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草业学报 ›› 2019, Vol. 28 ›› Issue (6): 109-118.DOI: 10.11686/cyxb2018339

• 研究论文 • 上一篇    下一篇

植物乳杆菌和含水量对辣木叶青贮品质和单宁含量的影响

王成1, 王益2, 周玮2, 骈瑞琪2, 张庆2,*, 陈晓阳2,*   

  1. 1.华南农业大学动物科学学院,广东 广州 510642;
    2.华南农业大学林学与风景园林学院,广东木本饲料工程技术研究中心,广东省森林植物种质创新与利用重点实验室,广东 广州 510642
  • 收稿日期:2018-05-22 修回日期:2018-07-05 出版日期:2019-06-20 发布日期:2019-06-20
  • 通讯作者: *E-mail: zqing1988@126.com, xychen@scau.edu.cn
  • 作者简介:王成(1994-),男,安徽芜湖人,在读硕士。E-mail: 2556567744@qq.com
  • 基金资助:
    国家自然科学基金(31702177), 广州市科技计划项目(201707010462)和广东省农业标准化研究项目(辣木叶青贮技术的研究)资助

Effects of Lactobacillus plantarum (LP) and moisture on feed quality and tannin content of Moringa oleifera leaf silage

WANG Cheng1, WANG Yi2, ZHOU Wei2, PIAN Rui-qi2, ZHANG Qing2,*, CHEN Xiao-yang2,*   

  1. 1.College of Animal Science, South China Agricultural University, Guangzhou 510642, China;
    2.College of Forestry and Landscape Architecture, South China Agricultural University, Guangdong Research Center of Woody Forage Engineering Technology Guangzhou, Guangdong Key Laboratory for Innovation Development and Utilization of Forest Plant Germplasm, Guangzhou 510642, China
  • Received:2018-05-22 Revised:2018-07-05 Online:2019-06-20 Published:2019-06-20
  • Contact: * E-mail: zqing1988@126.com, xychen@scau.edu.cn

摘要: 试验旨在探讨含水量和添加植物乳杆菌对辣木叶青贮品质、单宁含量的影响。采用双因素(水分×植物乳杆菌)完全随机设计,含水量分别为60%、70%和75%,植物乳杆菌设置添加组(1×106 cfu·g-1鲜样)和对照组。分别于青贮的60和120 d,开袋取样测定发酵品质、蛋白组分和单宁含量。辣木叶干物质中粗蛋白(CP)含量为16.72% ,可溶性碳水化合物(WSC)含量为10.72%。含水量对辣木叶青贮品质有显著影响,70%含水量组与60%水量组相比,氨态氮(NH3-N)、氨基酸类游离氮(FAA)、乙酸(AA)、丙酸(PA)和乳酸(LP)含量均显著降低(P<0.05);在70%含水量条件下,添加植物乳杆菌,有机酸(LA、AA、PA)含量显著升高(P<0.05),乳酸菌(LAB)和酵母菌(Yeast)数目显著降低(P<0.05);发酵60 d时,在60%和75%含水量条件下,添加植物乳杆菌,pH值显著降低 (P<0.05);所有处理的大肠杆菌数量均小于2.0 log cfu·g-1FM。不同含水量和植物乳杆菌对辣木叶青贮后单宁含量均有降低作用,但无显著差异(P>0.05)。辣木叶蛋白丰富,易于调制青贮饲料,70%含水量和添加植物乳杆菌对辣木叶青贮品质有明显的改善作用,对降解单宁含量并未产生显著影响。

关键词: 辣木叶青贮, 含水量, 乳酸菌, 单宁

Abstract: This study aimed to investigate the effect of moisture and Lactobacillus plantarum (LP) on the quality and tannin content of Moringa oleifera leaf silage. The design was a completely randomized, two-factor (60%, 70%, or 75% moisture×+/- LP, 1×106 cfu·g-1 fresh matter. After 60 and 120 days ensiling, samples were collected to determine fermentation quality, protein composition and tannin content. The M. oleifera leaves at ensiling had a crude protein (CP) content of 16.72% of dry matter (DM), and water soluble carbohydrate (WSC) content of 10.72% DM. The moisture content had a significant effect on the quality of M. oleifera leaf silage. Compared with the 60% water group, the content of ammoniacal nitrogen (NH3-N) and free amino acid (FAA) in the 70% water content group was significantly decreased (P<0.05), and the contents of lactic acid (LA), acetic acid (AA) and propionic acid (PA) were significantly increased (P<0.05). At 70% water content, adding L. plantarum resulted in significantly increased (P<0.05) the content of organic acids (LA, AA, PA), while the numbers of lactic acid bacteria and yeasts were significantly decreased (P<0.05). After 60 d at 75% moisture content, the addition of L. plantarum had reduced the pH value significantly (P<0.05), and all treated coliform counts were less than 2.0 log cfu·g-1 fresh matter. None of the various combinations of LP and moisture treatment produced any statistically significant change to the tannin content of M. oleifera leaf silage (P>0.05). The protein content of M. oleifera leaves is high, and they are easy to ensile. The 70% water content and the addition of LP obviously improve the quality of M. oleifera leaf silage, but do not have any significant effect on degradation of the tannin content.

Key words: Moringa oleifera leaves silage, moisture, lactic acid bacteria, tannin