含水量和乳酸菌添加剂对多花黑麦草青贮品质的影响

doi:10.11686/cyxb20140641

摘要/Abstract

摘要： 本试验旨在研究含水量和乳酸菌添加剂对多花黑麦草青贮品质的影响,探究优质多花黑麦草青贮饲料的调制方法。试验选用孕穗期的多花黑麦草为原料,原料含水量设85.23%(W₁),74.70%(W₂)和65.70%(W₃)3个水平,乳酸菌添加浓度设置对照组0 cfu/g鲜样(L₀),10⁵ cfu/g鲜样(L₁),10⁶ cfu/g鲜样(L₂),10⁷ cfu/g鲜样(L₃)4个水平。桶装青贮42 d后开盖,取样测定青贮饲料的青贮品质。结果表明,在高含水量(85.23%)的条件下,无论是否添加乳酸菌,丁酸的含量和氨态氮/总氮均未能达到优质青贮的条件,青贮失败;当含水量为74.70%时,添加乳酸菌组的青贮品质优于未添加组,且随着添加浓度的增加青贮品质更佳;在含水量为65.70%的条件下,无论是否添加乳酸菌添加剂,青贮饲料均能获得较好的青贮品质,但添加乳酸菌后效果更佳。因此,W₃L₃(含水量65.70%+10⁷ cfu/g鲜样)处理的青贮效果最佳。

Abstract: The effects of moisture content and lactic acid bacteria additive on the quality of Italian ryegrass silage were investigated. Italian ryegrass (booting stage) was ensiled in plastic drums for 42 d with application of lactic acid bacteria at 0, 10⁵, 10⁶ and 10⁷ cfu/g fresh weight at three different moisture contents: 85.23%, 74.70% and 65.70%. Ensiling at 65.70% moisture produced good quality silage with or without addition of lactic acid bacteria but the highest quality silage resulted from the application of lactic acid bacteria. Silage quality was also good at 74.70% moisture but only with the addition of lactic acid bacteria; higher bacteria application rates improved silage quality. It is concluded that ensiling at 65.70% moisture with the addition of lactic acid bacteria (10⁷ cfu/g fresh weight) produced the highest quality silage.

中图分类号:

S816.5⁺3

李君临,张新全,玉柱,郭旭生,孟祥坤,罗燕,闫艳红. 含水量和乳酸菌添加剂对多花黑麦草青贮品质的影响[J]. 草业学报, 2014, 23(6): 342-348.

LI Jun-lin,ZHANG Xin-quan,YU Zhu,GUO Xu-sheng,MENG Xiang-kun,LUO Yan,YAN Yan-hong. Effects of moisture content and lactic acid bacteria additive on the quality of Italian ryegrass silage[J]. Acta Prataculturae Sinica, 2014, 23(6): 342-348.

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