Effects of whole-plant corn silage on performance, digestibility and blood biochemical parameters in Simmental crossbred bulls

doi:10.11686/cyxb2017417

Abstract

Abstract: In this experiment, 45 healthy Simmental hybrid bulls weighing approximately 350 kg were randomly divided into three treatment groups that were fed different diets for a period of 140 d: GroupⅠ(concentrate +corn straw storage), Group Ⅱ (concentrate+whole-plant corn silage) and Group Ⅲ (concentrate+whole-plant corn silage+lactic acid bacteria compound preparation). The results showed that Group Ⅲ’s average daily gain was significantly higher than both Groups Ⅰ and Ⅱ (P<0.01). The daily gain of Group Ⅲ was 90.35% and 24.00% higher than Groups Ⅰ and Ⅱ respectively. The dry matter intake of Group Ⅰ was significantly higher than Groups Ⅱ and Ⅲ (P<0.01), while there were no significant differences between Groups Ⅱ and Ⅲ. The feed:gain ratio of Groups Ⅱ and Ⅲ were significantly lower than Group Ⅰ (P<0.01). The digestibility of crude protein (Measurement using the FOSS Automated Protein Analyzer (USA)[1])for Groups Ⅱ and Ⅲ was higher than Group Ⅰ (P<0.05), and especially so in the case of Group Ⅲ (P<0.01). The apparent digestibility of neutral detergent fiber and acid detergent fiber in Group Ⅲ were significantly higher than Group Ⅰ (P<0.05). The content of free fatty acids and leptin in Group Ⅰ were significantly higher than Groups Ⅱ and Ⅲ (P<0.05).The levels of bovine insulin-like growth factor in Groups Ⅱ and Ⅲ were significantly higher than Group Ⅰ(P<0.05) and there was also a significant difference between Groups Ⅱ and Ⅲ (P<0.05). The average daily benefit of Group Ⅲ was 22.21 yuan and 9.27 yuan higher than that of Groups Ⅰ and Ⅱ respectively. In conclusion, this experiment showed that, in terms of fattening effects and economic benefits, cattle diets with additive whole corn silage outperformed the other two treatments studied.

Key words: beef cattle, corn stalk yellow storage, whole plant silage corn, blood biochemical index, apparent digestibility, growth performance, economic benefit

SUN Xue-li, LI Qiu-feng, LIU Ying-cai, CAO Yu-feng, WANG Zeng-lin, LI Yi, ZHAO Yang-yang, GE Han-cong, LIU Tao-tao, ZHAO Li-xin. Effects of whole-plant corn silage on performance, digestibility and blood biochemical parameters in Simmental crossbred bulls[J]. Acta Prataculturae Sinica, 2018, 27(9): 201-209.

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