不同精粗比日粮添加甘露寡糖对绵羊瘤胃纤维降解率的影响

doi:10.16431/j.cnki.1671-7236.2015.12.015

Abstract

Abstract: To investigate the effect of adding mannan oligosaccharide to diets with different concentrate to forage ratios on the degradability of neutral detergent fiber (NDF) and acid detergent fiber(ADF) in rumen of sheep by nylon bags technique,6 wethers (White Suffolk♂×Small-tailed Han sheep♀) installed permanent rumen fistula were used for offering rumen fluid.The 4×6 two-factor experimental design was chosen and the two factors were the ratio of concentrate to forage (A1(20:80),A2(30:70),A3(40:60),A4(50:50)) and the dose of mannan oligosaccharide (B1 (0),B2 (0.4%),B3 (0.8%),B4 (1.2%),B5 (1.6%),B6 (2.0%)).The results showed that the rumen degradability of NDF and ADF in different times,degradation parameters and effective degradability were influenced by the factor A significantly (P< 0.05).The rumen degradability of NDF and ADF in each time of group A1 were higher than group A3 and A4 (P< 0.05).Expect for 24 h,the rumen degradability of ADF were influenced significantly by the factor B,and the rumen degradability of ADF in group B5 was higher than group B1 and B2 (P< 0.05).The rumen effective degradability of NDF in group A3 was significantly higher than groups A1 and A2 (P< 0.05), and a little higher than group A4 (P >0.05),which showed that the rumen effective degradability of NDF and ADF were higher when the ratio of concentrate to forage was 40:60.

Key words: sheep; concentrate to forage ratio; mannan oligosaccharides; nylon bags technique; rumen degradability of fiber

CLC Number:

S826

ZHAO Chen, CHEN Zhi-long, ZENG Yan-xia, WANG Lin, ZHENG Chen. Effect of Adding Different Mannan Oligosaccharide to Diets with Different Concentrate to Forage Ratios on Rumen Degradability of Fiber in Sheep[J]. , 2015, 42(12): 3210-3216.

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Effect of Adding Different Mannan Oligosaccharide to Diets with Different Concentrate to Forage Ratios on Rumen Degradability of Fiber in Sheep

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