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首页> 外文期刊>Asian-Australasian Journal of Animal Sciences >The effects of additives in Napier grass silages on chemical composition, feed intake, nutrient digestibility and rumen fermentation.
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The effects of additives in Napier grass silages on chemical composition, feed intake, nutrient digestibility and rumen fermentation.

机译：纳皮尔草料青贮饲料中添加剂对化学成分，饲料摄入，养分消化率和瘤胃发酵的影响。

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摘要

The effect of silage additives on ensiling characteristics and nutritive value of Napier grass (Pennisetum purpureum) silages was studied. Napier grass silages were made with no additive, fermented juice of epiphytic lactic acid bacteria (FJLB), molasses or cassava meal. The ensiling characteristics were determined by ensiling Napier grass silages in airtight plastic pouches for 2, 4, 7, 14, 21 and 45 d. The effect of Napier grass silages treated with these additives on voluntary feed intake, digestibility, rumen fermentation and microbial rumen fermentation was determined in 4 fistulated cows using 4x4 Latin square design. The pH value of the treated silages rapidly decreased, and reached to the lowest value within 7 d of the start of fermentation, as compared to the control. Lactic acid content of silages treated with FJLB was stable at 14 d of fermentation and constant until 45 d of ensiling. At 45 d of ensiling, neutral detergent fiber (NDF) and acid detergent fiber (ADF) of silage treated with cassava meal were significantly lower (p<0.05) than the others. In the feeding trial, the intake of silage increased (p<0.05) in the cow fed with the treated silage. Among the treatments, dry matter intake was the lowest in the silage treated with cassava meal. The organic matter, crude protein and NDF digestibility of the silage treated with molasses was higher than the silage without additive and the silage treated with FJLB. The rumen parameters: ruminal pH, ammonia-nitrogen (NH3-N), volatile fatty acid (VFA), blood urea nitrogen (BUN) and bacterial populations were not significantly different among the treatments. In conclusion, these studies confirmed that the applying of molasses improved fermentative quality, feed intake and digestibility of Napier grass.
机译：研究了青贮饲料添加剂对纳皮尔草（Pennisetum purpureum）青贮饲料的养分特性和营养价值的影响。纳皮草青贮饲料不含添加剂，附生乳酸菌（FJLB），糖蜜或木薯粉发酵汁。通过将纳皮尔青贮饲料青贮在不透气的塑料袋中2、4、7、14、21和45 d来确定青贮特性。使用4x4拉丁方形设计，在4头f牛中确定了用这些添加剂处理过的纳皮尔草青贮饲料对自愿采食量，消化率，瘤胃发酵和微生物瘤胃发酵的影响。与对照相比，处理过的青贮饲料的pH值迅速降低，并在发酵开始后7天内达到最低值。 FJLB处理的青贮饲料中乳酸含量在发酵14 d稳定，直到发酵45 d恒定。在青贮45 d时，用木薯粉处理的青贮饲料中性洗涤剂纤维（NDF）和酸性洗涤剂纤维（ADF）显着低于其他饲料（p <0.05）。在饲养试验中，饲喂处理过的青贮饲料的母牛青贮饲料的摄入量增加了（p <0.05）。在这些处理中，木薯粉处理的青贮饲料中干物质摄入量最低。糖蜜处理的青贮饲料的有机质，粗蛋白和NDF消化率高于无添加剂的青贮饲料和FJLB处理的青贮饲料。瘤胃参数：瘤胃pH，氨氮（NH 3 -N），挥发性脂肪酸（VFA），血尿素氮（BUN）和细菌种群在处理之间无显着差异。总之，这些研究证实，使用糖蜜可以改善纳皮草的发酵质量，采食量和消化率。

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