| 紧实度对青贮玉米有氧稳定期发酵品质、微生物数量的效应研究 |
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| 引用本文： | 王旭哲,贾舒安,张凡凡,鲁为华,张前兵,马春晖.紧实度对青贮玉米有氧稳定期发酵品质、微生物数量的效应研究[J].草业学报,2017,26(9):156-166. |
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| 作者姓名： | 王旭哲 贾舒安 张凡凡 鲁为华 张前兵 马春晖 |
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| 作者单位： | 1.石河子大学动物科技学院,新疆 石河子 832003; 2.新疆维吾尔自治区动物卫生监督所,新疆 乌鲁木齐 830011 |
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| 基金项目： | 国家自然科学基金项目，国家牧草产业技术体系，新疆研究生科研创新项目 |
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| 摘 要： | 本研究旨在分析不同紧实度对全株玉米青贮有氧暴露期间发酵品质和微生物变化的影响,为生产实践选择适宜的青贮紧实度提供参考。以新饲玉10号青贮玉米为材料,发酵装料密度设计为5个梯度(350,400,500,600,700 kg/m3),发酵期为50 d,检测开窖后各紧实度处理第12,24,36,60,108 h青贮发酵品质和主要微生物的变化,并用多通道温度记录仪监测温度变化。结果表明,有氧暴露时间与紧实度的交互作用对pH、乳酸、乙酸和氨态氮含量以及乳酸菌、霉菌、酵母菌和好氧细菌数量产生极显著影响(P<0.01)。开窖108 h后,紧实度为600 kg/m3青贮饲料的乳酸菌数量最多,达到8.17 lg cfu/g FW,其pH值和氨态氮含量最低,霉菌和酵母菌数量最少,分别为5.38和7.72 lg cfu/g FW;且紧实度600 kg/m3有氧暴露后稳定的时间显著高于其他处理(P<0.05),达到100 h。通过综合评价,在有氧暴露后紧实度为600 kg/m3的全株玉米青贮发酵品质及有氧稳定性最好,建议600 kg/m3为全株玉米最佳青贮紧实度。
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| 关 键 词： | 青贮玉米 有氧稳定期 发酵品质 微生物数量 紧实度 |
| 收稿时间： | 2016-11-29 |
| 修稿时间： | 2017-02-10 |
Fermentation quality and microbial quantity during aerobic storage of corn silage |
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| WANG Xu-Zhe,JIA Shu-An,ZHANG Fan-Fan,LU Wei-Hua,ZHANG Qian-Bing,MA Chun-Hui.Fermentation quality and microbial quantity during aerobic storage of corn silage[J].Acta Prataculturae Sinica,2017,26(9):156-166. |
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| Authors: | WANG Xu-Zhe JIA Shu-An ZHANG Fan-Fan LU Wei-Hua ZHANG Qian-Bing MA Chun-Hui |
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| Institution: | 1.College of Animal Sciences and Technology, Shihezi University, Shihezi 832003, China; 2.Institute of Animal Health Supervision of Xinjiang Uygur Autonomous Region, Urumqi 830011, China |
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| Abstract: | The objective of this study was to analyze the effect of density on the fermentation quality and microbial content of whole plant corn (Zea mays) silage,to provide a reference for selecting the appropriate density for silage in practice.The silage material was Xinsiyu 10,which was compacted to varying densities (350,400,500,600,and 700 kg/m3) and then fermented for 50 days.The fermentation quality,microbial content,and aerobic stability of silage samples after 12,24,36,60 and 108 h exposure to air were evaluated using an online multi-channel data logger temperature recorder.The results indicated that the pH value,lactic acid content,acetic acid content,NH3-N content,and amounts of lactic acid bacteria,molds,yeasts,and aerobic bacteria significantly decreased during ensilage (P＜0.05).Oxygen exposure time had a significant effect on the above indicators (P＜0.01) during aerobic exposure.At 108 h after opening silos,the 600 kg/m3 treatment had the highest lactic acid bacteria content (up to 8.17 lg cfu/g FW) and the lowest pH value,NH3-N content,fungi content (5.38 lg cfu/g FW) and yeasts content (7.72 lg cfu/g FW).The 600 kg/m3 treatment also showed the highest stability among the treatments (100 h in air;P＜0.05).In summary,these results indicate that 600 kg/m3 is the best density for producing corn silage with high fermentation quality and aerobic stability. |
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| Keywords: | corn silage aerobic stability fermentation characteristics microbial quantity compaction |
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