Study on Qualities of Ensiled Alfalfa and Italian Ryegrass at Different Mixed Ratios

doi:10.11733/j.issn.1007-0435.2015.02.027

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (2): 394-400.DOI: 10.11733/j.issn.1007-0435.2015.02.027

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Study on Qualities of Ensiled Alfalfa and Italian Ryegrass at Different Mixed Ratios

CUI Xin, LIU Xin-bao, LI Zhi-hua

College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China

Received:2014-04-21 Revised:2014-08-26 Online:2015-04-15 Published:2015-03-25

紫花苜蓿与多花黑麦草不同质量比青贮饲料的品质分析

崔鑫, 刘信宝, 李志华

南京农业大学草业学院, 江苏南京 210095

通讯作者: 李志华
作者简介:崔鑫(1990-),女,吉林通化人,硕士研究生,研究方向为牧草高产栽培与利用,E-mail:elylqc@gmail.com
基金资助:
“十二五”农村领域国家科技计划项目(2011BAD17B03)资助

Abstract

Abstract:

Protein components and qualities of ensiled alfalfa (Medicago sativa) and Italian ryegrass(Lolium multiflorum) were studied. The harvested alfalfa and ryegrass were mixed according to the ratio of 10:0 (A₁₀B₀), 8:2 (A₈B₂), 6:4 (A₆B₄), 4:6 (A₄B₆), 2:8 (A₂B₈), 0:10 (A₀B₁₀). The result showed that the mixed silages of alfalfa and Italian ryegrass gained the lower levels of pH and NH₃-N, especially A₄B₆ and A₂B₈ treatments. The mixed ensiling A₈B₂, A₆B₄ and A₄B₆ treatments had the higher levels of CP and SOLP than the single ensiling A₁₀B₀ and A₀B₁₀ treatments. The NPN contents of all treatments maintained the high levels during tested period, while A₄B₆ and A₂B₈ treatments could better preserve ADIP than others. The A₂B₈ treatment had the best protein structure resulted from the least PA+PB1 and the most PB2+PB3. However, the content of crude protein in A₄B₆ treatment was significantly higher than in A₂B₈ treatment. It was suggested that the best ratio of mixed silage of alfalfa and Italian ryegrass was 4:6.

Key words: Alfalfa, Italian ryegrass, Mixed silage, Protein, CNCPS

摘要：

为探讨紫花苜蓿(Medicago sativa)和多花黑麦草(Lolium multiflorum)单独青贮与不同比例混合青贮品质的差异,将二者按6种不同鲜草质量比10:0 (A₁₀B₀), 8:2 (A₈B₂), 6:4 (A₆B₄), 4:6 (A₄B₆), 2:8 (A₂B₈), 0:10(A₀B₁₀)进行青贮品质比较试验.结果表明:pH和氨态氮(NH₃-N)含量混合青贮相对于紫花苜蓿单独青贮显著降低,A₄B₆, A₂B₈均显著低于其他处理(P <0.05).混合青贮处理A₈B₂, A₆B₄, A₄B₆粗蛋白(CP)及可溶性蛋白(SOLP)含量均显著高于单独青贮处理,各处理的非蛋白氮(NPN)含量处于较高的水平,A₄B₆和A₂B₈能更好地保存中性洗涤不溶蛋白(ADIP).A₂B₈的饲料蛋白质在瘤胃中容易降解部分PA+PB1含量最低,瘤胃中缓慢降解部分PB2+PB3最高,蛋白质组成最优,但A₄B₆粗蛋白总量明显高于A₂B₈(P <0.05).紫花苜蓿和多花黑麦草混合青贮质量比为4:6时效果最佳.

关键词: 紫花苜蓿, 多花黑麦草, 混合青贮, 蛋白质, 康奈尔净碳水化合物-蛋白质体系

CLC Number:

S541

CUI Xin, LIU Xin-bao, LI Zhi-hua. Study on Qualities of Ensiled Alfalfa and Italian Ryegrass at Different Mixed Ratios[J]. Acta Agrestia Sinica, 2015, 23(2): 394-400.

崔鑫, 刘信宝, 李志华. 紫花苜蓿与多花黑麦草不同质量比青贮饲料的品质分析[J]. 草地学报, 2015, 23(2): 394-400.

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Study on Qualities of Ensiled Alfalfa and Italian Ryegrass at Different Mixed Ratios

紫花苜蓿与多花黑麦草不同质量比青贮饲料的品质分析

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