Effects of replacing extruded maize by dried citrus pulp in a mixed diet on ruminal fermentation, methane production, and microbial populations in rusitec fermenters
| Autor: | Iván Mateos, María Dolores Carro, Jairo García-Rodríguez, Cristina Saro, María José Ranilla, Jesús Salvador González |
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| Přispěvatelé: | Ministerio de Ciencia, Innovación y Universidades (España), Universidad de León |
| Rok vydání: | 2020 |
| Předmět: |
Microbial protein synthesis
Butyrate Bacterial growth engineering.material Article Rumen stomatognathic system lcsh:Zoology Food science lcsh:QL1-991 Incubation Extruded maize chemistry.chemical_classification lcsh:Veterinary medicine General Veterinary biology Pulp (paper) food and beverages biology.organism_classification Rusitec stomatognathic diseases qPCR chemistry ARISA Propionate engineering lcsh:SF600-1100 Citrus pulp Animal Science and Zoology Fermentation Methane Bacteria |
| Zdroj: | Animals : an Open Access Journal from MDPI Animals, Vol 10, Iss 1316, p 1316 (2020) Digital.CSIC. Repositorio Institucional del CSIC instname Animals Volume 10 Issue 8 |
| Popis: | Citrus pulp is a highly abundant by-product of the citrus industry. The aim of this study was to assess the effects of replacing extruded maize (EM 20% of total diet) by dried citrus pulp (DCP 20%) in a mixed diet on rumen fermentation and microbial populations in Rusitec fermenters. The two diets contained 50% alfalfa hay and 50% concentrate, and the same protein level. Four Rusitec fermenters were used in a cross-over design with two 13-d incubation runs. After 7-d of diet adaptation, diet disappearance, fermentation parameters, microbial growth, and microbial populations were assessed. Fermenters receiving the DCP showed greater pH values and fiber disappearance (p < 0.001) and lower methane production (p = 0.03) than those fed EM. Replacing EM by DCP caused an increase in the proportions of propionate and butyrate (p < 0.001) and a decrease in acetate (p = 0.04). Microbial growth, bacterial diversity, and the quantity of bacteria and protozoa DNA were not affected by the diet, but the relative abundances of fungi and archaea were greater (p < 0.03) in solid and liquid phases of DCP fermenters, respectively. Results indicate that DCP can substitute EM, promoting a more efficient ruminal fermentation. |
| Databáze: | OpenAIRE |
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