【摘要】：短鏈酮酸是動(dòng)物機(jī)體代謝的中間產(chǎn)物,可以促進(jìn)畜禽的生長。前期試驗(yàn)表明短鏈酮酸可以提高三黃雞、AA肉雞及育肥豬的采食和增重。本試驗(yàn)在前期研究基礎(chǔ)上,進(jìn)行兩個(gè)試驗(yàn):一、以斷奶仔豬為試驗(yàn)動(dòng)物,研究短鏈酮酸對斷奶仔豬生長性能和血清生化指標(biāo)的影響,確定其在斷奶仔豬日糧中的適宜添加量。二、以育肥豬為試驗(yàn)動(dòng)物,研究不同時(shí)間添加短鏈酮酸對育肥豬生長性能和血清生化指標(biāo)的影響。為短鏈酮酸在畜牧生產(chǎn)上應(yīng)用提供理論依據(jù)和應(yīng)用參數(shù)。試驗(yàn)一、短鏈酮酸對斷奶仔豬生長及血清指標(biāo)的影響選取健康、體重相近的30日齡長×大二元雜交斷奶仔豬180頭,分為3組,每組3個(gè)重復(fù),每個(gè)重復(fù)20頭豬,各組公母豬比例一致,試驗(yàn)期50d。對照組飼喂基礎(chǔ)日糧,兩個(gè)試驗(yàn)組分別在日糧中添加0.3%和0.4%的短鏈酮酸產(chǎn)品。分別于試驗(yàn)第1d和第50d早晨對斷奶仔豬空腹稱重,以重復(fù)為單位統(tǒng)計(jì)各階段的耗料量,并計(jì)算平均日增重、平均日采食量和料重比。試驗(yàn)結(jié)束時(shí)空腹采血,用于測定血清指標(biāo)。結(jié)果表明:與對照組相比,兩個(gè)試驗(yàn)組斷奶仔豬血清球蛋白和高密度脂蛋白含量升高,尿素氮含量降低;0.4%短鏈酮酸組血清低密度脂蛋白和總膽固醇含量顯著高于對照組(P0.05);另外,短鏈酮酸還具有提高斷奶仔豬血清免疫球蛋白含量的趨勢;但短鏈酮酸對斷奶仔豬生長性能無顯著影響。綜上所述,短鏈酮酸能夠改善斷奶仔豬血清指標(biāo)和免疫指標(biāo),本試驗(yàn)條件下以日糧添加0.4%短鏈酮酸較為適宜。試驗(yàn)二、不同時(shí)間添加短鏈酮酸對育肥豬生長及血清指標(biāo)的影響選取健康、體重相近的100日齡長×大二元雜育肥豬264頭,分為4組,每組3個(gè)重復(fù),每個(gè)重復(fù)22頭豬,各組公母豬比例一致,試驗(yàn)期60d。對照組飼喂基礎(chǔ)日糧,三個(gè)試驗(yàn)組在日糧中添加0.4%的短鏈酮酸產(chǎn)品,分別于試驗(yàn)第1、21和41d開始飼喂。在試驗(yàn)第1d和第61d早晨對育肥豬空腹稱重,以重復(fù)為單位統(tǒng)計(jì)各階段的耗料量,并計(jì)算平均日增重、平均日采食量和料重比。試驗(yàn)結(jié)束時(shí)空腹采血,用于測定血清指標(biāo)。結(jié)果表明:與對照組相比,第1、21和41d添加組平均日增重分別提高9.61%(P0.05)、10.13%(P0.05)和3.12%(P0.05),平均日采食量分別提高4.95%(P0.05)、6.20%(P0.05)和5.32%(P0.05);另外,第1d添加組和第21d添加組血清白蛋白、高密度脂蛋白、游離三碘甲腺原氨酸和游離四碘甲腺原氨酸含量具有升高的趨勢。綜上所述,短鏈酮酸可以促進(jìn)育肥豬采食,提高其增重和飼料轉(zhuǎn)化效率,同時(shí)對甲狀腺激素分泌具有一定的促進(jìn)作用;本試驗(yàn)條件下,第21d添加組達(dá)到了全期添加的促長效果,減少了短鏈酮酸的飼喂時(shí)間,使飼料成本降低,不同時(shí)間飼喂以該組效果較好。
[Abstract]:Short chain ketoacid is the intermediate product of animal metabolism, which can promote the growth of livestock and poultry. Previous experiments showed that short chain ketoacid could improve the feed intake and weight gain of Sanhuang chicken, AA broilers and fattening pigs. On the basis of the previous study, two experiments were carried out: first, the effects of short chain ketoacid on the growth performance and serum biochemical indexes of weanling piglets were studied, and the suitable addition amount in the diet of weanling piglets was determined. Second, using fattening pigs as experimental animals, the effects of adding short chain ketoacid at different time on growth performance and serum biochemical indexes of fattening pigs were studied. It provides theoretical basis and application parameters for the application of short chain ketoacid in livestock production. Experiment 1. Effects of short chain ketoacid on growth and serum indexes of weanling piglets 180 weanling piglets of 30 days old 脳 big binary hybrid weanling with similar body weight were divided into 3 groups with 3 repeats in each group and 20 pigs in each group. The proportion of sows in each group was the same, and the experimental period was 50 days. The control group was fed with basic diet, and the two groups were fed with 0.3% and 0.4% short chain ketoacid products, respectively. The weanling piglets were weighed on an empty stomach on the morning of the first and 50th day of the experiment, and the feed consumption of each stage was counted by repetition, and the average daily gain, average daily feed intake and feed weight ratio were calculated. At the end of the experiment, blood was collected on an empty stomach for the determination of serum indexes. The results showed that compared with the control group, the contents of serum globulin and high density lipoprotein increased and the content of urea nitrogen decreased in the weanling piglets of the two groups. The contents of serum low density lipoprotein and total cholesterol in 0.4% short chain ketoacid group were significantly higher than those in control group (P 0.05). In addition, short chain ketoacid also had the trend of increasing serum immunoglobulin content in weanling piglets. However, short chain ketoacid had no significant effect on the growth performance of weanling piglets. In conclusion, short chain ketoacid can improve the serum index and immune index of weanling piglets, and it is more suitable to add 0.4% short chain ketoacid to diet under the condition of this experiment. In experiment 2, the effects of adding short chain ketoacid at different time on the growth and serum indexes of fattening pigs were divided into 4 groups with 3 repeats in each group, 22 pigs in each group. The proportion of sows in each group was the same, the experimental period was 60 days. The control group was fed with basic diet, and the three trial groups were fed with 0.4% short chain ketoacid products on the 1st, 21st and 41st day of the trial, respectively. On the morning of the 1st and 61st day of the experiment, the fattening pigs were weighed on an empty stomach, and the feed consumption of each stage was counted by repetition, and the average daily gain, average daily feed intake and feed weight ratio were calculated. At the end of the experiment, blood was collected on an empty stomach for the determination of serum indexes. The results showed that compared with the control group, the average daily gain of the treatment group increased by 9.61% (P05), 10.13% (P05) and 3.12% (P05) on the 1st, 21st and 41d, respectively. The average daily feed intake increased by 4.95% (P05), 6.20% (P05) and 5.32% (P05), respectively. In addition, the contents of serum albumin, high density lipoprotein, free triiodothyronine and free tetraiodothyronine increased in the 1st and 21th day groups. To sum up, short chain ketoacid can promote the feeding of fattening pigs, improve its weight gain and feed conversion efficiency, and promote thyroid hormone secretion to a certain extent. Under the condition of this experiment, the 21th day addition group achieved the effect of promoting the growth of the whole period, reduced the feeding time of short chain ketoacid, and reduced the feed cost, and the effect of this group was better at different time.
【學(xué)位授予單位】：東北農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：S828.5

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