育成期飼糧含硫胺基酸含量對台灣種母土雞生長與產蛋性能之影響

The effects of the dietary total sulfur amino acid on the growth and laying performances of Taiwan native breeder pullets

施柏齡(Bor-Ling Shih) ； 楊珊瑩(Shan-Ying Yang) ； 徐阿里(A-Li Hsu)

《畜產研究》 36卷4期 (2003/12) Pp. 337-345

摘要

本試驗目的在探討育成期飼糧含硫胺基酸含量對種母土雞生長及產蛋性能之影響。以214隻台畜十二號種母土雞，於13週齡時逢機分配至六個處理組，每處理組三重複，飼糧中均含有蛋白質12%，代謝能2900 kcal/kg，飼糧依序添加甲硫胺酸，使含硫胺基酸之含量分別為0.35%、0.40%、0.45%、0.50%、0.55%及0.60%。試驗期間測定飼料採食量、生長性能、初產及產蛋性能等。試驗結果顯示育成期種母土雞之體增重、飼料採食量、整齊度於不同含硫胺基酸飼糧處理組之間均無顯著差異，而飼料效率（飼料／增重）則以含硫胺基酸0.35%明顯較0.50%飼糧者為差（P＜0.05）。種母土雞育成期間血清中甲硫胺酸及含硫胺基酸含量皆隨著飼糧中含硫胺基酸含量提高而增加，以低量（0.36%）含硫胺基酸飼糧處理組顯著較其他飼糧為低（P＜0.05），而血清中總蛋白質濃度則以0.50～0.55%含硫胺基酸飼糧處理組顯著較高（P＜0.05）。16～22週齡之間日齡產蛋量以含硫胺基酸0.4～0.5%處理組顯著較高（P＜0.05）。在50%產蛋率日齡以高量含硫胺基酸飼糧處理組較延遲，但在初產日齡、初產蛋重、5%產蛋率日齡及初產期間（16～22週齡）產蛋率則於各處理組之間並無顯著影響；23～28週齡之母雞之隻日產蛋率、飼料換蛋率及隻日蛋量均以育成期低量含硫胺基酸（0.35%）飼糧處理組顯著較差的趨勢。綜合上述試驗結果，種母土雞育成期飼糧含粗蛋白質12%時，其含硫胺基酸含量應含0.40%～0.46%，以符合延遲性成熟時間及增加初產蛋重的目的。

關鍵字

土種小母雞 ； 含硫胺基酸 ； 產蛋性能

並列摘要

This experiment was conducted to study the effects of dietary total sulfur amino acid (TSAA) on the growth and laying performance of Taiwan native breeder pullets. A total of 214 TLRI breeder pullets were used. The chicks were fed practical diets till 13 weeks of age. After that, the pullets were alloted into 3 replicates of 6 treatments and fed one of the 6 experimental diets which contained CP 12% and ME 2900 kcal/kg. DL-methionine were added to the diets containing 0.35, 0.40, 0.45, 0.50, 0.55 and 0.60% of TSAA, respectively for 6 weeks. Feed and water were supplied ad libitum during the grow ing and laying period. The growth performance, traits of first egg and laying performance were measured. The results indicated that dietary TSAA did not affect daily feed intake, weight gain or uniformity of flock. The pullets fed on 0.35% of TSAA had significantly (P ＜ 0.05) lower feed efficiency. Methionine and TSAA contents in serum increased with the increment of TSAA in the diets. Egg mass per hen-day increased significantly (P ＜ 0.05) when dietary TSAA levels reached 0.4~0.5% during 16~22 weeks of age. During first laying period, age of 50% egg production was delayed when hens were fed on higher levels of TSAA (P ＜ 0.05). However, the traits of onset of laying including age of 5% egg production, age at first egg, egg weight or hen-day egg production from 16 to 22 weeks of age were not affected by different TSAA levels during growing period. The hens receiving the diet containing 0.35% of TSAA performed significantly (P ＜ 0.05) poorer in hen-day egg production, egg efficiency and mass from 22 to 28 weeks of age. The results showed that under ad libitum feeding during growing period with 12% of CP must be banlanced with 0.4~0.46% of TSAA to meet the nutrient requirement for heavier egg weight to promote the laying performance for native breeder pullets.

並列關鍵字

Taiwan Native breeder pullets ； Total sulfur amino acid ； Laying performances