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首页> 外文期刊>Journal of Animal Science >Effects of feeding corn modified wet distillers grain plus solubles co-ensiled with chopped whole plant corn on heifer growth performance and diet digestibility in beef cattle.
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Effects of feeding corn modified wet distillers grain plus solubles co-ensiled with chopped whole plant corn on heifer growth performance and diet digestibility in beef cattle.

机译：饲喂改良的湿法蒸馏酒谷物加可溶物与切碎的全植物玉米混合，对肉牛小母牛生长性能和日粮消化率的影响。

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Two experiments were conducted to evaluate the effect of feeding corn modified wet distillers grain plus solubles (MWDGS; 48% DM) co-ensiled with chopped whole plant corn (WC) on growth performance, dietary intake, and nutrient digestibility of beef cattle. In Exp. 1, 96 Angus-crossed heifers (2 yr old; 522+or-49.1 kg BW; 5.3+or-0.1 BCS) were stratified and blocked according to BW and stratified by BCS in each block in a randomized complete block design (24 pens; 4 heifers/pen; 6 treatment replications). Groups were assigned to 1 of 4 dietary treatments for a 62 d trial. Treatments were (1) corn silage (CS) and soybean meal (CON), (2) MWDGS co-ensiled with chopped whole plant corn (WC; CO-EN), (3) CS mixed with MWDGS at feeding (CS+WDG), and (4) CS mixed with dry distillers grain plus solubles (DDGS) at feeding (CS+DDG). In Exp. 2, 4 crossbred beef steers (initial BW=278+or-18 kg) fitted with permanent ruminal cannulas were used in a balanced 4x4 Latin square to test the effects of feeding MWDGS co-ensiled with WC on DM intake, ruminal fermentation characteristics, and total tract digestibility. There were four 14-d periods, with 10 d for diet adaptation and 4 d for samples collection. Orthogonal contrasts were used and compared CON vs. diets containing distillers grains (DGD), CO-EN vs. diets where distillers grains were mixed at feeding (MIX), and CS+WDG vs. CS+DDG. In Exp. 1, the CON fed heifers resulted in greater G:F (P=0.04) compared with those fed DGD. However, ADG (P=0.03), final BW (P=0.04), and BW gain (P=0.03) were greatest for DGD diets compared with CON and greatest (P=0.04) for CO-EN when compared with MIX. Apart from a slightly greater acetate concentration (P=0.05), which resulted in a greater acetate to propionate ratio (P=0.03) for the CON diet compared with DGD, no important differences were observed on intake, diet digestibility, or fermentation characteristics when comparing the CON treatment with DGD or when comparing CS+WDG with CS+DDG. However, the CO-EN diet resulted in decreased DMI (P=0.05) and consequently decreased OM (P=0.05), N (P=0.04), and NDF (P=0.02) intakes compared with MIX. Data from these studies suggest that MWDGS co-ensiled with WC can successfully replace traditional corn-based diets supplemented with soybean meal and corn silage diets supplemented with distillers grains without compromising digestibility and growth performance in pregnant heifers.
机译：进行了两个实验，以评估饲喂与切碎的全植物玉米（WC）共同包裹的玉米改良湿蒸馏酒谷物加可溶物（MWDGS; 48％DM）对肉牛的生长性能，饮食摄入和营养消化率的影响。在实验中1,96只安格斯杂交小母牛（2岁; 522+或-49.1 kg体重; 5.3+或-0.1 BCS）根据体重进行分层和封闭，并按随机分组完整块设计（24笔）在每个块中按BCS分层; 4个小母牛/笔; 6个处理重复。将一组患者分配到4种饮食疗法中的1种进行62天试验。处理方法是（1）玉米青贮饲料（CS）和豆粕（CON），（2）MWDGS与切碎的全植物玉米（WC; CO-EN）联合，（3）CS在饲喂时与MWDGS混合（CS + WDG ），以及（4）CS与干酒糟和可溶物（DDGS）在进料时混合（CS + DDG）。在实验中2，在平衡的4x4拉丁方形中使用4个装有永久性瘤胃插管的杂交牛ste牛（初始BW = 278 +或-18公斤），以测试与WC共同掺入的MWDGS对DM摄入量，瘤胃发酵特性的影响，和全道消化率。有四个14天的时段，其中10天用于饮食适应，而4天用于样本采集。使用正交对比并比较CON与含酒糟的日粮（DGD），CO-EN与酒糟在喂养时混合的日粮（MIX）以及CS + WDG与CS + DDG的日粮。在实验中如图1所示，与饲喂DGD的小母牛相比，CON饲喂的小母牛产生了更高的G：F（P = 0.04）。但是，与CON相比，DGD日粮的ADG（P = 0.03），最终体重（P = 0.04）和体重增加（P = 0.03）最大，而与MIX相比，CO-EN最大（P = 0.04）。与DGD相比，CON饮食中的乙酸盐浓度略高（P = 0.05），导致乙酸盐与丙酸盐的比例更高（P = 0.03），但在摄入量，饮食消化率或发酵特性方面未观察到重要差异。比较CON治疗与DGD或比较CS + WDG与CS + DDG。然而，与MIX相比，CO-EN饮食导致DMI降低（P = 0.05），因此导致OM（P = 0.05），N（P = 0.04）和NDF（P = 0.02）摄入减少。这些研究的数据表明，与WC联合掺入的MWDGS可以成功替代传统的玉米日粮，豆粕和玉米青贮饲料和酒糟，同时不损害孕妇小母牛的消化率和生长性能。

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