饲料营养 Feed Science and Technology

凋萎和添加剂对王草青贮品质和营养价值的影响

  • 李茂 ,
  • 字学娟 ,
  • 张英 ,
  • 周汉林 ,
  • 白昌军 ,
  • 刘国道
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  • 1. 中国热带农业科学院热带作物品种资源研究所, 儋州 571737;
    2. 海南大学应用科技学院, 儋州 571737;
    3. 海南大学农学院, 海口 570228

收稿日期: 2014-06-03

  网络出版日期: 2014-12-05

基金资助

中国热带农业科学院基本科研业务费项目(1630032014001);中国热带农业科学院科技攻关专题计划(YZT-007)

Effects of Wilted and Additive on Silage Quality and Nutritional Value of King Grass

  • LI Mao ,
  • ZI Xuejuan ,
  • ZHANG Ying ,
  • ZHOU Hanlin ,
  • BAI Changjun ,
  • LIU Guodao
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  • 1. Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China;
    2. College of Applied Science and Technology, Hainan University, Danzhoun 571737, China;
    3. College of Agriculture, Hainan University, Haikou 570228, China

Received date: 2014-06-03

  Online published: 2014-12-05

摘要

本试验旨在探讨凋萎和添加剂(绿汁发酵液、纤维素酶)对王草青贮品质和营养价值的影响.试验设对照组、凋萎(W)组、凋萎+绿汁发酵液(WP)组、凋萎+纤维素酶(WC)组、凋萎+绿汁发酵液+纤维素酶(WPC)组,青贮30 d后取样分析.结果表明:1)各组pH均小于4.0,对照组pH显著低于W组(P<0.05),WPC组pH最低;WPC组乳酸含量最高,显著高于对照组(P<0.05);对照组乙酸含量显著高于其他组(P<0.05),W组乙酸含量显著低于其他组(P<0.05);各组均未检出丁酸;对照组的氨态氮/总氮显著高于其他组(P<0.05),WPC组显著低于其他组(P<0.05).2)V-Score评分表明各组青贮品质良好,对照组评分最低(83.45),W、WP和WPC组评分较高且明显高于对照组(均高于95).3)WPC组粗蛋白质含量最高,中性洗涤纤维与酸性洗涤纤维含量最低,饲料相对值(RFV)最高,显著高于对照组(P<0.05).由此可见,王草可以直接青贮但营养价值较低,凋萎后添加绿汁发酵液和纤维素酶混合处理能改善王草青贮品质并提高营养价值.

本文引用格式

李茂 , 字学娟 , 张英 , 周汉林 , 白昌军 , 刘国道 . 凋萎和添加剂对王草青贮品质和营养价值的影响[J]. 动物营养学报, 2014 , 26(12) : 3757 -3764 . DOI: 10.3969/j.issn.1006-267x.2014.12.027

Abstract

This experiment was conducted to study the effects of wilt and additive [pre-fermented juice (PFJ) and cellulose enzyme (C)] on silage quality and nutritional value of king grass. The groups were as follows: control, wilted (W), wilted+PFJ (WP), wilted+C (WP) and wilted+PFJ+C (WPC). The silos of each group were opened and analyzed after 30 days ensilage. The results showed as follows: 1) the pH of all groups were lower than 4.0, the pH in control group was significantly lower than that in W group (P<0.05), and WPC group had lowest pH. The lactic acid content in WPC group was the highest, and significantly higher than that in control group (P<0.05). The acetic acid content in control group was significantly higher than that in other groups (P<0.05), the acetic acid content in W group was significantly lower than that in other groups (P<0.05). All groups had no butyric acid detected. The ammonia-N/total nitrogen (AN/TN) in control group was significantly higher than that in other groups (P<0.05), the AN/TN in WPC group was significantly lower than that in other groups (P<0.05). 2) According to the grade of V-Score, silage quality of all groups were well, the score of control group had lowest score (83.45), and the scores of groups W, WP and WPC were higher than that in control group (more than 95). 3) The WPC group had the highest crude protein content and relative feed value (RFV), also it had the lowest neutral detergent fiber and acid detergent fiber content, all above was significantly higher than that in other groups (P<0.05). It is concluded that the silage quality of king grass silage without treatment is well but nutritional value is low, wilted king grass supplemented with PFJ+C mixed silage can improve the silage quality and nutritional value.

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