Abstract

본 연구는 델타-이미노레블린산(ALA)의 급여가 산란계의 생산성 및 계란 품질에 미치는 영향에 대해 알아보기 위하여 시험을 실시하였다. 사양 시험은 30주령 ISA Brown 144수를 공시하였으며 28일간 실시하였다. 시험 설계는 1) CON (기초 사료), 2) 0.05(기초 사료 + ALA 0.05%) 3) 0.1(기초 사료 + ALA 0.1%) 및 4) 0.2(기초 사료 + ALA 0.2%)로 4개 처리를 하여 처리당 4반복, 반복당 12수씩 완전 임의 배치하였다. 전체 사양 시험 기간 동안, 델타-아미노레블린산의 첨가 수준이 증가함에 따라 산란율의 감소가 나타났으나, 0.2% 첨가 수준에서 다시 증가하는 경향을 나타내었다(quadratic effect, P=0.01). 난중은 델타-아미노레블린산의 첨가 수준이 증가함에 따라 무게가 증가하였다(linear effect, P=0.01; quadratic effect, P=0.01). 난황색은 전체 사양 시험 기간 동안, 0.1% 첨가 수준까지 난황색이 높아지다가 0.2% 첨가 수준에서 낮아지는 경향을 나타내었다(quadratic effect, P=0.03). 델타-아미노레블린산의 첨가 수준이 증가함에 따라 혈액 내 hemoglobin 농도가 유의적으로 증가하였다(linear effect, P= 0.01). 결론적으로, 산란계에 델타-아미노레블린산의 급여는 난중 및 난황색 그리고 혈액 내 hemoglobin 농도를 증가시키는 것으로 사료된다. This study was conducted to evaluate the effects of dietary delta-aminolevulinic acid (ALA) on egg production and egg quality in laying hens. A total of 114 (30-wk age) ISA brown commercial hens were used in current trial for 28 days. Dietary treatments included 1) CON (basal diet), 2) 0.05 (basal diet + ALA 0.05%), 3) 0.1 (basal diet + ALA 0.1%) and 4) 0.2 (basal diet + ALA 0.2%). There were four dietary treatments with four replication per treatment and twelve laying hens per replication. During the overall period, egg production was quadratically affected (P=0.01) by ALA supplementation compared with control treatment. Egg weight increased (linear effect, P=0.01; quadratic effect, P=0.01) as the level of delta-aminolevulinic acid supplementation increased in the diets. Yolk color was increased quadratically (P=0.03). The difference of hemoglobin concentration was increased (quadratic effect, P=0.01) as the level of delta-aminolevulinic acid supplementation increased in the diets. In conclusion, the results of the experiment suggest that dietary delta-aminolevulinic acid could affect egg weight, yolk color and hemoglobin concentration in laying hens.

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