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 Addition of Chlorella and Lactic Acid Bacteria on Nutritive Value and Fermentation Quality of Fresh Rice Straw Silage

젖산균과 클로렐라 첨가가 생볏짚 사일리지의 사료가치 및 발효품질에 미치는 영향

  • Received : 2015.05.07
  • Accepted : 2015.06.03
  • Published : 2015.06.30
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Abstract

Fresh rice straw silage (RSS) was prepared with lactic acid bacteria (LAB) and chlorella (CA) at the experimental field of National Institute of Animal Science, Cheonan Province, Korea. This experiment consisted of the following eight treatments: control treatment without CA and LAB; treatment of 0.1% CA applied without LAB; treatment of 0.5% CA applied without LAB; treatment of 1.0% CA applied without LAB; treatment of only LAB inoculation without CA; treatment of 0.1% CA inoculated with LAB; treatment of 0.5% CA inoculated with LAB; and treatment of 1.0% CA inoculated with LAB. The content of crude protein of RSS significantly elevated with increased concentration of CA (p<0.05). The levels of acid detergent fiber (ADF), neutral detergent fiber (NDF), total digestible nutrient (TDN), and in vitro dry matter digestibility (IVDMD) showed no significant improvement in all treatments when compared to control. However, the quantity of lactic acid in RSS increased in CA and LAB alone inoculated treatments. Similarly, lactic acid significantly increased in LAB with CA treatments when compared to control. In addition, the number of LAB in LAB treatment increased as compared to control and significantly increased by an increase of CA concentration (p<0.05). Therefore, the nutritive values and quality of RSS can be improved by the addition of CA.

본 연구는 충남 천안 국립축산과학원 식용벼 재배지에서 2012년부터 2013년까지 정상적으로 벼 재배가 이루어지고 수확이 완료된 볏짚을 이용하여 수행하였다. 젖산균 접종 유무에 따라 볏짚사일리지의 사료가치 변화는 나타나지 않았으나 클로렐라 처리구는 대조구에 비해 현저하게 조단백질 함량이 증가하였다(p<0.05). 그리고 클로렐라 농도의 증가에 따라 조단백질 함량이 증가하는 경향을 보였다 (p<0.05). 모든 처리구에서 섬유소와 TDN 함량 및 in vitro 소화율은 차이를 나타내지 않았다. 그리고 젖산균 접종 유무에 따라 볏짚사일리지의 pH 및 유기산 함량 변화는 나타나지 않았으며 클로렐라 처리구도 무처리구에 비해 pH 변화는 나타나지 않았다. 그러나 클로렐라 처리구에서 젖산함량은 무처리구에 비해 유의적으로 증가하였으며 클로렐라 농도의 증가에 따라 젖산함량이 증가하는 경향을 보였다(p<0.05). 젖산균 단독접종구의 젖산균 수는 무처리구에 비해 현저하게 증가하였으며(p<0.05), 클로렐라 농도의 증가에 따라 증가하는 경향을 보였다(p<0.05). 그러나 효모와 곰팡이 수는 비슷한 수준을 나타냈다. 그러므로 볏짚사일리지의 사료가치와 품질은 클로렐라 첨가에 의해서 향상될 수 있다.

Keywords

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