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首页> 美国卫生研究院文献>Journal of Animal Science >82 Effect of by-product feed supplementation of a hay-based diet on rumen fermentation diet digestibility methane production and protozoal population in an artificial rumen (RUSITEC)
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82 Effect of by-product feed supplementation of a hay-based diet on rumen fermentation diet digestibility methane production and protozoal population in an artificial rumen (RUSITEC)

机译：82副产物饲料补充在人工瘤胃（Rusitec）中瘤胃发酵饮食消化率甲烷产量和原生动物种群的瘤胃发酵饮食消化率甲烷生产和原生动物群体

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This study investigated the effects of adding sunflower screenings, flax screenings and quinoa to a hay-based diet on ruminal fermentation, DM digestibility (DMD) and enteric methane (CH4) production in an artificial rumen system (RUSITEC). The experiment was a RCBD with 4 treatments assigned to 16 fermentation vessels (n = 4/treatment) in 2 RUSITEC apparatuses. The control diet was 100% hay, with treatments consisting of sunflower screenings, flax screenings and quinoa dockage at inclusion rates of 1.10, 1.38, and 1.59 g DM, respectively. The study period was 15 d, with an 8-d adaptation and 7-d sample collection period. Data were analyzed using the PROC MIXED procedure of SAS with fixed effects of treatment, day of sampling and their interaction as fixed effects. Compared to control, the addition of sunflower screenings decreased (P = 0.020) CH4produced per g of DM digested (10.43 vs. 7.88 mg/g DMD). Inclusion of sunflower screenings reduced (P < 0.01) DMD (67.6 vs. 57.8 %) and the number of protozoa (2.2x104vs. 1x103ml) compared to the control. The addition of flax screenings versus the control diet increased (P = 0.001) CH4produced per g of DMD (10.43 vs. 15.05 mg/g). However, inclusion of flax screenings resulted in a decrease (P < 0.05) in DMD and number of protozoa compared to the control (1.07x103vs. 2.2x104ml, 64.33 vs. 67.64 %, respectively). The addition of flax screenings decreased DMD (P = 0.04). Quinoa inclusion had no effect on DMD or protozoa count, while CH4production increased (P = 0.0003) compared to the control (15.15 vs 10.43 mg/g DMD). Disappearance of NDF did not differ between treatments (P = 0.72). Inclusion of sunflower screenings and quinoa did not affect molar proportions of propionate or and butyrate, while decreased (P < 0.05) by adding flax screenings. In conclusion, the addition of sunflower screenings provided the greatest potential to reduce CH4 emissions associated with supplemented hay-based diets.
机译：本研究探讨添加向日葵掩护，亚麻放映和藜到基于干草饮食对瘤胃发酵，DM消化率（DMD）和肠溶甲烷（CH 4）的生产在人工瘤胃系统（RUSITEC）的影响。实验以分配给2个RUSITEC装置16个的发酵容器（N = 4 /处理）4个处理一个RCBD。对照饮食为100％干草，分别选自向日葵掩护，亚麻放映和在1.10，1.38添加比例藜码头费，和1.59 g干物质的，治疗。研究期间为15 d，用8 d适应和7-d样品收集期间。使用SAS的PROC MIXED程序配合治疗，一天采样和它们作为固定效应相互作用的固定效应分析数据。与对照相比，添加向日葵放映的消化降低每g干物质的（P = 0.020）CH4produced（10.43与7.88毫克/克DMD）。向日葵放映的夹杂物减少（P <0.01）DMD（67.6对57.8％）和原生动物的相比于对照（2.2x104vs。1x103ml）的数目。添加亚麻放映相对于对照饮食的增加每克DMD的（P = 0.001）CH4produced（10.43对15.05毫克/克）。但是，夹杂物亚麻放映导致原虫在DMD的降低（P <0.05）和数量与对照相比（1.07x103vs。2.2x104ml，64.33对67.64分别％）。添加亚麻放映的DMD（P = 0.04）降低。藜列入对DMD或原生动物计数没有影响，而CH4production相比于对照（15.15 VS 10.43毫克/克DMD）增加（P = 0.0003）。 NDF的消失没有治疗（P = 0.72）之间是不同的。向日葵放映和藜的夹杂物没有影响或丙酸和丁酸的摩尔比例，而降低（P <0.05）通过添加亚麻筛检。总之，除了向日葵放映的提供，以减少与补充基于干草的饮食相关的甲烷排放的最大潜力。

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