Effects of canthaxanthin on laying performance,reproductive hormone level and follicular development of Huaixiang chicken in cyclic high tem-perature environment
Heat stress of chicken caused by high temperature can lead to the seriously decline of reproductive function.Effects of canthaxanthin on laying performance,reproductive hormone level and follicle development of 26-week-old female Huaixiang chickens in cyclic high temperature environment were studied.The results showed that,compared with control group of room temperature,the laying rate,levels of follicle-stimulating hormone(FSH),luteinizing hormone(LH),proges-terone(P4)and estradiol(E2)in serum decreased in Huaixiang chickens exposed to circulating high temperature,and the number of grade follicles,small yellow follicles,large yellow follicles,small white follicles and large white follicles de-creased.The structure of follicular membrane was loose and broken,and the structure of granulosa cells of follicles was damaged.In normal temperature environment,diet added with canthaxanthin could improve laying performance and serum reproductive hormone level of Huaixiang chickens,but had no obvious effect on follicular membrane structure.Adding canthaxanthin into the diet could significantly im-prove laying performance,serum reproductive hormone lev-els and follicle number of Huaixiang chickens in cyclic high temperature to alleviate the looseness,rupture of follicular mem-brane and damage of follicular granulosa cells caused by high temperature.In conclusion,canthaxanthin has strong antioxidant properties,which can improve laying performance,regulate the level of reproductive hormones in serum of Huaixiang chick-ens,and can reduce the harm caused by high temperature to make all levels of follicles develop and ovulate normally.
canthaxanthinHuaixiang chickencyclic high temperaturefollicular developmentlaying rate
NETL
NSTL
万方数据
