Effects of Extruded Linseed Supplementation on Methane Production in Holstein Steers
2017
Woo, Y.W., Seoul National University, Pyeongchang, Republic of Korea | Lee, C.H., Konkuk University, Seoul, Republic of Korea | Bharanidharan Rajaraman, Seoul National University, Pyeongchang, Republic of Korea | Yeo, J.M., Korea National College of Agriculture and Fisheries, Jeonju, Republic of Korea | Lee, W.Y., Korea National College of Agriculture and Fisheries, Jeonju, Republic of Korea | Kim, D.H., Gyeongbuk Provincial College, Yecheon, Republic of Korea | Seon, J., National Institute of Animal Science, Pyeongchang, Republic of Korea | Kim, K.H., Seoul National University, Pyeongchang, Republic of Korea
The present experiment was designed to investigate the effects of extruded linseed supplementation on methane production in Holstein steers. Four Holstein steers fitted with permanent cannulas were assigned to two dietary treatments in a duplicated 2 x 2 Latin square design: a control diet consisting of tall fescue straw (65%) and concentrate (35%), and a treatment diet supplemented with 3.8% extruded linseed by replacing a part of ingredients in the concentrate of the control diet. The concentrates of the control and the treatment diet were isoenergetic and isonitrogenous. Extruded linseed supplementation did not affect dry matter intake but significantly (P less than 0.05) increased the intake of lipid. Rumen pH was significantly (P less than 0.05) lower for control than for treatment. Although there was no significant difference between treatments, the concentration of total VFA in control was 21% higher than in treatment. The concentrations of acetic acid, propionic acid and butyric acid were not different between treatments. Extruded linseed supplementation significantly (P0.05) reduced methane output(g/d) and emission factor. Methane conversion rate was lower for treatment than for control but no significant difference was found. The results of the present study showed that extruded linseed supplementation in the diet of Holstein steers could reduce methane output.
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