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Effect of monensin on the performance and nitrogen utilization of lactating dairy cows consuming fresh forage

机译:monensin对泌乳奶牛消耗新鲜饲料乳酸奶牛性能和氮素利用的影响

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In recent years, it has become apparent that animal agriculture can have an adverse effect on the environment, and animal nutritionists have sought mechanisms of enhancing digestion and minimizing nutrient loss. Dairy cattle have a low efficiency ofnitrogen (N) utilization. The 15N experiments of Nolan and his colleagues indicated that grazing ruminants can lose as much as 50 percent of their protein intake as excess ruminal ammonia, and this N is eventually excreted as urinary urea. The Cornell Net Carbohydrate and Protein System (CNCPS) version 4.0 has been released for use in developing herd nutrient management plans to minimize excess nutrients on the farm. However, little research has been conducted to evaluate the CNCPS predictions of performance in dairy cattle consuming fresh forages.
机译:近年来,近年来显而易见的是,动物农业可以对环境产生不利影响,动物营养学家寻求增强消化和最小化营养损失的机制。乳制品牛的氢气(n)利用率低。诺兰和他的同事的15N实验表明,放牧反刍动物可以损失多达50%的蛋白质摄入量作为多余的瘤胃氨,并且该n最终排出尿尿素。康奈尔净碳水化合物和蛋白质系统(CNCPS)版本4.0已被释放用于开发畜群营养管理计划,以尽量减少农场的过量营养。然而,已经进行了很少的研究,以评估消耗新鲜饲料的乳制品牛的CNCPS预测。

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