甜高粱凋萎青贮料在肉兔全混日粮中适宜添加量的研究

发布时间：2018-05-05 13:34

本文选题：甜高粱 + 凋萎青贮　；参考：《草业学报》2017年12期

【摘要】：采用蜡熟期甜高粱进行不同时间的凋萎处理,并进行青贮,分析了甜高粱饲用品质和青贮发酵品质的变化,明确甜高粱在凋萎过程中的养分动态以及适宜青贮加工的时间。结果表明凋萎5 h,甜高粱含水量(59.70%)和WSC含量(8.60%)是青贮品质最优。选择凋萎5 h的甜高粱青贮料进行不同添加量(添加量为25%,30%,35%)的肉兔饲喂试验,将不同添加量的青贮料配制成肉兔的全价混合日粮(total mixed ration,TMR)颗粒料进行饲喂。测定肉兔的每周增重,试验结束后进行生化指标分析。结果表明青贮甜高粱在TMR中的添加量从25%增加到35%,饲养5周后肉兔的总增重从871.56 g增加到950.25 g,而TMR颗粒料中青贮甜高粱添加30%~35%时,肉兔血液中谷丙转氨酶、谷草转氨酶、碱性磷酸酶、乳酸脱氢酶4种酶的活性均低于对照组,表明在全混日粮中添加30%~35%的凋萎青贮甜高粱有利于肉兔生长。
[Abstract]:Sweet sorghum in waxy stage was treated with wilting at different time and silage. The changes of forage quality and silage fermentation quality of sweet sorghum were analyzed. The nutrient dynamics of sweet sorghum in the process of wilting and the suitable time for silage processing were determined. The results showed that the water content of sweet sorghum was 59.70% and the content of WSC was 8.60% after withering for 5 h) and the silage quality was the best. The sweet sorghum silage with withering for 5 hours was selected to be fed with different amount of sweet sorghum silage (25%). The total mixed ration (TMRs) was used to feed the whole mixed ration of rabbits with different amount of silage. The weekly weight gain of meat rabbits was measured and the biochemical indexes were analyzed after the experiment. The results showed that the amount of silage sorghum added in TMR increased from 25% to 35%, and the total weight gain of meat rabbits increased from 871.56 g to 950.25 g after 5 weeks of feeding. However, when silage sorghum was added 30 ~ 35% in TMR pellets, the blood levels of alanine aminotransferase and aspartate aminotransferase were increased. The activities of alkaline phosphatase and lactate dehydrogenase were all lower than those of the control group, which indicated that the addition of 30% wilting sorghum to the whole mixed diet was beneficial to the growth of the rabbits.
【作者单位】：江苏省农业科学院畜牧研究所;
【基金】：公益性行业科研专项(201303061) 国家牧草产业技术体系项目(CARS-35-31)资助
【分类号】：S829.1

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