發(fā)布時(shí)間：2018-11-08 15:13

【摘要】：本試驗(yàn)旨在研究飼糧添加不同水平酵母硒對愛拔益加(AA)肉仔雞生長性能、血液血紅蛋白含量和紅細(xì)胞壓積、血漿生化指標(biāo)、器官指數(shù)和組織結(jié)構(gòu)變化的影響,進(jìn)而評價(jià)酵母硒對肉仔雞的生物安全性。試驗(yàn)采用單因子完全隨機(jī)設(shè)計(jì),選用288只1日齡AA肉仔雞,隨機(jī)分為4個組,每個組6個重復(fù),每個重復(fù)12只雞(公母各占1/2)。各組分別在玉米-豆粕型基礎(chǔ)飼糧中添加0、0.4、2.4和4.9 mg/kg(以硒計(jì))的酵母硒試驗(yàn)。試驗(yàn)期為42 d。結(jié)果表明:1)與對照組相比,飼糧添加0.4和2.4 mg/kg酵母硒顯著提高了22~42日齡肉仔雞平均日采食量(P0.05);飼糧添加0.4、2.4和4.9 mg/kg酵母硒顯著提高了1~42日齡肉仔雞平均日增重(P0.05),而各酵母硒添加組之間差異不顯著(P0.05)。2)飼糧添加不同水平酵母硒除對21日齡肉仔雞血漿尿素氮含量和谷胱甘肽過氧化物酶(GSH-Px)活性以及42日齡肉仔雞血漿GSH-Px活性有顯著影響(P0.05)外,對其他血漿生化指標(biāo)均無顯著影響(P0.05)。與對照組相比,各酵母硒添加組21和42日齡肉仔雞血漿GSH-Px活性隨著酵母硒添加水平的增加均顯著提高(P0.05),且飼糧添加2.4 mg/kg酵母硒顯著降低了21日齡肉仔雞血漿尿素氮含量(P0.05)。3)飼糧添加不同水平酵母硒對21和42日齡肉仔雞血液血紅蛋白含量和紅細(xì)胞壓積及42日齡肉仔雞器官指數(shù)均無顯著影響(P0.05),且并未引起主要器官的組織結(jié)構(gòu)變化。綜上所述,肉仔雞飼糧中酵母硒的添加水平為0.4 mg/kg(飼糧中總硒含量為0.41 mg/kg)時(shí),具有10倍的安全系數(shù),即飼糧中以酵母硒形式添加硒對肉仔雞是安全的。
[Abstract]:The purpose of this study was to study the effects of different dietary levels of yeast selenium on growth performance, hemoglobin content and hematocrit, plasma biochemical index, organ index and tissue structure of Ebor plus (AA) broilers. Then the biological safety of yeast selenium to broilers was evaluated. A single factor complete randomized design was used. 288 1-day-old AA broilers were randomly divided into 4 groups with 6 replicates in each group and 12 chickens per replica (male and female, 1 / 2 each). The experiment of yeast selenium in each group was carried out by adding 0 ~ 0.4g ~ (2.4) and 4.9 mg/kg (in selenium) respectively into corn-soybean basal diet. The experimental period is 42 days. The results showed that: 1) compared with the control group, dietary supplementation of 0.4 and 2.4 mg/kg yeast selenium significantly increased the average daily intake of 22 ~ 42-day-old broilers (P0.05); Dietary supplementation with yeast selenium of 0.4 and 4.9 mg/kg significantly increased the average daily gain of 1-42-day-old broilers (P0.05). However, there was no significant difference among the yeast selenium supplementation groups (P0.05). 2) the dietary supplementation of different levels of yeast selenium had no effect on plasma urea nitrogen content and glutathione peroxidase (GSH-Px) activity and 42 days in 21-day-old broilers. The plasma GSH-Px activity of broilers was significantly affected (P0.05). There was no significant effect on other plasma biochemical indexes (P0.05). Compared with the control group, the plasma GSH-Px activity of 21 and 42 day-old broilers increased significantly with the increase of yeast selenium (P0.05). Addition of 2. 4 mg/kg yeast selenium to diet significantly decreased plasma urea nitrogen content in 21-day-old broilers (P0.05). 3. Dietary supplementation of different levels of yeast selenium on hemoglobin and red blood of 21-day-old broilers and 42-day-old broilers Cell compaction and organ index of 42-day-old broilers were not significantly affected (P0.05). And did not cause the main organ tissue structure change. To sum up, the addition level of yeast selenium to broiler diet was 0. 4 mg/kg (total selenium content in diet was 0. 41 mg/kg), the safety factor was 10 times, that is to say, it was safe for broilers to add selenium in the form of yeast selenium in diet.
【作者單位】： 甘肅農(nóng)業(yè)大學(xué)動物科學(xué)技術(shù)學(xué)院;中國農(nóng)業(yè)科學(xué)院北京畜牧獸醫(yī)研究所礦物元素營養(yǎng)研究室;
【基金】：農(nóng)產(chǎn)品質(zhì)量安全監(jiān)管(飼料質(zhì)量安全監(jiān)管)項(xiàng)目 國家現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系崗位專家專項(xiàng)經(jīng)費(fèi)(CARS-42) 中國農(nóng)業(yè)科學(xué)院科技創(chuàng)新工程專項(xiàng)經(jīng)費(fèi)(ASTIP-IAS08)
【分類號】：S831.5

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