【摘要】：本試驗旨在研究飼糧中蘇氨酸水平對30~38周齡臨武鴨產(chǎn)蛋性能、蛋品質(zhì)和血清生化指標(biāo)的影響,以確定臨武鴨產(chǎn)蛋高峰期的蘇氨酸需要量。試驗選取體重相近,健康狀況良好、產(chǎn)蛋率無顯著差異(P0.05)的臨武鴨200只,隨機分為5組,每組5個重復(fù),每個重復(fù)8只鴨。各組飼糧中蘇氨酸水平分別為0.55%、0.60%、0.65%、0.70%和0.75%。試驗期63 d。結(jié)果表明:1)0.65%蘇氨酸水平組的料蛋比顯著低于0.55%蘇氨酸水平組(P0.05)。飼糧中蘇氨酸水平對平均日采食量、產(chǎn)蛋率、平均蛋重和日產(chǎn)蛋量均無顯著影響(P0.05)。2)0.65%、0.70%和0.75%蘇氨酸水平組的蛋白高度和哈氏單位顯著高于0.55%蘇氨酸水平組(P0.05)。飼糧中蘇氨酸水平對蛋形指數(shù)、蛋殼厚度、蛋黃色澤、蛋黃比例、蛋殼比例和蛋白比例均無顯著影響(P0.05)。3)0.70%蘇氨酸水平組血清中總蛋白含量顯著高于0.55%蘇氨酸水平組(P0.05)。0.65%蘇氨酸水平組血清中谷丙轉(zhuǎn)氨酶活性顯著高于0.55%蘇氨酸水平組(P0.05)。0.65%、0.70%和0.75%蘇氨酸水平組血清中尿素氮含量顯著低于0.55%和0.60%蘇氨酸水平組(P0.05)。飼糧中蘇氨酸水平對血清中白蛋白、總膽固醇、甘油三酯、尿酸、肌酐含量及堿性磷酸酶、谷草轉(zhuǎn)氨酶活性無顯著影響(P0.05)。4)二次曲線分析結(jié)果表明,分別以料蛋比和血清尿素氮含量為評價指標(biāo),產(chǎn)蛋高峰期臨武鴨蘇氨酸需要量分別為0.67%和0.69%。由此可見,飼糧中適宜水平的蘇氨酸能夠提高臨武鴨產(chǎn)蛋性能、蛋品質(zhì)和機體蛋白質(zhì)利用率。綜合這些指標(biāo),產(chǎn)蛋高峰期(30~38周齡)臨武鴨飼糧中蘇氨酸適宜水平為0.67%~0.69%。
[Abstract]:The purpose of this experiment was to study the effects of dietary threonine level on egg laying performance, egg quality and serum biochemical indexes of Linwu ducks at 30 ~ 38 weeks of age, in order to determine the threonine requirement in the peak period of laying of Linwu duck. 200 Linwu ducks with similar body weight, good health and no significant difference in laying rate (P0.05) were randomly divided into 5 groups, 5 replicates in each group and 8 ducks in each replica. The levels of threonine in the diet of each group were 0.55 and 0.600.65, 0.70% and 0.75, respectively. The experimental period was 63 days. The results showed that: 1) the feed to egg ratio of 0.65% threonine group was significantly lower than that of 0.55% threonine level group (P0.05). The dietary threonine level had no significant effect on average daily feed intake, egg laying rate, average egg weight and daily egg production (P0.05) 0.65. The protein height and hardy unit of 0.70% and 0.75% threonine group were significantly higher than that of 0.55% threonine level group (P0.05). The effects of dietary threonine level on egg shape index, egg shell thickness, yolk color, yolk ratio, There was no significant effect on egg shell ratio and protein ratio (P0.05). The serum total protein content in 0.70% threonine group was significantly higher than that in 0.55% threonine group (P0.05). The activity of glutamate-pyruvic transaminase in serum was significantly higher in the group of 0.55% threonine than that in the group of 0.55% threonine (P0.05). The levels of serum urea nitrogen in 0.70% and 0.75% threonine groups were significantly lower than those in 0.55% and 0.60% threonine groups (P0.05). Serum albumin, total cholesterol, triglyceride, uric acid, creatinine content, alkaline phosphatase and glutamic oxaloacetic transaminase activity were not significantly affected by dietary threonine levels (P0.05). The ratio of feed to egg and the content of serum urea nitrogen were used as evaluation indexes, and the threonine requirements of Linwu duck were 0.67% and 0.69% respectively. Therefore, the suitable level of threonine in diet could improve the laying performance, egg quality and protein utilization rate of Linwu duck. Combined with these indexes, the suitable level of threonine in the diet of Linwu duck was 0.67 and 0.69, respectively, in the peak period of laying eggs (30 ~ 38 weeks old).
【作者單位】： 湖南省畜牧獸醫(yī)研究所動物營養(yǎng)與飼養(yǎng)技術(shù)研究室;湖南畜禽安全生產(chǎn)協(xié)同創(chuàng)新中心;中國農(nóng)業(yè)科學(xué)院麻類研究所;
【基金】：國家水禽產(chǎn)業(yè)技術(shù)體系建設(shè)專項資金(CARS-43-39) 中國農(nóng)業(yè)科學(xué)院農(nóng)業(yè)科學(xué)與技術(shù)創(chuàng)新工程專項資金(ASTIP-IBFC02) 湖南畜禽安全生產(chǎn)協(xié)同創(chuàng)新中心專項資金(CICAPS)
【分類號】：S834.5

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