In order to investigate the effects of adding different levels of Isatis tinctoria ultramicro powder on the pro-duction performance of grass carp(Ctenopharyngodon idella).In this experiment,240 juvenile grass carp with ini-tial weight of(45.12±1.13)g and healthy specification were selected and randomly divided into 4 groups with 3 replicates each,and every 20 juvenile grass carp was 1 replicate group,and the groups were supplemented with 0％(test group 1),1％(test group 2),3％(test group 3),and 5％(test group 4)of Isatis tinctoria ultramicro pow-der in the basal diet,respectively.The pre-test was 1 week and the test period was 8 weeks.The results showed that the growth rate,survival rate and feeding rate of grass carp in test group 2,test group 3 and test group 4 were higher than that of test group 1 with no significant difference(P＞0.05).The growth rate and specific growth rate of grass carp in test group 3 and test group 4 were significantly higher than that of test group 1(P＜0.05),and the bait coefficient of grass carp in test group 3 and test group 4 were significantly lower than that of test group 1(P＜0.05).The study showed that different levels of Isatis tinctoria ultramicro powder could improve the growth per-formance of grass carp larvae,and it was more appropriate to add 3％Isatis tinctoria ultramicro powder.
维普
万方数据
