草地学报

草地学报 ›› 2013, Vol. 21 ›› Issue (5): 985-990.DOI: 10.11733/j.issn.1007-0435.2013.05.023

• 研究论文 • 上一篇    下一篇

西藏多年生黑麦草与紫花苜蓿混合青贮的研究

刘秦华, 郭刚, 宋晓欣, 闻爱友, 荣辉, 邵涛   

  1. 南京农业大学动物科学技术学院 饲草调制加工与贮藏研究所, 江苏 南京 210095
  • 收稿日期:2013-02-26 修回日期:2013-04-07 发布日期:2013-10-30
  • 通讯作者: 邵涛
  • 作者简介:刘秦华(1983- ),男,重庆人,博士,讲师,主要从事饲草调制加工与贮藏研究,E-mail: liuqinhua1983@qq.com
  • 基金资助:

    国家科技支撑计划"藏北退化草地综合整治技术与示范"(2010BAE00739-03);西藏重大科技专项"优质青贮饲料生产、加工和贮藏技术研究与示范"资助

The Research of Mixed Ensiling Perennial Ryegrass (Lolium perenne L.) and Alfalfa (Medicago sativa L.) in Tibet

LIU Qin-hua, GUO Gang, SONG Xiao-xin, WEN Ai-you, RONG Hui, SHAO Tao   

  1. Institute of Ensiling and Processing of Grass, College of Animal Sciences and Technology, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China
  • Received:2013-02-26 Revised:2013-04-07 Published:2013-10-30

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摘要： 为合理利用西藏牧草资源,研究多年生黑麦草(Lolium perenne L.)和紫花苜蓿(Medicago sativa L.)混合青贮饲料的发酵品质,以筛选出适宜的混合比例。设100%多年生黑麦草(CK),85%多年生黑麦草+15%紫花苜蓿(L组),75%多年生黑麦草+25%紫花苜蓿(M组),65%多年生黑麦草+35%紫花苜蓿(H组)4个处理组,分别于青贮7,24和45 d后开窖进行品质鉴定。结果表明:适当添加紫花苜蓿提高了粗蛋白含量(P<0.05),促进了乳酸发酵,特别是M组在整个青贮过程中的乳酸含量都高于其他组(P<0.05),且青贮终点的丁酸含量低于CK和L组(P<0.05);所有青贮饲料的丁酸含量和NH3-N/TN都较低,V-Score评分显示各组的发酵品质良好。从营养均衡和发酵品质的角度出发,建议以25%紫花苜蓿混合青贮较为适宜。

关键词: 多年生黑麦草, 紫花苜蓿, 青贮, 发酵品质

Abstract: In order to reasonably utilize forage recourse of Tibet, the fermentation qualities of mixed perennial ryegrass and alfalfa silages were researched through following treatments: CK (100% perennial ryegrass), L (85% perennial ryegrass+15% alfalfa), M (75% perennial ryegrass+25% alfalfa), H (65% perennial ryegrass+35% alfalfa). After ensiling 7, 24 and 45 days, the silage silos were opened in triplicate and examined the quality of silage. Alfalfa addition increased the crude protein content of mixed silage (P<0.05). Adding proper alfalfa promoted the lactic acid fermentation of the mixed silages. Especially, lactic acid content of M treatment was higher than other treatments during ensiling (P<0.05), and its butyric acid content was lower than CK and L treatment during ensiling process (P<0.05). All silages had low butyric acid contents and NH3-N/TN. And V-Scores indicated good fermentation quality. It was suggested that mixed 25% alfalfa was best for balancing the nutrient of perennial ryegrass and improving fermentation quality.

Key words: Perennial ryegrass, Alfalfa, Mixed ensilage, Fermentation quality