發(fā)布時(shí)間：2018-02-28 20:34

  本文關(guān)鍵詞： 棉籽粕 凈能 肉鴨 常規(guī)成分 預(yù)測(cè)　出處：《動(dòng)物營(yíng)養(yǎng)學(xué)報(bào)》2017年01期 　論文類型：期刊論文

【摘要】：本研究旨在評(píng)定棉籽粕在英系北京鴨上的凈能(NE),并運(yùn)用棉籽粕的表觀代謝能(AME)和常規(guī)成分建立其預(yù)測(cè)方程。根據(jù)析因法將棉籽粕替代飼糧的NE剖分為維持凈能(NEm)和生產(chǎn)凈能(NEp),利用回歸法測(cè)定NEm,比較屠宰法測(cè)定NEp,再套算得到棉籽粕的NE。選取400只7日齡的英系北京鴨進(jìn)行動(dòng)物試驗(yàn)。首先選取20只肉鴨在試驗(yàn)開(kāi)始時(shí)挫頸致死,測(cè)定其體能量作為測(cè)定NEm和NEp的共同初始能量對(duì)照;再選取50只肉鴨用于NEm的測(cè)定,NEm用禁食產(chǎn)熱(FHP)估計(jì),共設(shè)5個(gè)組(每組5個(gè)重復(fù),每個(gè)重復(fù)2只),分別為自由采食組及限飼15%、25%、35%、45%組,均飼喂基礎(chǔ)飼糧1;剩余的330只肉鴨用于NEp的測(cè)定,共設(shè)33個(gè)組(每組5個(gè)重復(fù),每個(gè)重復(fù)2只),分別飼喂基礎(chǔ)飼糧2和以不同棉籽粕替代15%基礎(chǔ)飼糧2的試驗(yàn)飼糧。于14日齡時(shí)將所有的試?guó)喆祛i致死,測(cè)定所有試?guó)喌捏w能量。最后,將實(shí)測(cè)棉籽粕NE與AME和其常規(guī)成分進(jìn)行相關(guān)分析和多元逐步線性回歸分析建立棉籽粕NE的預(yù)測(cè)方程。結(jié)果顯示:英系北京鴨的FHP為580.7 k J/(kg BW0.75·d),棉籽粕替代飼糧提供給肉鴨的NEm和NEp分別為(2.97±0.15)MJ/kg和(5.22±0.12)MJ/kg,棉籽粕替代飼糧提供給肉鴨的NE為(8.19±0.09)MJ/kg,計(jì)算得到的棉籽粕的NE和AME分別為(6.12±0.62)MJ/kg和(10.05±1.02)MJ/kg,AME轉(zhuǎn)化為NE的效率為(60.97±2.04)%,使用AME和常規(guī)成分建立棉籽粕NE的最佳預(yù)測(cè)方程為NE=3.276+0.241AME+0.044CP-0.081ADF[決定系數(shù)(R2)=0.954,殘余標(biāo)準(zhǔn)差(RSD)=0.13 M J/kg,P0.01],式中CP為粗蛋白質(zhì),ADF為酸性洗滌纖維。由以上結(jié)果可知:英系北京鴨棉籽粕的NE為(6.12±0.62)MJ/kg,分布范圍為5.04~7.30 M J/kg,變異較大;運(yùn)用AM E結(jié)合常規(guī)成分可以準(zhǔn)確預(yù)測(cè)英系北京鴨棉籽粕的NE。
[Abstract]:The purpose of this study was to evaluate the net energy of cottonseed meal on British Peking duck, and to establish its prediction equation by using the apparent metabolic energy (AMEE) of cottonseed meal and its conventional components. According to the factorization method, the NE-section of cottonseed meal instead of diet was subdivided to maintain net energy NEm. Nemin was determined by regression method, NEP was determined by comparative slaughter method, and NEP of cottonseed meal was calculated. 400 British Peking ducks aged 7 days were selected for animal experiment. First, 20 meat ducks were killed at the beginning of the experiment. The body energy was measured as the common initial energy control for the determination of NEm and NEp, and 50 meat ducks were selected for NEm determination. Each of the three groups was fed with basic diet 1, and the remaining 330 ducks were used for the determination of NEp, with 33 groups (5 replicates in each group), respectively, in the free feeding group and in the control group, which were fed with 35% and 45% of the total number of rats, and the rest 330 ducks were used for the determination of NEp, and there were 3 groups (5 replicates in each group). The experimental diets fed with basal diet 2 and different cottonseed meal instead of 15% basal diet 2 were fed to each duplicate of 2. All the tested ducks were killed at 14 days of age, and the physical capacity of all the tested ducks was measured. The correlation analysis and stepwise linear regression analysis between NE and AME and their conventional components in cottonseed meal were carried out, and the prediction equation of NE in cottonseed meal was established. The results showed that the FHP of British Peking duck was 580.7 k / kg BW0.75 路dl, and cottonseed meal was used as a substitute for diet. The NEm and NEp of meat duck were 2.97 鹵0.15 MJ / kg and 5.22 鹵0.12 MJ / kg, respectively. The NE of cottonseed meal substitute diet for meat duck was 8.19 鹵0.09 MJ / kg. The NE and AME of cottonseed meal were 6.12 鹵0.62MJ / kg and 10.05 鹵1.02MJ / kg respectively. The efficiency of converting NE into NE was 60.97 鹵2.04N / kg, respectively. The best prediction equation was NE=3.276 0.241 AME 0.044 CP-0.081 ADF [determination coefficient R2N 0.954, residual standard deviation 0.13 MJ / kg, P0.01], in which CP was crude protein and ADF was acidic washing fiber. From the above results, the NE of British Beijing duck cottonseed meal was 6.12 鹵0.62MJ / kg, the distribution range was 5.040.30 MJ / kg, and the variation was great. The application of AM E combined with conventional components can accurately predict the NES of cotton seed meal of British Peking duck.
【作者單位】： 四川農(nóng)業(yè)大學(xué)動(dòng)物營(yíng)養(yǎng)研究所;西藏職業(yè)技術(shù)學(xué)院;
【基金】：四川省科技支撐計(jì)劃(2013NZ0054) 四川農(nóng)業(yè)大學(xué)雙支計(jì)劃
【分類號(hào)】：S816

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