Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Effect of Moisture Content on Physical and Chemical Characteristics of Italian Ryegrass Cube

수분 함량이 이탈리안 라이그라스 큐브의 물리적 및 화학적 성상에 미치는 영향

  • Received : 2016.01.21
  • Accepted : 2016.03.04
  • Published : 2016.03.31
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Abstract

The objective of this study was to determine the effect of moisture content on the physical and chemical characteristics of Italian ryegrass cube. Cube quality according to moisture contents (15, 20, 25, and 30%) was determined. Cubes made with 15 to 20% moisture showed a little cracks. But, the amount of powder generate from these cubes were lower by 10 to 16% compared to other cubes made with 25 to 30% moisture contents. The highest hardness at 159 kg/f was obtained when the cube was made with 15% moisture content and the lowest was 70 kg/f when the cube was made with 30% moisture content. The electrical loading and surface temperature were increased when moisture content was decreased. The chemical compositions of cube were differ from those of raw materials. Crude protein (CP) and ether extract (EE) contents were increased after cubing works. However, crude fiber (CF), acid detergent fiber (ADF), and neutral detergent fiber (NDF) contents were decreased after cubing. The crude ash content was not significantly (p > 0.05) different between raw material and cube. Higher moisture content resulted in higher crude protein content. However, crude fiber and crude ash content were not significantly (p > 0.05) different between each other. The contents of ADF and NDF were the lowest in cubes made with 30% moisture content. Our results suggest that the proper moisture content of Italian ryegrass cubing is recommended to be 15 to 20% and that cubing works should help increase forage quality.

본 시험은 가공 조사료 이용확대를 위해 압축 방법과 수분 함량이 이탈리안 라이그라스 큐브의 물리적 및 화학적 성상에 미치는 영향을 구명하기 위하여 수행되었다. 이탈리안 라이그라스 큐브 제작을 위해 평판 다이형 큐브 기계를 직접 제작하였으며 이탈리안 라이그라스의 수분 함량을 15, 20, 25 및 35%로 조절하여 큐브를 제조하여 품질을 조사하였다. 수분 함량이 15~20%에서는 간헐적인 균열이 일어났으며 가루 발생량도 10~16%로 다른 처리보다 낮게 나타났다. 경도에 있어서도 15% 수분 함량에서 159 kg/f로 가장 높게 나타났으며 30% 수분 함량에서는 70 kg/f로 가장 낮았다. 그러나 전기 부하량과 큐브의 표면 온도는 수분 함량이 낮은 곳에서 더 높게 나타났다. 수분 함량에 따른 큐브의 일반 조성분은 조제전에 비하여 조단백질과 조지방 함량은 높아졌으며 조섬유, ADF, NDF 함량은 감소하는 것으로 나타났다. 조회분 함량은 수분 함량 30%를 제외하고는 큐브 조제 전후간에 차이를 보이지는 않았다. 수분 함량에 있어서는 수분이 많아질수록 조단백질 함량이 증가되는 경향을 보였으며 조섬유, 조회분 함량은 처리간에 차이가 나타나지 않았다. NDF 및 ADF 함량은 30% 수분 함량에서 가장 낮게 나타났다. 이상의 결과를 종합하여 볼 때 이탈리안 라이그라스 큐브 조제를 위한 적정 수분함량은 15~20% 내외로 추정되며 이로 인해 사료적 가치가 향상되는 것으로 나타났다.

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