Effect of Linseed Oil Calcium Salt on the Methane Emission and Carcass Characteristics of Beef Cattle.

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  • 褐毛和種肥育牛に対するアマニ油脂肪酸カルシウムの給与がメタン発生と肥育成績に及ぼす効果
  • カツモウ ワシュ ヒイクギュウ ニ タイスル アマニユ シボウサン カルシウム ノ キュウヨ ガ メタン ハッセイ ト ヒイク セイセキ ニ オヨボス コウカ

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Abstract

To determine the effect of linseed oil calcium salt supplementation on the suppression of methane emission from feedlot beef cattle in order to suppress methane emission from beef cattle, 12 Japanese Brown steers were used. Steers were allocated into two treatment groups. One group (control) was fed a concentrate (TDN ; 71.5%, CP ; 13%) and chopped Italian ryegrass hay ad libitum and the other group (FAT) was fed a concentrate supplemented with 4% linseed oil calcium salt for 10 months. Methane emission was measured at pre-treatment, 1, 5, and 10 mo of experimental period by using the open circuit respiration chambers or ventilated hoods. Dry matter intake (DMI) and energy intake were not different between the treatment groups. The body weight gain in FAT group was higher than in control group, though not statistically significant. Rib eye area, BMS No. and ether extract of m. longissimus dorsi were not different between the two groups. The methane emission per DMI in FAT group was lower than in control group during the experimental period, though not statistically significant. The reduction of methane emission per DMI in the FAT group during the experimental period was about 70% as calculated from the hydrogenation of supplemented unsaturated fatty acid. The methane emission per body weight gain in FAT group was 13% lower than in control group. Methane emission per body weight gain was positively correlated with feed : gain ratio. It seems that supplementation of linseed oil calcium salt for a long period suppresses methane emission from feedlot beef cattle without any effects on growth performance and carcass quality.

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