飼糧銅鋅含量對來亨蛋雞產蛋性能及銅鋅蓄積率之影響

本試驗旨在探討飼糧中不同銅鋅含量對來亨雞產蛋性能與蛋殼品質之影響，採用來亨蛋雞180隻，分別於25及37週齡時，逢機分飼於六個試驗處理組，試驗為2（銅含量）×3（鋅含量）之複因子試驗。基礎飼糧不額外添加銅鋅，飼糧的銅含量為9ppm或添加硫酸銅使飼糧中銅含量為18ppm；以及添加硫酸鋅，使飼糧中鋅的含量分別為60、90和120ppm。兩個試驗期分別為4週，試驗期間測定產蛋性能及蛋殼品質等。結果顯示，餵飼含鋅60ppm之飼糧的蛋雞有降低產蛋率、產蛋量及飼料換蛋率較差的趨勢，但未達顯著差異。蛋內容物重的百分比以含18ppm銅量組顯著提高（P＜0.05）；蛋殼重百分比及蛋殼厚度則以含60ppm鋅量組顯著較低（P＜0.05）。隨著飼糧中銅鋅含量的增加，均顯著提高糞中銅鋅的含量（P＜0.05）；雞隻體內銅及鋅的蓄積率，有隨著飼糧銅鋅含量提高，而呈顯著線性降低（P＜0.05）。綜上所述，蛋雞產蛋期飼糧含9ppm銅及90ppm鋅飼糧，即可滿足雞隻良好產蛋性能及蛋殼品質所需，且其排泄物可符合國家生產優質堆肥的銅鋅標準。

關鍵字

來亨蛋雞；飼糧銅鋅含量；產蛋性能；銅鋅蓄積率

並列摘要

This experiment was conducted to study the effects of dietary levels of copper and zinc on the laying performances, copper and zinc retention of Leghorn layers. A total of one hundred and eighty Leghorn layers were allocated into six groups at 25 and 37 weeks of age, respectively. The experiment was 2 × 3 factorial which included two dietary Cu levels of 9 and 18 ppm, and three zinc levels of 60, 90 and 120 ppm. Each trials last for 4 weeks, respectively. The laying performance and egg shell quality were measured during the experimental period. This result indicated that providing the dietary 60 ppm Zn had a tendency to reduce egg production, egg mass and feed conversion rate, but those no differences was observed between dietary Cu and Zn levels. Hens fed with 60 ppm Zn diet significantly (P ＜ 0.05) reduced shell/egg weight percentage and shell thickness. The contents of copper and zinc in excreta were increased (P ＜ 0.05) when dietary copper and zinc levels increased. There were linear significantly (P ＜ 0.05) lower retention of copper and zinc when dietary copper and zinc were gradates increased. These results indicated that the concentration of copper and zinc in excreta can meet the national copper, zinc standard and provision of 9 ppm Cu and 90 ppm Zn can have good laying performance and egg shell quality.

並列關鍵字

Leghorn layers ； Dietary copper and zinc levels ； Laying performance ； Retention of copper and zinc

國際替代計量

飼糧銅鋅含量對來亨蛋雞產蛋性能及銅鋅蓄積率之影響

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