Abstract:

In the paper, effect of expanded mixed feed on milking performance, DMI and appearance digestibility of nutrition in dairy cow was studied. 80 China Holstein dairy cow of last lactation period were randomly allotted into 2 groups. This trial lasted for 56 days. The concentrate for control group was normal feed. Parts of energy feed and protein feed of concentrate for treatment group was expanded mixed feed. The results showed that expanded mixed feed could increase milk yield (P < 0.05). Total milk yield and FCM yield per cow of the treatment group were 1117.40 kg and 1128.30 kg respectively, which were 56.43kg and 50.29kg more than the control group. Expanded mixed feed effected milk fat percentage and total solids yield significantly (P < 0.05). Yield of fat and solids in treatment group were 1.85 kg and 1.17 kg more than that of control group. Milk protein was not effected by the dietary treatment. To dairy cow of last lactation period, Expanded-mixed feed can improve the dry matter take(DMI) and appearance digestibility of crud protein significantly (P＜0.05). DMI in treatment group was 1.57kg/d more than the control group, though the results of appearance digestibility of organic matter were not significant in statistics. Expanded mixed feed could increase DMI and improve the milking performance and the appearance digestibility of nutrition.