适应时间和甜菜粕添加水平对猪营养物质消化率及回肠氨基酸消化率评估的影响。
Effects of adaptation time and inclusion level of sugar beet pulp on nutrient digestibility and evaluation of ileal amino acid digestibility in pigs.
作者信息
Zhang Ze Yu, Zhang Shuai, Lai Chang Hua, Zhao Jin Biao, Zang Jian Jun, Huang Cheng Fei
机构信息
State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
出版信息
Asian-Australas J Anim Sci. 2018 Aug 27;32(9):1414-1422. doi: 10.5713/ajas.18.0181. Print 2019 Sep.
OBJECTIVE
Two experiments were conducted to determine the effects of adaptation time and inclusion level of sugar beet pulp (SBP) on nutrient digestibility and to evaluate the ileal AA digestibility of SBP fed to pigs.
METHODS
In Exp. 1, thirty-six crossbred barrows (85.0 ± 2.1 kg) were allotted to 6 diets in a completely randomized design with six replicates per diet. Diets included a corn-soybean meal diet and 5 test diets containing 14.6, 24.4, 34.2, 43.9, or 53.7% SBP, respectively. The adaptation time consisted 7, 14, 21, or 28 d consecutively for each pig followed by 5 d for fecal collection. Feces were collected from d 8 to 13, d 15 to 20, d 22 to 27, and d 29 to 34, respectively. In Exp. 2, six pigs (35.1 ± 1.7 kg) with T-cannulas at the terminal ileum were fed to 3 diets in a replicated 3×3 Latin square design with 3 periods and 2 replicate pigs per diet. Each period consisted 5 d for diet adaptation followed by 2 d for digesta collection.
RESULTS
The DE value and the apparent total tract digestibility (ATTD) of GE, DM, ash, and OM in diets linearly decreased (p<0.05) as the adaptation time increased or as the dietary SBP increased, while the ATTD of NDF and ADF in diets linearly increased (p<0.01) as the dietary SBP increased. The DE value and the ATTD of GE and CP in SBP linearly increased (p<0.05) as the adaptation time increased, while the ATTD of CP in SBP linearly decreased (p<0.01) as the inclusion level increased. The SID of Lys, Met, Thr, and Trp in SBP was 37.03, 51.62, 40.68, and 46.22%, respectively.
CONCLUSION
The results of this study indicated that the ATTD of energy and nutrients were decreased as inclusion rate of SBP increased.
目的
进行两项试验以确定适应时间和甜菜粕（SBP）添加水平对养分消化率的影响，并评估饲喂猪的SBP的回肠氨基酸消化率。
方法
在试验1中，36头杂交公猪（85.0±2.1千克）采用完全随机设计分配到6种日粮中，每种日粮6个重复。日粮包括玉米-豆粕型日粮和5种试验日粮，分别含有14.6%、24.4%、34.2%、43.9%或53.7%的SBP。每头猪连续适应7、14、21或28天，随后进行5天的粪便收集。粪便分别在第8至13天、第15至20天、第22至27天和第29至34天收集。在试验2中，6头在回肠末端安装T型套管的猪（35.1±1.7千克）采用重复的3×3拉丁方设计饲喂3种日粮，3个周期，每种日粮2头重复猪。每个周期包括5天的日粮适应期，随后是2天的消化物收集期。
结果
随着适应时间的增加或日粮中SBP的增加，日粮中总能（GE）、干物质（DM）、灰分和有机物（OM）的消化能（DE）值和表观全肠道消化率（ATTD）呈线性下降（p<0.05），而随着日粮中SBP的增加，日粮中中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的ATTD呈线性增加（p<0.01）。随着适应时间的增加，SBP中GE和粗蛋白（CP）的DE值和ATTD呈线性增加（p<0.05），而随着添加水平的增加，SBP中CP的ATTD呈线性下降（p<0.01）。SBP中赖氨酸（Lys）、蛋氨酸（Met）、苏氨酸（Thr）和色氨酸（Trp）的标准回肠可消化率分别为37.03%、51.62%、40.68%和46.22%。
结论
本研究结果表明，随着SBP添加率的增加，能量和养分的ATTD降低。
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