Abstract
본 시험은 수확시기가 옥수수 톤백 사일리지의 품질에 미치는 영향을 구명하기 위하여 2009년부터 2010년까지 국립축산과학원에서 수행되었다. 옥수수 사일리지 전용 품종인 광평옥을 이용하여 숙기별 3회(유숙기, 황숙기 및 완숙기)에 걸쳐 수확을 하여 사일리지로 조제하였다. 숙기가 진행됨에 따라 옥수수 원형 곤포 사일리지의 조단백질 함량은 감소하는 경향을 보였으나 ADF와 NDF 함량 그리고 TDN 및 in vitro 건물소화율은 비슷하였다. 숙기별 수분함량, pH 및 사료가치는 사일리지 제조 방법 및 젖산균에 의해 영향을 받지 않았다. 유숙기에서 옥수수 톤백 사일리지의 젖산 함량은 원형 곤포 사일리지보다 증가하였으나(P<0.05), 황숙기 및 완숙기에서는 옥수수 톤백 사일리지의 젖산 함량이 원형 곤포 사일리지보다 감소하였다(P<0.05). 유숙기에서 옥수수 톤백 사일리지의 Flieg's score는 원형 곤포 사일리지보다 높았다. 그리고 옥수수 톤백 사일리지와 원형 곤포 사일리지의 Flieg's score는 젖산균에 의해서 영향을 받지 않았다. 따라서 본 연구에서는 옥수수 톤백 사일리지는 새로운 사일리지 제조방법이 될 수 있고 또한 양질의 사일리지 발효에 적합한 것으로 나타났다. This study was conducted to investigate the effect of harvest stage of corn on the quality of gunny bag silage manufactured with corn grown in paddy land of Department of Animal Resources Development, National Institute of Animal Science, RDA from 2009 to 2010. Corn "Kwangpyungok" was harvested at three different growth stages (milk, yellow ripen and ripen stage) and ensiled at each harvest stages. The content of crude protein (CP) of corn in gunny bag silage decreased with delayed harvest maturity, but the contents of ADF (acid detergent fiber), NDF (neutral detergent fiber), TDN (total digestible nutrient) and in vitro dry matter digestibility (IVDMD) were not changed with delayed harvest maturity. The contents of moisture, pH, and the nutritive values at three different harvest stages were not influenced by the method of silage manufacture and inoculant. The content of lactate in corn bag silage at milk stage was significantly increased (P<0.05), as compared with that of round baled corn silage. However, The contents of lactate in corn bag silage at yellow ripen stage and ripen stage were significantly decreased (P<0.05). Flieg's score in corn bag silage manufactured at milk stage increased as compared with that of round baled corn silage, and Flieg's score was hardly influenced by inoculant. Therefore, we suggest that manufacture method of bag silage can be new silage technique to improve the fermentation of corn silage and that smallscale stock farmer could be substituted bag silage for roll bale silage on small farm land.
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More From: Journal of The Korean Society of Grassland and Forage Science
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