本论文第二部分主要研究了四种不同精粗比典型日粮条件下泌乳奶牛瘤胃氮素代谢、小肠蛋白质的消化吸收及其对生产性能的影响。
The second part was mainly conducted to study the effects of four typical diets on rumen nitrogen metabolism, protein digestion and absorption in the small intestine, and dairy cow's milk performance.
本试验应用体外批次培养法，研究了不同精粗比（2：8与3：7）日粮甲烷产量的差异。
Based on in vitro batch incubation, different methane production of two diets with different forage:concentrte ratios(2:8 and 3:7) was compared.
它具有一个38.5毫米不锈钢抛光精钢表壳，黑色表盘，夜光数字和标记，在3：00日期窗口，夜光填充银时针和分针，并有专人银秒。
It features a 38.5mm polished stainless steel case, a black dial with luminous Numbers and markers, a date window at 3:00, luminous filled silver hour and minute hands, and a silver seconds hand.
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