Enteric methane production in adult sheep of the Segureña breed fed diets containing alkali-treated olive cake
| Autor: | J. F. Aguilera, E. Molina-Alcaide |
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| Přispěvatelé: | Junta de Andalucía |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Methane production was individually measured, using open-circuit respiration chambers, in Segureña wethers fed diets including two different levels of olive cake (OC) sprayed with soda solutions to attain 0, 5, 7.5 and 10 g NaOH/100 g OC. Increasing level of OC in diet reduced (P < 0.001) CH production (from 3.34 to 2.37 % of total ingested carbon and from 8.97 to 7.90 % of total digestible energy intake), which represent reductions in energy losses of up to 12 % of the digestible energy (DE) intake. Differences (P ≤ 0.001−0.002) in enteric CH production due to treatment of OC with alkali were observed. The average value for the rate of conversion of feed energy to CH energy (Y) was 5.96 kJ/100 kJ GE intake or 8.97 kJ/100 kJ DE for the standard basal diets, containing 100 g OC/kg diet. Increasing OC in the basal diet to achieve 400 g/kg diet resulted in a substantial reduction of enteric CH production promoting a Y value of 4.18 kJ CH/100 kJ GE or 7.90 kJ CH/100 kJ DE intake. A decrease (P = 0.018) in enteric CH production (l/kg DMI) due to the alkali treatment of OC was noticed. Accurate predictions of CH production were obtained by simple regressions equations relating measured values of CH production and diets composition and/or intake. Dry matter intake and structural carbohydrates content in the diet were accurate predicting factors of the enteric CH production. The best correlations were obtained when enteric CH yield (CH, l/kg DMI) was the variable to be estimated. This work was supported by the Junta de Andalucia (Project P12-AGR-587). |
| Databáze: | OpenAIRE |
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