将18头荷斯坦产奶牛随机分为试验6组,每组3头,试验Ⅰ～Ⅵ组奶牛依次饲喂不同精粗料比(精料:粗料)的TMR1 (20∶80)、TMR2(30∶70)、TMR3 (40∶60)、TMR4 (50∶50)、TMR5 (60∶40)、TMR6 (70∶30)的日粮,探讨不同精粗料比TMR对奶牛粪尿、N、P的排泄量和CH4释放量的影响.结果,饲喂TMR4与饲喂TMR1和TMR6的奶牛相比,每头奶牛每年CH4释放量减少15.20 Kg和89.84 Kg;粪便排泄量减少1.37t和1.41 t；N降低3.71kg和17.50 kg；P减少2.59 kg和4.07 kg,比TMR1 FCM提高10.54% (P＜0.05)；乳脂率增加9.67%(P＜0.05)；乳糖增加7.26%(P＜0.05),能减少奶牛对土壤水源及空气的污染,提高奶牛的生态效益和经济效益.%Eighteen Holsteins were divided randomly into six groups which were fed different concentrate/ roughage ratio TMRK(20:80),TMR2(30:70)、KTMR3(40:60KTMR4(50:5O),TMR5(6O:40),TMR6(70: 30) respectively ( Ⅰ～Ⅳ treatments). The objective was to study effects of different concentrate/roughage ratio on feces and urine, nitrogen and phosphorus, methane production in dairy cows. The results were as follows: compared with the Holsteins of theland VI treatments, the methane production of the animals of group Ⅳ reduced 15. 20 kg and 89. 84 kg; Feces and urine reduced 1. 37t andl. 41t; Nitrogen decreased 3. 71 kg and 17. 50 kg; Phosphorus reduced 2. 59 kg and 4. 07 kg;and the FCM enhanced 10. 54% significantly higher than that of groupI(P< 0.05); Fat percentage increased 9. 67%(P<0. 05);Concentration of milk sugar increased 7. 26%(P<0. 05), which can reduce the pollution of dairy cows to soil, water and air and enhance the Holsteins economic and ecological benefit effectively.
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