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添加糖蜜对青稞秸秆和多年生黑麦草混合青贮发酵品质及营养价值的影响
Effect of molasses addition on fermentation and nutritive quality of mixed silage of hulless barley straw and perennial ryegrass in Tibet

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原现军 1   王奇 1   李志华 1   余成群 2   下条雅敬 3   邵涛 1 *  
文摘 试验在青稞秸秆与多年生黑麦草以6∶4混合的基础上,添加3%,4%和5%的糖蜜,旨在进一步改善混合青贮发酵品质和营养价值,为西藏地区青稞秸秆青贮利用提供理论依据。结果显示,青贮前14天,糖蜜添加组乳酸含量快速增加,pH值迅速下降。对照组pH值未能降至4.2以下,而糖蜜添加组均在4.0左右,乳酸、水溶性碳水化合物含量和乳酸/乙酸显著高于(P<0.05)对照组,氨态氮/总氮均低于对照组,且添加3%糖蜜已达到优质青贮饲料标准。青贮第60天糖蜜添加组有较高的粗蛋白含量,较低的中性洗涤纤维和酸性洗涤纤维含量,各组体外降解率均高于青贮材料。综合考虑,在青稞秸秆和黑麦草以6∶4混合的基础上添加3%的糖蜜可获得优质青贮饲料。
其他语种文摘 To investigate enlargement of feed sources in Tibet, mixtures of hulless barley straw and perennial ryegrass (6∶4) were ensiled with molasses at four levels (0, 3%, 4%, and 5% of fresh weight). Triplicate silos per treatment were opend on 7, 14, 30, and 60 days after ensiling and the fermentation characteristics and in vitro degradability of silages were analysed. Molasses addition quickly and greatly enhanced LA (lactic acid) production but decreased the pH value within 14 days of ensiling. Molasses supplemented silages showed higher (P<0.05) LA/AA (acetic acid), LA and WSC (water soluble carbohydrate) contents but lower pH values and AN (ammonia nitrogen)/TN (total nitrogen) (P<0.05) than the control silage. After 60 days ensiling, silages with added molasses had higher CP (crude protein), lower NDF (neutral detergent fiber) and ADF (acid detergent fiber) contents than the control, and the in vitro degradability of all silages were higher than that of fresh material. These results indicate that 3% molasses addition can effectively improve the fermentation and nutitive quality of mixed silages.
来源 草业学报 ,2013,22(3):116-123 【核心库】
关键词 糖蜜 ; 青稞秸秆 ; 多年生黑麦草 ; 发酵品质 ; 营养价值
地址

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  

2. 中国科学院地理科学与资源研究所, 北京, 100101  

3. 九州大学生物资源与环境学部动物饲料生产与利用研究室, 日本, 福冈, 812-8581

语种 中文
文献类型 研究性论文
ISSN 1004-5759
学科 畜牧、动物医学、狩猎、蚕、蜂
基金 国家科技支撑计划项目 ;  西藏自治区重大科技专项
文献收藏号 CSCD:4852824

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