠道消化酶活性具有不同程度的抑制作用,饲料中添加50mg/kg镉时即可显著降低肠道淀粉酶和蛋白酶的活性,肠道脂肪酶活性仅在400mg/kg时显著降低。
為研究不同水平飼料鎘對囉非魚生長性能和腸道消化酶活性的影響。將300尾囉非魚隨機分為5箇處理,飼料鎘添加水平分彆為0、50、100、200、400mg/kg,試驗期為8週。結果錶明：與對照組相比,飼料鎘添加組增重率和特定生長率均逐漸降低,200、400mg/kg添加水平組顯著降低（P〈0.05）;各處理組之間攝食率、飼料繫數和成活率均無顯著差異（P〉0.05）。飼料鎘添加水平組囉非魚腸道澱粉酶活性和蛋白酶活性均顯著低于對照組（P〈0.05）,噹飼料中添加50mg/kg鎘時,囉非魚腸道澱粉酶活性和蛋白酶活性即可顯著降低（P〈0.05）;囉非魚脂肪酶活性僅在飼料鎘添加水平400mg/kg時顯著低于對照組（P〈0.05）,其餘各處理組間差異不顯著（P〉0.05）。錶明囉非魚對飼料鎘耐受程度較高,飼料中鎘達到200mg/kg時,纔可顯著影響囉非魚增重率和特定生長率。飼料中不同水平鎘對囉非魚腸道消化酶活性具有不同程度的抑製作用,飼料中添加50mg/kg鎘時即可顯著降低腸道澱粉酶和蛋白酶的活性,腸道脂肪酶活性僅在400mg/kg時顯著降低。
위연구불동수평사료력대라비어생장성능화장도소화매활성적영향。장300미라비어수궤분위5개처리,사료력첨가수평분별위0、50、100、200、400mg/kg,시험기위8주。결과표명：여대조조상비,사료력첨가조증중솔화특정생장솔균축점강저,200、400mg/kg첨가수평조현저강저（P〈0.05）;각처리조지간섭식솔、사료계수화성활솔균무현저차이（P〉0.05）。사료력첨가수평조라비어장도정분매활성화단백매활성균현저저우대조조（P〈0.05）,당사료중첨가50mg/kg력시,라비어장도정분매활성화단백매활성즉가현저강저（P〈0.05）;라비어지방매활성부재사료력첨가수평400mg/kg시현저저우대조조（P〈0.05）,기여각처리조간차이불현저（P〉0.05）。표명라비어대사료력내수정도교고,사료중력체도200mg/kg시,재가현저영향라비어증중솔화특정생장솔。사료중불동수평력대라비어장도소화매활성구유불동정도적억제작용,사료중첨가50mg/kg력시즉가현저강저장도정분매화단백매적활성,장도지방매활성부재400mg/kg시현저강저。
300 tilapias were used to investigate the effects of different level of dietary Cd on growth, digestive enzyme activities of tilapia intestinal tract, which were divided into 5 groups with four replicates in each group and exposed to dietary Cd at concentrations of 0, 50, 100, 200, 400 mg/kg for 8 weeks. Compared with the control group, the weight gain rate and specific growth rate were both decreased significantly in 200, 400 mg/kg Cd group (P〈0.05); No significant difference in the feed rate, feed conversion rate and survival rate were found among all groups(P〉0.05); The activities of amylase and protease in intestinal tract were decreased significantly when the level of dietary Cd was 50 mg/kg (P〈0.05), the activity of lipase in intestinal tract was decreased significantly only in 400 mg/kg Cd group (P〈0.05). It suggested that tilapia had strong tolerance to dietary Cd, the weight gain rate and specific growth rate could be restrained significantly in 200 mg/kg Cd group. And the activities of amylase and protease were decreased in 50 mg/kg group significantly, the activity of lipase decreased only in 400 mg/kg group.
