Quality determination of mixed silage of medicago sativa,pennisetum hydridum,and pennisetum purpureum and its fattening effect in beef cattle breeding
To investigate the effects of mixed silage of Medicago sativa(MS),Pennisetum hydridum(PH),and Pennisetum purpureum(PP),five treatments were set up.The proportions of MS∶PH∶PP in M100,M80,M70,M60 and M50 were 100∶10∶10,80∶10∶10,70∶15∶15,60∶20∶20 and 50∶25∶25,respectively.fermentation and nutritional analysis were conducted,and its fattening effect on beef cattle was studied.54 cows of 14 month old and 450 kg were selected.The cows were randomly divided into 6 groups with each group of 3 replicates and 3 cows per replicate.CK was fed with basic feed,while M1,M2,M3,M4,and M5 were added with 15%of M100,M80,M70,M60,and M50,respectively.The pH of M50 and M60 was the lowest,and lactate was the highest.M60 showed the highest acetic acid,while M50 had the lowest.As the proportion of MS decreased,the dry matter and neutral detergent fiber increased(P＜0.05),while the crude protein decreased(P＜0.05).ADFI of CK was significantly higher than that of M1 and M2(P＜0.05),and significantly lower than that of M4 and M5(P＜0.05).F/G of M1 and M2 was significantly higher than that of CK(P＜0.05),while that of M4 and M5 was significantly lower than CK(P＜0.05).Considering fermentation and nutritional quality,and fattening effect on beef cattle,a ratio of 60∶20∶20 for MS∶PH∶PP was more suitable.
medicago sativapennisetum hydridumpennisetum purpureumnutritional qualityfattening of beef cattle
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