Acta Agrestia Sinica

›› 2011, Vol. 19 ›› Issue (1): 127-131.DOI: 10.11733/j.issn.1007-0435.2011.01.022

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Effects of Lactic Acid Bacteria Inoculant on the Fermentation Quality of Reed Grass(Phragmites australis Cav.Trin.ex Sterd.) at Low Temperature

WANG Peng1,4, BAI Chun-sheng2, LIU Lin3, CAO Bing-hai4   

  1. 1. College of Animal Science and Veterinary Medicine, Jilin University, Changchun, Jilin Province 130062, China;
    2. College of Horticulture, Shenyang Agricultural University, Shenyang, Liaoning Province 116101, China;
    3. Beijing Dairy Cattle Center, Beijing 100192, China;
    4. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2010-11-10 Revised:2010-12-16 Online:2011-02-15 Published:2011-02-15

低温条件下混合乳酸菌制剂对芦苇发酵品质的影响

王鹏1,4, 白春生2, 刘林3, 曹兵海4   

  1. 1. 吉林大学畜牧兽医学院, 长春, 吉林, 130062;
    2. 沈阳农业大学园艺学院, 沈阳, 辽宁, 116101;
    3. 北京奶牛中心, 北京, 100192;
    4. 中国农业大学动物科技学院, 北京, 100193
  • 通讯作者: 曹兵海,E-mail:caobinghai@163.com
  • 作者简介:王鹏(1982- ),男,吉林长春市人,博士,讲师,研究方向动物营养与粗饲料加工,E-mail:pengwang@jlu.edu.cn
  • 基金资助:
    国家现代农业产业技术体系建设专项资金(nycytx-38)资助

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Abstract: Effects of lactic acid bacteria inoculant(LABs) on the fermentation quality of the reed grass silage(Phragmites australis Cav.Trin.ex Sterd.) at a lower temperature level was studied.The reed grass which had 40% water was ensiled with LABs.The silages were stored at 4℃ and 0℃,and then sampled at 3,4,5,6,7 and 8 weeks for analyzing respectively.Results showed that the pH of the silages stored at 0℃ were decreased significantly(P<0.05) at 5th week.The contents of NDF(neutral detergent fiber)were decreased significantly(P<0.05) at 8th week.The pH of the silages stored at 4℃ dropped to be below 4.20 from 5th week.At the same ensiling time,the pH and the acetic acid content of the silages stored at 4℃ were significantly lower(P<0.05),and the content of lactic acid were significantly higher(P<0.05) than those stored at 0℃.At low temperature level,the reed grass silage of which moisture is 40% could start fermentation process if the 6.63(lg CFU·g-1 DM) LABs were added to every gram of DM.For getting good silage,the ensiling time should be at least 6 weeks.

Key words: Temperature, Lactic acid bacteria inoculant, Fermentation time, Fermentation quality

摘要： 为探讨低温条件下混合乳酸菌制剂对芦苇(Phragmites australis Cav.Trin.ex Sterd.)发酵品质的影响,对含水量为40%的芦苇添加混合乳酸菌制,分别设计4℃和0℃的发酵温度,密封发酵,分别取3,4,5,6,7和8周的发酵样品分析。结果表明:在0℃条件下,发酵后第5周pH值出现显著下降(P<0.05),第8周NDF含量显著降低(P<0.05)。在4℃条件下,发酵第3周起pH值一直保持在4.20以下。在相同发酵时间内,4℃条件比0℃条件时的pH值显著降低(P<0.05),乳酸菌数量、乳酸产量显著提高(P<0.05),乙酸产量显著降低(P<0.05)。在低温条件下,对每克干物质添加6.63(lg CFU·g-1DM)的混合乳酸菌,可使含水量为40%的芦苇启动发酵。为保证得到优良发酵质量,发酵时间应在6周以上。

关键词: 温度, 乳酸菌制剂, 发酵时间, 青贮品质

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