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http://dx.doi.org/10.5333/KGFS.2020.40.3.131

Effects of Rumen pH on Degradation Kinetics and Fermentation Indices of Corn Silage Ensiled with Antifungal and Carboxylesterase Producing Inoculants  

Chang, Hong Hee (Department of Animal Science (Institute of Agriculture & Life Science), Gyeongsang National University)
Paradhipta, Dimas Hand Vidya (Division of Applied Life Science (BK21Plus, Institute of Agriculture & Life Science), Gyeongsang National University)
Lee, Seong Shin (Division of Applied Life Science (BK21Plus, Institute of Agriculture & Life Science), Gyeongsang National University)
Lee, Hyuk Jun (Division of Applied Life Science (BK21Plus, Institute of Agriculture & Life Science), Gyeongsang National University)
Joo, Young Ho (Division of Applied Life Science (BK21Plus, Institute of Agriculture & Life Science), Gyeongsang National University)
Min, Hyeong Gyu (Sancheong Agricultural Technology Center)
Kim, Sam Churl (Department of Animal Science (Institute of Agriculture & Life Science), Gyeongsang National University)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.40, no.3, 2020 , pp. 131-137 More about this Journal
Abstract
The present study investigated effects of antifungal and carboxylesterase inoculant on rumen fermentation with different rumen pH. Corn silage was treated without inoculant (CON) and with a mixed Lactobacillus brevis 5M2 and L. buchneri 6M1 (MIX). Rumen fluid was collected from two cannulated Hanwoo heifers before morning feeding (high rumen pH at 6.70) and 3 h after feeding (low rumen pH at 6.20). Dried corn silage was incubated in the rumen buffer (rumen fluid + anaerobic culture medium at 1:2 ratio) for 48 h at 39℃. Eight replications for each treatment were used along with two blanks. Both in a high and a low rumen pH, MIX silages presented higher (p<0.05) the immediately degradable fraction, the potentially degradable fraction, total degradable fraction, and total volatile fatty acid (VFA) than those of CON silages. Incubated corn silages in a low rumen pH presented lower (p<0.05) total degradable fraction, ammonia-N, total VFA (p=0.061), and other VFA profiles except acetate and propionate, than those in a high rumen pH. The present study concluded that application of antifungal and carboxylesterase inoculant on corn silage could improve degradation kinetics and fermentation indices in the rumen with high and low pH conditions.
Keywords
Antifungal; Carboxylesterase; Inoculant; Rumen; Corn silage;
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