Effect of natural oil supplement to ration on methane emission and fattening in ruminant animal

l。添加红花油对控制绵羊甲烷排放及营养价值的影响：选取4只羊，按80%的比例饲喂粗料：精料=2:8的日粮。喂食。红花油添加量分别为日粮的2.5%、5.0和7.5%。随着红花油添加量的增加，甲烷排放量降低率较高。添加红花油可提高其营养价值。2.添加菜籽油对不同粗饲料和精料日粮中呼出气体甲烷排放的控制：选取4只羊，按体重的2%（干物质基础）饲喂粗饲料：精料=2:8和8:2的日粮。菜籽油添加量分别为日粮的5.0和7.5%。添加菜籽油后，高粗料组甲烷排放量降低12%，高精料组甲烷排放量降低15%。添加天然油脂对绵羊甲烷排放及增肥的影响：体外实验中，添加天然油脂可使甲烷排放量降低3 ~ 11%。选用6只绵羊进行育肥试验。粗料与精料的比例为2:8，日粮中添加2.5%的天然油脂。实验动物饲养育肥4个月。通过添加油脂，饲料转化率有提高的趋势，不饱和脂肪酸即皮下油酸和亚油酸以及腰、肋肌亚油酸增加。饲粮中添加天然油脂和甘油对控制绵羊甲烷排放的影响：饲喂粗料：精料=2:8的日粮4只羊。不同不饱和水平的天然油脂和甘油在饲粮中添加5%。高不饱和油显著降低了甲烷排放量。通过补充油脂来提高营养价值。挥发性脂肪酸依次为丙酸发酵型高不饱和油0x(3E)0x（3E）甘油=低不饱和油0x（3E）非补充。

l . Effect of safflower oil supplement on control of methane emission and nutritive value in sheep : Four sheep were fed the ration (roughage : concentrate=2:8) at 80% level of ad lib. feeding. Safflower oil was supplemented at the levels of 2.5, 5.0 and 7.5 % of ration. Decreasing rate of methane emission was high as the supplement of safflower oil increased. Nutritional value was improved by safflower oil supplement.2. 2.Control of methane emission from expiratory gas by rapeseed oil supplement in sheep fed different rations of roughage and concentrate : Four sheep were fed the ration (roughage : concentrate=2:8 and 8:2) at 2% level (dry matter basis) of body weight. Rapeseed oil was supplemented at 5.0 and 7.5 % of ration. Methane emission decreased 12% in high roughage and 15% in high concentrate with rapeseed oil supplement, respectively.3. Effect of natural oils supplement on methane emission and fattening in sheep : Methane decreased 3〜11%, by supplements of natural oils, in vitro. Six sheep were used for fattening trial. The ratio of roughage and concentrate was 2:8 and natural oil was supplemented 2.5% to the ration. Experimental animals were fed to fatten for 4 months. By supplement of oil, feed conversion ratio was tended to improve and unsaturated fatty acids increased i.e., oleic and linoleic acids in subcutaneous and linoleic acid in loin and rib muscles.4. Effect of natural oil and glycerol supplements on control of methane emission in sheep : Four sheep were fed the ration (roughage:concentrate=2:8). Natural oils with different unsaturated levels and glycerol were supplemented 5% of diets. Methane emission decreased remarkably by highly unsaturated oil. Nutritive value was improved by supplement of oils. Volatile fatty acid became propionic acid fermentation type of highly unsaturated oil 0x(3E)0x(3E)glycerol=lowly unsaturated oil 0x(3E)non supplement in order.