摘要
Four male crossbred beef steers about 2 years old were used in a 44 Latin square design to investigate the effect of pelleted sugarcane tops on voluntary feed intake, rumen fermentation and digestibility of nutrients. Experimental treatments were; Control (dried-chopped sugarcane tops (DCST)); PS1 (Pelleted sugarcane tops at 1 cm of diameter); PS2 (Pelleted sugarcane tops at 2 cm of diameter) and PS3 (Pelleted sugarcane tops at 3 cm of diameter). Roughage intake and total dry matter intake were 1.59, 1.62, 1.61, 1.63% BW and 2.09, 2.12, 2.11 and 2.13% BW in control, PS1, PS2 and PS3 treatments, respectively (p<0.05). Digestibility of DM, OM and CP were similar in control and PS3 treatment but there was significant difference (p<0.05) between control and PS1, PS2 treatments. Digestibility of neutral detergent fiber (NDF) and acid detergent fiber (ADF) were 52.89, 50.01, 50.05 and 50.56% and 41.91, 39.96, 39.91 and 39.69% in control, PS1, PS2 and PS3, respectively (p<0.05). Total volatile fatty acids concentrations in rumen contents was 67.68, 65.93, 66.15 and 66.67 mM in control, PS1, PS2 and PS3, respectively (p<0.05). Even though, concentrations of acetate and butyrate (%) were significant different (p<0.05) but concentration of propionate (%) was not affected by treatments (p>0.05). Rumen pH, ammonia nitrogen and plasma urea nitrogen were significantly different (p<0.05) among treatments. From this experiment, it was found that dried-chopped sugarcane tops increased digestibility of nutrients whereas pelleted sugarcane tops increased feed intake in beef cattle. However, pelleted sugarcane tops at 3 cm of diameter did similar result in digestibility and rumen parameters with DCST. Therefore, it could be concluded that pelleting sugarcane top is an alternative way to improve the quality of sugarcane tops for use as ruminant roughage source.
摘要译文
在44拉丁方设计中使用4只约2岁的雄性杂交炖牛肉来研究颗粒状甘蔗顶部对自愿采食的影响，瘤胃发酵和营养物质的消化率。实验性治疗是;对照（干切碎的甘蔗上衣（DCST））; PS1（颗粒状甘蔗顶部直径1厘米）;PS2（直径2厘米的颗粒状甘蔗顶部）和PS3（直径3厘米的颗粒状甘蔗顶部）。粗饲料摄入量和总干物质摄入量分别为1.59,1.62,1.61,1.33％和2.09,2.12,2。对照，PS1，PS2和PS3处理分别为11和2.13％BW（p 0.05）。 DM，OM和CP的消化率在对照和PS3处理中相似，但存在显着差异（p 0。05）在对照和PS1，PS2处理之间。中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的消化率分别为52.89,50.01,50.05和50.56％以及41.91,39.96,39.91和39。对照组分别为69％，PS1，PS2和PS3（p 0.05）。对照组，PS1，PS2和PS3瘤胃内总挥发性脂肪酸浓度分别为67.68,65.93,66.15和66.67 mM，分别（p 0.05）。尽管如此，乙酸盐和丁酸盐的浓度（％）显着不同（p 0.05），但丙酸盐的浓度（％）不受处理的影响（p 0.05）。瘤胃pH，氨氮和血浆尿素氮在处理间差异显着（p 0.05）。从这个实验中，结果发现，干切碎的甘蔗可增加营养物质的消化率，而颗粒状的甘蔗则增加了肉牛的采食量。然而，直径3厘米的颗粒状甘蔗顶部与DCST的消化率和瘤胃参数相似。因此，可以得出结论，制作甘蔗顶部是提高甘蔗顶部质量的另一种方法，用作反刍动物粗饲料来源。
Yuangklang, Chalermpon; Wanapat, M.; Wachirapakorn, C.;. Effects of Pelleted Sugarcane Tops on Voluntary Feed Intake, Digestibility and Rumen Fermentation in Beef Cattle[J]. Asian-Australasian Journal of Animal Sciences, 2005,18(1): 22-26