维普中文期刊产品整合服务

Determination of basal ileal endogenous losses and standardized ileal digestibility of amino acids in barley fed to growing pigs

查看全文 作　　者：Hanna Katharina [1]Spindler;Rainer [1]Mosenthin;Pia [1]Rosenfelder;Henry J?[2]rgensen;Knud Erik Bach [2]Knudsen;Meike [1]Eklund 高影响力作者 机构地区：[1]University of Hohenheim,Institute of Animal Science;[2]Aarhus University,Department of Animal Science,Research Center Foulum高影响力机构 出　　处：《Journal of Animal Science and Biotechnology》索引2017年第8卷第1期,共9页高影响力期刊 基　　金：supported in the framework of Grain Up by funds of the Federal Ministry of Food,Agriculture;Consumer Protection(BMELV)based on a decision of the Parliament of the Federal Republic of Germany via the Federal Office for Agriculture Food and(BLE)under the innovation support program 摘　　要：Background: Basal ileal endogenous amino acid(AA) losses(IAA_(end)) and standardized ileal digestibility(SID) values of cereal grains, such as barley, are apparently underestimated when determined according to the nitrogen(N)-free method. Regression analysis between the dietary apparent ileal digestible content(c AID) and total crude protein(CP) and AA can be considered as alternative approach to obtain more accurate values for IAA_(end)and SID of AA in cereal grains.Methods: Eight hulled barley genotypes were used, with barley being the only source of CP and AA in the assay diets. The diets contained 95 % as-fed of these eight barley genotypes each, ranging in CP content between 109.1 and 123.8 g/kg dry matter(DM). Nine ileally T-cannulated barrows, average body weight(BW) 30 ± 2 kg, were allotted to a row-column design comprising eight periods with 6 d each and nine pigs. On d 5 and the night of d 6 of every period, ileal digesta were collected for a total of 12 h. The IAA_(end) and the SID were determined by linear regression analysis between c AID and total dietary CP and AA.Results: There exist linear relationships between cA ID and total CP and AA(P < 0.001). The IAA_(end) of CP, Lys, Met, Thr and Trp amounted to 35.34, 1.08, 0.25, 1.02 and 0.38 g/kg DM intake(DMI), respectively, which are greater compared to average IAA_(end) determined previously under N-free feeding conditions. The SID of CP, Lys, Met, Thr and Trp was 90,79, 85, 79 and 86 %, respectively, and was greater when compared to tabulated values. Moreover, these SID values were greater than those reported in literature, based on correction of apparent ileal digestibility(AID) of CP and AA for their IAA_(end)values. Summarized, the results of the present regression analysis indicate greater IAA_(end)in barley-based diets compared to those obtained by N-free feeding.Conclusions: For low-protein feed ingredients like barley the regression method may be preferred over correction of AID values for their IAA_(end)determined under N-free feeding conditions, as intercepts and slopes of the linear regression equations between cA ID and total dietary CP and AA provide direct estimates of IAA_(end)and SID of CP and AA in the presence of the assay feed ingredient. 关 键 词：Amino acid BARLEY Basal ileal endogenous loss Growing pigs Regression analysis Standardized ileal digestibility
相关文献

参考文献(46)

引证文献(2)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费