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首页> 外文期刊>Advances in Animal and Veterinary Sciences >Performance and Estimation of Enteric Methane Emission from Fattening Vietnamese Yellow Cattle Fed Different Crude Protein and Concentrate Levels in the Diet
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Performance and Estimation of Enteric Methane Emission from Fattening Vietnamese Yellow Cattle Fed Different Crude Protein and Concentrate Levels in the Diet

机译：饲喂不同粗蛋白和日粮浓缩水平的越南黄牛育肥后肠甲烷排放的表现和估算

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The objectives of this study were to estimate of methane emission from Vietnamese local fattening cattle fed different crude protein (CP) levels in the concentrate (experiment 1) and concentrate levels in the diet (experiment 2). Twenty four cattle with initial live weight (LW) of 150.3 ± 11.8 kg were used in the first experiment and 24 other cattle with initial LW of 145.1 ± 9.8 kg were used in the second experiment. Randomized complete block design was used in both experiments. In the first experiment, concentrate with four CP levels (10, 13, 16 and 19%) was fed at 1.5% of LW. In the second experiment, concentrate was fed at 1.0, 1.4, 1.8 and 2.2% of LW. In addition, in both experiments, cattle was fed with 5 kg native grasses/day (fresh basic) and rice straw was fed ad libitum. Enteric methane emission was estimated by the ruminant model. Initial inputs to the model were i) animal characteristics (age, body weight) ii) feed consumption and iii) the chemical composition of each feed ingredient. The study revealed that dry matter (DM) intake, meat productivity were effected by CP levels in the concentrate (P0.05). Similarly, DM intake, meat productivity increased (P0.01) linearly with increased concentrate levels. Increasing the CP level in the concentrate or the concentrate level in the diet resulted in decreased methane emission intensity (kilogram of product). Appropriate CP levels in the concentrate or the concentrate levels in the diet can be sonsidered as a solution to improve animal productivity while decreasing methane emissions per unit product of cattle production.
机译：这项研究的目的是估算在浓缩液中（实验1）和日粮中浓缩物水平（实验2）中饲喂不同水平的粗蛋白（CP）的越南当地育肥牛的甲烷排放量。在第一个实验中使用了24头初始活重（LW）为150.3±11.8千克的牛，在第二个实验中使用了24头在初始体重为145.1±9.8千克的牛。在两个实验中均使用了随机完整模块设计。在第一个实验中，以1.5％的LW进料具有四个CP水平（10％，13％，16％和19％）的精矿。在第二个实验中，以LW的1.0％，1.4％，1.8％和2.2％进料浓缩物。此外，在这两个实验中，牛每天饲喂5千克本地草（新鲜碱性），稻草则随意饲喂。通过反刍动物模型估计肠内甲烷排放量。该模型的初始输入是i）动物特征（年龄，体重）ii）饲料消耗和iii）每种饲料成分的化学组成。研究表明，干物质（DM）的摄入量，肉的生产率受精矿中CP含量的影响（P <0.05）。同样，DM摄入量，肉类生产率随精矿含量的增加呈线性增加（P <0.01）。浓缩物中CP含量或日粮中浓缩物含量的增加会导致甲烷排放强度（产品千克）降低。可以考虑将精矿中适当的CP水平或日粮中的精矿中CP水平作为一种解决方案，以提高动物的生产能力，同时降低每头牛产品的甲烷排放量。

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