補充人工光照處理對不同年齡白羅曼種鵝產蛋之影響

本試驗旨在探討2歲齡與6歲齡種鵝對光照刺激的產蛋表現，並評估老齡種鵝對產期調節的產蛋反應。2歲齡與6歲齡種鵝各20隻（公：母=1：4）分別逢機分為4欄，每欄5隻。人工補充光照開始於11月22日，翌年2月20日結束，每日光照時數合計為20小時，補充光照強度為50 lux。試驗結果顯示，6歲齡種鵝的產蛋趨勢與2歲齡種鵝相同，兩者在全年均有兩個產蛋期，分別出現在繁殖期與非繁殖期。2歲齡與6歲齡種鵝的產蛋數分別為36.8±7.8與17.2±8.0個／年。但6歲齡種鵝對光照刺激的產蛋反應較2歲齡種鵝慢，產蛋高峰較低，且產蛋數較少。綜合以上，此一補充光照方式對6歲齡種鵝亦有產期調節的效果，且在產蛋表現上，2歲齡與6歲齡種鵝對光照的刺激均有相同的反應趨勢，惟6歲齡種鵝群，其對光照刺激後的產蛋反應，在時間上較2歲齡種鵝群慢，且產蛋表現較差。

關鍵字

鵝；年齡；光照；產蛋

並列摘要

The objective of this study was to evaluate the effects of age and lighting manipulation on the seasonal reproductive activity of geese of 2- and 6-year of age. Each of 16 female geese of 2- and 6-year of age were randomly allocated into 4 replicate pens, respectively. The supplemental lighting programs with a daily photoperiod of 20 h were initiated on November 22 and withdrawn on February 20 The intensity of artificial light provided was 50 lux. The results showed that the laying pattern of the older geese was similar to that of the younger ones. Both of their annual laying curves were composed of two laying periods with the second laying period occurring during the non-breeding season of the geese raised under natural lighting conditions. The egg number, laying peak of the older geese were lower than the young geese. The older geese responded to light stimulation later than young geese on egg laying. The egg productive performance of older geese was less than that of the young ones. However, the light program could manipulate the egg production of 6-year and 2-years old geese to non-breeding season. The annual laying curves of both the young and older geese were similar.

並列關鍵字

Geese ； Age ； Lighting program ； Egg production

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