Effect of Homo or Heterofermentative Inoculants on Fermentation Characteristics and Aerobic Stability of Rye Silage

서지정보

· 발행기관 : 경상대학교 농업생명과학연구원
· 수록지 정보 : 농업생명과학연구 / 51권 / 5호
· 저자명 : Dong Hyeon Kim, Seong Shin Lee, Dimas H. V. Paradipta, Young Ho Joo, Hyuk Jun Lee, Youn Sig Kwak, Ouk Kyu Han, Sam Churl Kim

목차

Introduction
Materials and methods
1 Silage making and sampling
2 Chemical composition and in vitro digestibility
3 Fermentation indices
4 Microbial enumeration and aerobic stability
5 Statistical analysis
Results
Discussion
Conclusion
Acknowledgment
References

영어초록

This study was conducted to estimate the effect of home or hetero fermentative lactic acid bacteria(LAB) on chemical composition, fermentation quality, and aerobic stability of rye silage. Rye forage was harvested at dough stage(28.9% of dry matter), chopped to 3-5 cm length, and divided into 4 piles for different inoculations as treatment, following 1) No additives(CON); 2) Lactobacillus plantarum at rate of 1.5 x 105 cfu/g of fresh forage(LP); 3) L. buchneri at rate of 1.2 x 105 cfu/g of fresh forage(LB); and 4) Mixture of LP and LB at 1:1 ratio(MIX). Rye silage was ensiled into 20 L bucket silo in quadruplicate for 0, 1, 4, 7, and 100 day periods. After 100 days of ensiling, the silage treated with LB had lower acid detergent fiber content(p<0.05), but higher in vitro dry matter digestibility(p<0.05). The LB and MIX reduced (p<0.05) pH more rapidly than CON and LP across the ensiling days, but had no difference on 100 days. Silage treated LP had lowest(p<0.05) acetic acid, but highest(p<0.05) propionic acid. In contrast, LB treated silage had highest(p<0.05) acetic acid, but lowest(p<0.05) propionic acid with the absence of butyric acid. On microbial count, LP treated silage had lowest(p<0.05) LAB, yeast, and aerobic stability, whereas LB and MIX treated silages had highest(p<0.05). Mold was not detected across all silages. Therefore, it could be concluded that heterofermentative LAB solely or combo with homofermentative LAB might improve in vitro dry matter digestibility, fermentation characteristics, and aerobic stability of rye silage harvested at dough stage.

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