Effects of Flaxseed on Rumen Fluid pH, Ciliate Number and Nutrient Apparent Digestibility of Meat Sheep

AO Ligerima; SHUANG Jin; LI Ming; HOU Xianzhi; YAN Sumei

doi:10.3969/j.issn.1006-267x.2014.05.010

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 5: 1203 - 1213

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.05.010

Ruminant Nutrition

Effects of Flaxseed on Rumen Fluid pH, Ciliate Number and Nutrient Apparent Digestibility of Meat Sheep

AO Ligerima ,
SHUANG Jin ,
LI Ming ,
HOU Xianzhi ,
YAN Sumei

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College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China

Received date: 2013-11-01

Online published: 2014-05-05

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Abstract

This experiment was conducted to study the effects of flaxseed on rumen fluid pH, ciliate number and nutrient apparent digestibility of meat sheep. Twelve 1-year-old wethers with similar body weight were randomly divided into four groups with three replicates in each group and 1 sheep per replicate. Sheep in control group were fed a basal diet (without flaxseed), and the flaxseed for sheep in experimental groups were processed under three different modes, which were uncooked grain, saute grain and grounding, respectively. The experiment was consisted of three successive 4×4 Latin square tests, and the supplemental levels of flaxseed were 75, 150 and 225 g/d, respectively. The experiment lasted for 180 days with 60 days and four stages (15 days per stage) in each Latin square test. The results showed as follows: 1) considering ruminal flaxseed degradation rate, grinding group at different fermentation time points was all significantly higher than uncooked grain group and saute grain group (P<0.01). 2) Considering rumen fluid pH, with the increase of time after feeding, it showed a tendency of ‘down-up-down-up’; grinding group > uncooked grain group > saute grain group > control group; the supplemental levels showed 225 g/d > 150 g/d > 75 g/d. 3) Considering ciliate number, with the increase of time after feeding, it was decreased; saute grain group > control group > uncooked grain group > grinding group; with the increase of supplemental level, it showed a decreasing tendency. 4) Considering dietary ether extract (EE) apparent digestibility, saute grain group > control group > grinding group > uncooked grain group; the highest value appeared in saute grain group, while the lowest value appeared in uncooked grain group when the supplemental level was 225 g/d; considering the apparent digestibility of dietary crude protein, neutral detergent fiber and dry matter, saute grain group > control group>uncooked grain group > grinding group; the highest values appeared in saute grain group, while the lowest values appeared in grinding group when the supplemental level was 225 g/d. The results indicate that dietary supplementation of flaxseed can affect rumen micro-ecosystem balance, and change microbial organisms' bio-hydrogenation rate, eventually cause the fluctuation of rumen fluid pH, which will affect ruminal microorganisms (including ciliate) number and structure, and all these changes can affect ruminal fermentation function and dietary nutrient apparent digestibility. The treatment of saute grain of flaxseed has better effects on improved ruminal fermentation environment and dietary nutrient apparent digestibility of meat sheep.

Key words： flaxseed; rumen fluid pH; ciliate; degradation rate; apparent digestibility; meat sheep

Cite this article

AO Ligerima , SHUANG Jin , LI Ming , HOU Xianzhi , YAN Sumei . Effects of Flaxseed on Rumen Fluid pH, Ciliate Number and Nutrient Apparent Digestibility of Meat Sheep[J]. Chinese Journal of Animal Nutrition, 2014 , 26(5) : 1203 -1213 . DOI: 10.3969/j.issn.1006-267x.2014.05.010

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