| 凋萎和不同添加剂对紫花苜蓿青贮品质的影响 |
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| 引用本文： | 刘辉,卜登攀,吕中旺,李发弟,刘士杰,张开展,王加启.凋萎和不同添加剂对紫花苜蓿青贮品质的影响[J].草业学报,2015,24(5):126-133. |
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| 作者姓名： | 刘辉 卜登攀 吕中旺 李发弟 刘士杰 张开展 王加启 |
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| 作者单位： | 1.甘肃农业大学动物科学技术学院,甘肃 兰州730070; 2.中国农业科学院北京畜牧兽医研究所动物营养学国家重点实验室,北京100193; 3.中国饲料工业协会,北京100125; 4.北京中地种畜有限公司,北京100028 |
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| 基金项目： | “十二五”科技支撑计划，“十二五”科技支撑计划课题，中国农业科学院科技创新工程(ASTIP-IAS07)资助。 |
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| 摘 要： | 以孕蕾后期至初花期紫花苜蓿为材料,在实验室条件下研究了两种凋萎程度(晾晒3 h和晾晒12 h),对应含水率分别为72.6%和61.8%的苜蓿草分别添加乳酸菌接种剂(LAB)、甜菜粕(SB)、乳酸菌+甜菜粕(LAB+SB)、甲酸钠(SF)、甲酸钠+甜菜粕(SF+SB)五组不同添加剂处理及对照组(CK)对苜蓿青贮发酵品质和主要营养成分含量的影响。青贮65 d开封,对青贮进行了感官评定和实验室评定。结果表明,1)添加剂对苜蓿青贮发酵品质有极显著的影响(P<0.01),各种添加剂均不同程度地提高了苜蓿青贮饲料的发酵品质,显著降低了青贮饲料的pH和氨态氮含量;2)两种凋萎程度下苜蓿青贮的NDF、ADF和干物质回收率均与对照组差异不显著,LAB+SB和SF处理显著提高了青贮饲料WSC的含量(P<0.05),添加SB显著降低了青贮饲料的CP值(P<0.05);3)提高原料的凋萎程度能够改善苜蓿青贮饲料的发酵品质,显著提高青贮饲料的CP和WSC含量(P<0.05)。总体来说,不同添加剂的青贮效果不同,添加LAB+SB的青贮品质最佳。
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| 关 键 词： | 凋萎 添加剂 紫花苜蓿 青贮品质 |
| 收稿时间： | 2014-11-18; |
Effects of wilting and additives on fermentation quality of alfalfa (Medicago sativa) silage |
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| LIU Hui,BU Deng-Pan,LV Zhong-Wang,LI Fa-Di,LIU Shi-Jie,ZHANG Kai-Zhan,WANG Jia-Qi.Effects of wilting and additives on fermentation quality of alfalfa (Medicago sativa) silage[J].Acta Prataculturae Sinica,2015,24(5):126-133. |
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| Authors: | LIU Hui BU Deng-Pan LV Zhong-Wang LI Fa-Di LIU Shi-Jie ZHANG Kai-Zhan WANG Jia-Qi |
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| Institution: | 1.College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China; 2. State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; 3. China Feed Industry Association, Beijing 100125, China; 4.Beijing Sino Farm, Beijing 100028, China |
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| Abstract: | The effect of wilting and different additives on alfalfa silage fermentation and nutritive value were studied under laboratory conditions. Alfalfa (at the early bloom stage of maturity), wilting 3 and 12 h respectively, was ensiled at 72.6% and 61.8% moisture content either untreated (CK) or treated with inoculant (LAB), sugar beet pulp (SB), inoculant and sugar beet pulp (LAB+SB), sodium formate (SF) and the combination of sodium formate and sugar beet pulp (SF+SB). Silo was opened and analysed after 65 d of ensiling. The results showed that additives addition generally had an significantly effect on alfalfa silage characteristics in terms of lower pH and ammonia-N concentration (P<0.01). Treated silage had a similar concentration of neutral detergent fiber (NDF), acid detergent fiber (ADF) and dry matter recovery compared with untreated silage. The addition of sugar beet pulp (SB) greatly reduced crude protein concentrations (P<0.05). Water-soluble carbohydrate concentrations were found increased in silage from alfalfa herbage treated with inoculant and sugar beet pulp combined and sodium formate prior to ensiling (P<0.05). As silage wilting enhanced, silage quality was improved. In general, different additives had different effect on ensiling. Inoculant and sugar beet pulp combined (LAB+SB) was found to be the most effective additive. |
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| Keywords: | wilting additive alfalfa silage quality |
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