白花草木樨与燕麦混合青贮的研究　　　

Mixed silage of Melilotus albus and Avena sativa

试验设置了单贮白花草木樨(Melilotus albus)、单贮燕麦(Avenasativa)、70%白花草木樨和30%燕麦混贮、50%白花草木樨和50%燕麦混贮与30%白花草木樨和70%燕麦混贮5个处理组,贮后分别测定其发酵品质和化学成分,由此找出白花草木樨和燕麦混合青贮的最佳比例。结果表明,单贮白花草木樨的pH值、氨态氮占总氮含量、干物质和粗蛋白含量显著高于其他4组青贮饲料(P<0.05),单贮燕麦的pH值和氨态氮占总氮含量显著低于其他4组青贮饲料(P<0.05),单贮燕麦的粗蛋白含量与燕麦添加比例为70%的混贮没有显著差异(P>0.05);单贮燕麦的乳酸、中性洗涤纤维和酸性洗涤纤维含量均显著高于单贮白花草木樨(P<0.05),但与燕麦添加比例为70%的混贮没有显著差异(P>0.05);单贮白花草木樨的丁酸含量明显高于白花草木樨添加比例为70%的混贮饲料(P<0.05),其他3组没有检测出丁酸。综合试验结果,单贮燕麦可以得到优良的青贮饲料,且燕麦添加比例为70%的混贮效果较好,且燕麦添加比例为50%混贮的效果与其相近。

The fermentation quality and chemical components of the ensiled white sweet clover （Melilotus albus）and oats （Avena sativa）were investigated in this study. The forages was either ensiled solely or ensiled by mixing the sweet clover and oats at the rates of 70 ： 30, 50 ： 50 and 30 ： 70 to determine the optimal mixture between white sweet clover and oats. The results of this study indicated that the pH value, content of ammonia nitrogen, content of dry matter and crude protein content of directly ensiling white sweet clover was significantly higher （P〈0.05） than that of other four groups. The pH value and content of ammonia nitrogen of directly ensiling oats was significantly lower than that of other four groups （P〈0.05）. There were no differences between directly ensiling oats and mixed silage which had 70 % oats in the crude protein content. The content of lactic acid, neutral detergent fiber content and acid detergent fiber content of directly ensiling oats was significantly higher （P〈0.05） than that of directly ensiling white sweet clover, but there were no differences in mixed silage which had 70 % oats. Butyric acid content of directly ensiling white sweet clover was markedly higher than that of the mixed silage which had 70% white sweet clover （P〈0.05）. There was no butyric in other three groups. This study suggested that the directly ensiling oats was better feed, and the effectiveness of the mixed silage which had 70% oats was better. It was similar with the mixed silage which had 50% oats.