EFFECT OF “BIBU_18” IN BROILERS ON CONDITION OF STRESSES

Jiang Lisheng,Lin Yincai et al (Institute of Animal Science,Guangdong Academy of Agricultural Science , 510640)

stress; high temperature; plasma corticosterone; plasma T 3; plasmaT 4; Bibu_18

This study was conducted to the effect of “Bibu_18”(3g was added into per kilograme drinking water)on bililers in condition of stresses.The following results were obtained:(1)To 0～3 week_old broiler,“Bibu_18”had improved their weight gain and feed conversion ratio,increased their level of serum r_agglutinin and their ratio of survival,but not changed their feed intake.(2) When 5～8week_old broiler kept in high_temperature environment(32℃)for 7 days,their weight gain,feed conversion ratio and feed intake were decreased significantly(P<0.01).While drinking water with“Bibu_18”,their weight gain and feed conversion ratio were increased markedly(P<0.01)but feed intake not changed.(3) During high temperature (32℃,7 days),at 16th hour the levels of plasma corticosterone and T 3 of high temperature control(HNC) group were significantly lower than those of thermoneutral control (TNC) group(P<0.01),but T 4 was higher(P<0.01);at 120th hour the levels of plasma corticosterone and T 3 of HTC group raised and were higher markedly than those of TNC group (P<0.05),T 4 declined (P<0.01) but yet higher than that of TNC group (P<0.05).Those changes of plasma corticosterone,T 3 and T 4 concentration at 16th and 120th hour of “Bibu_18”treatment group appeared the same rule as that of HTC group compared with TNC group.But “Bibu_18”treatment moderated notably those changes induced by high temperature.