The aim of this experiment is to investigate the effects of flaxseed meal on the growth performance,carcass quality,and muscle fatty acid composition of fattening pigs.160 growing pigs with a weight of(71.49±1.48)kg and good health were selected and randomly divided into 4 groups according to the principle of male and female half,with 5 replicates in each group and 8 pigs in each replicate.Feed experimental diets with 0,4,8,and 12%flaxseed meal instead of soybean meal separately.Test duration 42 days.The experimental results showed that adding 4%and 8%flaxseed meal to the diet significantly increased the final body weight of fattening pigs by 2.84%and 4.04%(P＜0.05);The addition of 4%and 8%flaxseed meal to the feed significantly increased the average daily weight gain of fattening pigs by 8.13%and 12.14%(P＜0.05);The addition of 8%flaxseed meal to the feed significantly reduced the feed weight ratio of fattening pigs by 7.94%(P＜0.05);In addition,adding flaxseed meal to the feed had no significant effect on the average daily feed intake of fattening pigs(P＞0.05).Adding 4%flaxseed meal to the diet significantly reduced the content of myristic acid(C14:0)in the muscle of fattening pigs(P＜0.05),and significantly reduced the content of stearic acid(C18:0)(P＜0.05);The addition of 4%and 8%flaxseed meal to the diet significantly reduced the content of palmitic acid(C16:0)in the muscle of fattening pigs(P＜0.05),while the total fatty acid content significantly increased(P＜0.05);The addition of flaxseed meal to the diet significantly increased the content of eicosenoic acid(C20:1)in the muscle of fattening pigs(P＜0.05);The addition of 8%flaxseed meal to the diet significantly reduced the saturated fatty acid content in the muscle of fattening pigs(P＜0.05),and the monounsaturated fatty acid content significantly decreased(P＜0.05).Under the conditions of this experiment,the optimal amount of flaxseed meal added is 8%.
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