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http://dx.doi.org/10.5762/KAIS.2021.22.1.468

Effects of Hydrothermal Pretreatment on the Nutritional Values and In Vitro Fermentation Characteristics of Tall Fescue (Festuca arundinacea) and Corn Silage  

Kim, Dong Hyeon (National Institute of Animal Science, Rural Development Administration)
Son, Jun Kyu (National Institute of Animal Science, Rural Development Administration)
Lee, Ji Hwan (National Institute of Animal Science, Rural Development Administration)
Kim, Sang Bum (Rural Development Administration)
Park, Beom Young (National Institute of Animal Science, Rural Development Administration)
Kim, Doo San (National Institute of Animal Science, Rural Development Administration)
Jang, Gul Won (National Institute of Animal Science, Rural Development Administration)
Lim, Hyun Joo (National Institute of Animal Science, Rural Development Administration)
Hur, Tai Young (National Institute of Animal Science, Rural Development Administration)
Kim, Eun Tae (National Institute of Animal Science, Rural Development Administration)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.1, 2021 , pp. 468-476 More about this Journal
Abstract
This study examined the effects of a hydrothermal pretreatment (HP) on the nutritional values and in vitro fermentation characteristics of tall fescue and corn silage. This study was conducted through a factorial design of 2 (control or HP) × 2 (hay; tall fescue or silage; corn). For the HP, forage was placed into a glass bottle with 20% w/v of water, and the glass bottle was sealed and heated to reach a temperature of 121℃ (0.12 MPa). The solid residue and liquid were collected and oven-dried at 65℃ for three days. The dried materials were tested for in vitro fermentation at 39℃ for 24 and 48 h. The content of ADF increased significantly regardless of the forage type. After in vitro incubation for 24 h, the total VFA content was significantly lower after HP, regardless of the forage type (p ≤ 0.05), and the propionate concentration was increased in corn silage with HP (p ≤ 0.05). After 48 hours of in vitro incubation, the propionate content increased significantly (p ≤ 0.03) in corn silage with HP (p ≤ 0.05), but the butyrate content decreased significantly (p ≤ 0.05). There was no change in the in vitro dry matter and neutral detergent fiber digestibility by HP regardless of the forage type. Therefore, the use of hydrothermally pretreated corn silage could be advantageous for the supply of energy for ruminants.
Keywords
Hydrothermal Pretreatment; Tall Fescue; Corn Silage; In Vitro Digestibility; Rumen Fermentation;
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