紫花苜蓿与无芒雀麦不同混播比例对青贮品质的影响

发布时间：2018-03-18 16:18

本文选题：紫花苜蓿　切入点：无芒雀麦　出处：《草地学报》2017年02期 　论文类型：期刊论文

【摘要】：紫花苜蓿(Medicago sativa L.)粗蛋白质含量高而含糖量较低,按常规方法单独青贮不易成功,与禾本科(Gramineae)牧草混播混贮,则可提高含糖量从而改善青贮效果。试验采用紫花苜蓿单播播种量(15kg·hm-2)和无芒雀麦(Bromus inermis Leyss)单播播种量(30kg·hm-2)的各60%,80%和100%组成9个混播处理,以单播为对照,探讨不同混播组合对青贮营养品质和发酵品质的影响。结果表明:与单播紫花苜蓿相比,混播可提高可溶性糖和乳酸含量,降低NH3-N/TN含量,且随无芒雀麦混播比例的增加,变化趋势更加明显。其中100%无芒雀麦单播播量(30kg·hm-2)+60%紫花苜蓿单播播量(9kg·hm-2)的混播组合,可溶性糖含量达1.23%,乳酸含量达3.82%,分别比单播紫花苜蓿提高了192.86%和178.83%,NH3-N/TN含量为4.94%,比单播紫花苜蓿降低了30.62%,感官评定得分最高达19分,在各混播组合中,综合评价最高。
[Abstract]:The crude protein content of Medicago sativa L. was high and the sugar content was low. It was difficult to succeed in silage alone by conventional method, and mixed with Gramineae forage forage. The single seeding amount of alfalfa (15kg 路hm-2) and bromus inermis Leyss2 (30kg 路hm-2) were used in the experiment, which consisted of nine mixed sowing treatments, 60% and 100%, respectively, in which the monoculture was used as the control, and the results showed that the monoculture rate of alfalfa was 15kg 路hm-2 and that of Bromus inermis Leyss2) was 30 kg 路hm-2. The effects of different mixed sowing combinations on silage nutritional quality and fermentation quality were studied. The results showed that mixed sowing could increase soluble sugar and lactic acid content and decrease NH3-N/TN content compared with monoculture alfalfa. The change trend was more obvious, among them, 100% single seeding amount of bromegrass was 30 kg 路hm-2) 60% alfalfa monoculture amount was 9 kg 路hm-2). The content of soluble sugar and lactic acid reached 1.23 and 3.82, respectively, which increased 192.86% and 178.83% NH _ 3-N / N / TN of monoculture alfalfa by 192.86% and 178.83%, respectively, and decreased 30.62% than that of monocast alfalfa. The highest score of sensory evaluation was 19 points.
【作者单位】：东北农业大学动物科技学院;
【基金】：公益性行业(农业)科研专项"青藏高原羊八井社区饲草增产增效关键技术"(201203007)资助
【分类号】：S816.53

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