Effects of different levels of Isatis tinctoria ultrafine powder additions on the production performance of Ctenopharyngodon idellus fingerlings
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.
万方数据
维普
