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Evaluation of nutritive value of chestnut hull for ruminant animals using in vitro rumen fermentation
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밤 가공 부산물의 반추가축용 사료 가치 평가 : in vitro 반추위 배양

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Type
Academic journal
Author
Sin-Yong Jeong (충남대학교) Hyeon-Seon Jo (충청남도산림환경연구소) Gi-Su Park (충청남도산림환경연구소) Gil-Nam Kang (충청남도산림환경연구소) Nam-Chul Jo (충남대학교) Seongwon Seo (충남대학교)
Journal
Institute of Agricultural Science Korean Journal of Agricultural Science Vol.39 No.3 KCI Accredited Journals
Published
2012.9
Pages
335 - 340 (6page)

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Evaluation of nutritive value of chestnut hull for ruminant animals using in vitro rumen fermentation
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Abstract· Keywords

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During the manufacturing process of chestnut, 50% of biomass is produced as chestnut shell (CS) or chestnut hull (CH), a forestry by-product. Due to its high fiber content and economic benefit, there is a possibility of using chestnut hull as a supplement for a ruminant diet. Few studies, however, have been conducted on evaluating nutritive value of chestnut hull for ruminant animals. The objective of this study were thus to analyze chemical composition of CS, a by-product after the first processing of chestnut, and CH, a by-product after the second processing, and access in vitro rumen fermentation characteristics of them. For the in vitro fermentation using strained rumen fluid obtained from a fistulated Hanwoo steer, commercial total mixed ration (TMR) for dairy goat was used as a basal diet and was replaced with different proportions of chestnut shell and hull. A total number of 13 treatments were carried out in this study: 100% TMR, 100% CS, 100% CH, a mix with 50% CS and 50% of CH (MIX), TMR replaced with 5%, 10%, or 15% of CS, CH, or MIX, respectively. For each treatment, in vitro dry matter digestibility (IVDMD) and pH after 48 hours of rumen fermentation were measured. Gas production at 6, 12, 24, 48 hours of incubation was also analyzed. Compared to CH, CS contains higher level of fiber (NDF, ADF, lignin) and consequently has a lower amount of non-fiber carbohydrate, but no difference was observed in the other nutrients (i.e. crude protein, crude fat, and ash). IVDMD was significantly (p＜0.05) the highest in 100% CH (71.97%) and the lowest in 100% CS (42.80%). Addition of CH by replacing TMR did not affect IVDMD, while an increase in the proportion of CS tended to decrease IVDMD. The total gas production after 48 hours of incubation and the rate of gas production were also the highest in 100% CH and the lowest in 100% CS (P＜0.05). Likewise, the pH after 48 hours of fermentation was significantly (p＜0.05) the lowest in 100% CH (6.33) and the highest in 100% CS (6.50), and no significant difference in gas production was observed when TMR was replaced with CS or CH up to 15% (P＞0.05). In conclusion, CH may successfully be used for a supplement in a ruminant diet. The nutritive value of CS is relative low, but can replace, if not 100%, low quality forage. This study provides valuable information about the nutritive value of CS and CH. An in vivo trials, however, is needed for conclusively accessing the nutritive value of CS and CH.
#Chestnut hull #Forestry by-product #Feed #In vitro rumen fermentation

Contents

Abstract
Ⅰ. 서론
Ⅱ. 재료 및 방법
Ⅲ. 결과 및 고찰
Ⅳ. 요약
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