Ruminal microbial responses in fermentation characteristics and dry matter degradability to TDN level of total mixed ration
| Autor: | Sungkwon Park, Sun-Sik Chang, Xiang Zi Li, Seung-Uk Lee, Jin-Ho Jo, Seong Ho Choi, Ki-Young Chung, Jun Jeong, Chang-Weon Choi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
0402 animal and dairy science 04 agricultural and veterinary sciences Total mixed ration Biology 040401 food science 040201 dairy & animal science Rumen 0404 agricultural biotechnology Nutrient Animal science chemistry Biochemistry Propionate Dry matter Fermentation Digestion Incubation |
| Zdroj: | Korean Journal of Agricultural Science. 43:80-86 |
| ISSN: | 2466-2402 |
| DOI: | 10.7744/kjoas.20160010 |
| Popis: | An in vitro trial was conducted to examine the effects of total mixed rations (TMR) on fermentation characteristics and effective degradability (ED) by rumen microbes. Three TMR diets were growing period TMR (GR-TMR, 67% TDN), early fattening period TMR (EF-TMR, 75.4% TDN) and late fattening TMR (LF-TMR, 80% TDN). Three TMR diets (3 g of TMRs in each incubation bottles) was added to the mixed culture solution of stained rumen fluid with artificial saliva (1:1, v/v) and incubated anaerobically for 48 hours at 39℃. The pH in all incubation solutions tended to decrease up to 48h, but the opposite results were found in concentration of total gas production, ammonia-N and total VFA in all incubations.The total gas production (p＜0.05) in LF-TMR was highest compared with those of other diets. Also, concentration of total VFA was tended to increase in LF-TMR compared with other TMR diets in all incubations. The EDDM in both EF-TMR and LF-TMR was tended to high compared with GR-TMR (p=0.100). In this in vitro trials, concentration of propionate in all incubation solution was not affected by increased concentration of TDN. The results of the present in vitro study indicate that TMR may provide more favorable condition for nutrient digestion both in the rumen. |
| Databáze: | OpenAIRE |
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