本文選題：鋅 + 植酸酶��； 參考：《動物營養(yǎng)學(xué)報》2017年07期

【摘要】：本試驗旨在研究低鋅水平秸稈飼糧中添加植酸酶對5~16周齡五龍鵝生長性能、脛骨發(fā)育及抗氧化能力的影響。選用5周齡五龍鵝360只,隨機(jī)分為6組,每組6個重復(fù),每個重復(fù)10只(公母各占1/2)。Ⅰ組為對照組,飼喂基礎(chǔ)飼糧(添加75 mg/kg硫酸鋅,未添加植酸酶);ⅡⅥ組在基礎(chǔ)飼糧的中分別添加0、15、30、45、60 mg/kg硫酸鋅,且均添加1 200 U/kg植酸酶。試驗期12周。結(jié)果表明:1)Ⅳ、Ⅴ組的體重和平均日增重均極顯著高于Ⅰ、Ⅱ組(P0.01),Ⅳ組的平均日采食量顯著或極顯著高于Ⅰ、Ⅱ組(P0.05或P0.01),Ⅳ、Ⅴ組的料重比顯著或極顯著低于Ⅰ、Ⅱ組(P0.05或P0.01)。由曲線回歸方程得出,飼糧中硫酸鋅的添加水平為60.50 mg/kg時平均日增重最大;飼糧中硫酸鋅的添加水平為43.44 mg/kg時料重比最低。2)ⅢⅥ組的屠宰率顯著或極顯著高于Ⅰ、Ⅱ組(P0.05或P0.01),Ⅱ組的半凈膛率顯著低于其他組(P0.05)。3)ⅣⅥ組的骨密度(BMD)顯著或極顯著高于Ⅱ組(P0.05或P0.01),ⅣⅥ組的骨中鈣、磷含量顯著或極顯著高于Ⅰ、Ⅱ組(P0.05或P0.01)。4)ⅣⅥ組血清和肝臟總抗氧化能力(T-AOC)顯著或極顯著高于Ⅱ組(P0.05或P0.01),飼糧中硫酸鋅的添加水平為45mg/kg時,血清和肝臟的總抗氧化能力最高。由此可見,低鋅水平秸稈飼糧中添加植酸酶提高了516周齡鵝的生長性能,促進(jìn)了脛骨發(fā)育,增強(qiáng)了機(jī)體抗氧化能力。飼糧中添加植酸酶能夠通過提高鋅的生物學(xué)效價,降低飼糧中硫酸鋅的添加水平。在飼糧中添加1 200 U/kg植酸酶的條件下,飼糧中硫酸鋅的適宜添加水平為4060 mg/kg。
[Abstract]:The purpose of this study was to study the effects of phytase supplementation on the growth performance, tibia development and antioxidant capacity of 56-week-old Wulong geese. A total of 360 five-week-old Wulong geese were randomly divided into 6 groups with 6 repeats in each group and 10 replicates in each group (male and female: 1 / 2). Group I was fed with basic diet (75 mg/kg zinc sulfate added). No phytase was added to the basal diet, and zinc sulfate was added to the basal diet for 1 200 U / kg phytase for 4 560 mg/kg. The trial period was 12 weeks. The results showed that the body weight and average daily gain of group 鈪，

本文編號：2033298