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http://dx.doi.org/10.5333/KGFS.2014.34.2.94

Effects of Bacterial Inoculants and Organic Acids on Silage Quality : Meta-analysis  

Cho, Sangbuem (Animal Resources Research Center, Konkuk University)
Kwon, Chan Ho (Department of Horse and Exotic Animal Science, Kyungpook National University)
Kim, Eun Joong (Department of Animal Science, Kyungpook National University)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.34, no.2, 2014 , pp. 94-102 More about this Journal
Abstract
This study was conducted to estimate and compare the effects of bacterial inoculants and organic acids on silage quality. Silage pH, lactate, acetate, lactate:acetate ratio, propionate, butyrate, water-soluble carbohydrate, crude protein, ammonia-N, neutral detergent fiber and acid detergent fiber (ADF) were used as parameters for quality analysis and a meta-analysis technique was employed to determine the effect size. As a data pool for analysis, we examined 14 research papers. Bacterial inoculants were found to elevate pH, lactate, acetate, lactate:acetate ratio, propionate and ADF contents compared to the controls (p<0.01). In contrast bacterial inoclulants decreased butyrate, water-soluble carbohydrate, crude protein and ammonia-N contents (p<0.01). In the organic acid treatments, all parameters except ADF showed higher contents than the control (p<0.01). In the comparison of effect sizes between the two treatments, significant differences were detected in butyrate, water-soluble carbohydrate, crude protein and ammonia-N (p<0.05). It may be concluded that bacterial inoculants could improve silage quality in terms of the aforementioned four parameters compared with organic acid treatments.
Keywords
Silage quality; Fermentation; Bacterial inoculants; Organic acids; Meta-analysis;
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