当前位置: X-MOL 学术J. Anim. Physiol. Anim. Nutr. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Partially replacing sorghum silage with cactus (Opuntia stricta) cladodes in a soybean oil‐supplemented diet markedly increases trans‐11 18:1, cis‐9, trans‐11 CLA and 18:2 n‐6 contents in cow milk
Journal of Animal Physiology and Animal Nutrition ( IF 2.7 ) Pub Date : 2020-10-27 , DOI: 10.1111/jpn.13466
Marco A S Gama 1 , Talita A de Paula 2 , Antônia S C Véras 3 , Sebastião I Guido 4 , Cristiano A V Borges 1 , Rosemar Antoniassi 5 , Fernando C F Lopes 1 , Maria L M W Neves 3 , Marcelo de A Ferreira 3
Affiliation  

Based on low 18:0 contents observed in milk fat of cows fed cactus cladodes (CC), we hypothesized that including Opuntia stricta cladodes in a soybean oil (SO)‐supplemented diet would promote incomplete rumen biohydrogenation of supplemental PUFA, leading to increased trans‐11 18:1 and cis‐9, trans‐11 CLA contents in milk. Twelve Holstein cows were used in a two‐period study: (a) Baseline: all cows received a total mixed ration (TMR) composed of sorghum silage (SS) and a concentrate containing no SO for 14 days; (b) Treatment: cows received one of the following SO‐supplemented diets for 21 days: (1) SS‐TMR: a TMR composed of SS and a SO‐enriched concentrate, (2) CC‐TMR: a TMR containing CC as a partial substitute for SS plus the SO‐enriched concentrate, and (3) CC‐PMR: same diet as in treatment 2, but CC were mixed with the SO‐enriched concentrate and fed as a partial mixed ration (PMR). Both CC diets increased relative abundances of trans‐11 18:1, cis‐9, trans‐11 CLA, and 18:2 n‐6 in milk fat, whereas opposite effects were observed on 18:0 and cis‐9 18:1. Proportion of 18:2 n‐6 increased, and cis‐9, trans‐11 CLA tended to increase with CC‐PMR as compared to CC‐TMR, whereas 18:3 n‐3 was higher with CC‐PMR than with SS‐TMR. Proportions of several odd‐ and branched‐chain fatty acids, certain 18:1 isomers, and trans‐9, cis‐11 CLA changed with CC diets, notably with CC‐PMR. Milk yield and intake of most nutrients (except fibre) increased or tended to increase with the CC diets, whereas gross milk composition was unaltered. Stearoyl‐CoA desaturase‐1 index for C18 (SCD18) was higher with CC‐PMR than with SS‐TMR, and milk n‐6:n‐3 FA ratio and apparent transfer of 18:2 n‐6 to milk increased with CC diets. These results indicate that Opuntia stricta cladodes can be a valuable feed ingredient for improving the nutraceutical value of milk fat.

中文翻译:

在补充大豆油的饮食中用仙人掌(Opuntia stricta)枝条部分替代高粱青贮显着增加牛奶中反式 11 18:1、顺式 9、反式 11 CLA 和 18:2 n-6 的含量

基于低18:0含量在饲喂仙人掌叶状枝(CC)的乳脂观察,我们推测,包括缩刺仙人掌在大豆油叶状枝(SO)-supplemented饮食会促进不完全瘤胃补充PUFA的生物氢化,导致增加的反式‐11 18:1和顺式‐9,反式‐11 牛奶中的 CLA 含量。在一项两期研究中使用了 12 头荷斯坦奶牛:(a) 基线:所有奶牛接受由高粱青贮饲料 (SS) 和不含 SO 的浓缩物组成的全混合日粮 (TMR),持续 14 天;(b) 处理:奶牛接受以下添加 SO 的饮食之一,持续 21 天:(1) SS-TMR:由 SS 和富含 SO 的浓缩物组成的 TMR,(2) CC-TMR:含有 CC 作为的 TMR SS 的部分替代品加上富含 SO 的浓缩物,以及 (3) CC-PMR:与处理 2 相同的饮食,但 CC 与富含 SO 的浓缩物混合并作为部分混合日粮 (PMR) 饲喂。两种 CC 饮食都增加了乳脂中trans ‐11 18:1、cis ‐9、trans ‐11 CLA 和 18:2 n-6 的相对丰度,而在 18:0 和‐9 18:1。与CC-TMR相比,CC-PMR的18:2 n-6比例增加,-9、-11 CLA倾向于增加,而CC-PMR的18:3 n-3高于SS- TMR。几种奇数和支链脂肪酸、某些 18:1 异构体和反式9、顺式11 CLA 的比例随 CC 饮食而变化,尤其是 CC-PMR。牛奶产量和大多数营养素(纤维除外)的摄入量随着 CC 饮食增加或趋于增加,而总牛奶成分没有改变。CC-PMR 的C18 硬脂酰辅酶 A 去饱和酶 1 指数(SCD 18)高于 SS-TMR,牛奶 n-6:n-3 FA 比率和 18:2 n-6 向牛奶的表观转移增加CC饮食。这些结果表明Opuntia stricta cladodes 是一种有价值的饲料成分,可提高乳脂的营养价值。
更新日期:2020-10-27
down
wechat
bug