[Results] The weaning weight of SY2 during the 28 days of the trial period was 9.57kg, the average daily gain was 283.57g, the average feed intake was 1113.63g, and the average feed-to-meat ratio was 0.18, which was the best production result in this trial (P0.05) ); The control difference between SY2, SY3 and SY4 group was not significant (P>0.05). The difference between SY2 and DZ group was extremely significant (P
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