Effects of adding compound enzymes to low protein diet on growth performance,nutrient utilization efficiency,and harmful gas emissions of growing pigs
The article aims to explore the effects of adding complex enzymes to low protein diets on the growth performance,nutrient utilization efficiency,and harmful gas emissions of growing pigs.120 90 day old hybrid growing pigs with an average weight of(48.59±1.27)kg were randomly divided into 4 groups,each with 5 replicates and 6 pigs per replicate.The experiment lasted for 101 days(including a pre feeding period of 8 days and a trial period of 93 days).Add 0,300,600,and 900 mg/kg of complex enzyme preparations to the low protein diet in the experimental diet.The results showed that compared with the control group,adding 600 and 900 mg/kg composite enzymes to the diet significantly increased the final body weight of growing pigs by 4.8%and 6.7%(P＜0.05);Significantly increased the average daily weight gain of growing pigs by 8.5%and 12.4%;Significantly increased the average daily feed intake of growing pigs by 3.4%and 7.7%(P＜0.05);Significantly reduce the feed to weight ratio of growing pigs by 4.8%and 6.4%(P＜0.05).Compared with the control group,adding 600 and 900 mg/kg composite enzymes to the diet significantly increased the apparent digestibility of crude protein,nitrogen,and energy in growing pigs(P＜0.05).Compared with the control group,adding 600 and 900 mg/kg composite enzymes to the diet significantly reduced the fecal nitrogen and phosphorus emissions of growing pigs(P＜0.05);The addition of 600 and 900 mg/kg composite enzymes to the diet significantly reduced the ammonia emissions of growing pigs from 4 to 24 hours;In addition,no emissions of hydrogen sulfide were detected in this experiment.In summary,under the conditions of this experiment,the optimal amount of composite enzyme added is 900 mg/kg.
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万方数据
维普
