Effects Of Light Treatment On Serum Reproductive Hormone Level And Egg Production In Northeast

Background：Zi Goose is unique to the north of goose egg type，the utility model has theadvantages of multi，High value or more,much like humans.The goose industry as a sunriseindustry in twenty-first Century to promote the economic development of theNorth-area. Butbreeding of Zi geese has typical seasonal characteristics, low laying of Goose and supplyshortages of Echu in summer and early fall season are very prominent, which has a greaterimpact on the market price, tTherefore, the effect of different light treatments Northeast ZiGoose seed serum reproductive hormone levels and egg production,The experimental dataprovide important reference for the realization and operation of the extension period and theimplementation of seed Zi goose egg goose-season seed production.Method：Test one Healthy two-year-old Zi geese(female180, male120) in the autumn-winter breeding were selected and randomly divided into3groups. The control group wasprovided with natural light (with a gradual extension of the photoperiod). The experimentalgroups included the short photoperiod (11L:13D) group and long photoperiod (15L:19D) group.Test two Healthy one-year-old Zi geese (female1200, male800) in the spring-summer breedingstate were selected and randomly divided into4groups. The control group was provided withnatural light. The experimental groups included the long photoperiod (15L:9D) group, mediumphotoperiod (13L:11D) group and short photoperiod (12L:12D) group. The levels offollicle-stimulating hormone (FSH), luteinizing hormone (LH), prolactin (PRL)and testosterone(T) of breeding Zi geese(n=30,female15, male15) were detected from every group once inanother week, at the same time, the egg production of Zi geese should be recorded.Result：Test one:Non-breeding season experiment showed that the levels of follicularstimulating hormone (FSH), luteinizing hormone (LH) and testosterone (T) were increasedsignificantly, prolactin (PRL) were increased at the beginning then reduced to the end in longphotoperiod group. While the opposite changes occurred in FSH, LH and T, but PRL increased inshort photoperiod group. At the end of the experiment, the various hormone levels of longphotoperiod group were nearly to the group of natural light, and the Zi geese photoperiod grouphad a tendency to lay eggs. Test two: Breeding season experiment showed that the levels offollicular stimulating hormone (FSH), luteinizing hormone (LH) and testosterone (T) wereincreased, prolactin (PRL) reduced significantly at the beginning then increased to the end inlong photoperiod group. While the opposite changes occurred in FSH, LH and T, but PRLincreased significantly in short and medium photoperiod group. The hormone levels under the long photoperiod exhibited greater fluctuations and persisted longer in the later laying periodthan did layers under other light regimes. In the late experimental stage (September), thehormone levels of different photoperiod groups approached those of the natural light group in thelate breeding phase (June) and displayed prolonged laying period and increased egg output; inMay and June, The hormone levels of the short and medium photoperiod groups were close tothe group of natural light, then reduced, which was accompanied by a decreased egg yield in thetwo groups compared with the natural light group.Conclusion：The photoperiod affected reproductive hormone levels of breeding Zi geese, andreproductive hormone levels of breeding Zi goose varied in different photoperiod group, at thesame time, the change of illumination time also affected the Zi goose egg production cycle. So,the anti-seasonal reproduction of Zi goose would come true by artificial supplemental light,improving the egg production.