1. Sunflower Oil and Nannochloropsis oculata Microalgae as Sources of Unsaturated Fatty Acids for Mitigation of Methane Production and Enhancing Diets’ Nutritive Value
- Author
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Ahmed E. Kholif, Hamza A. El-Alamy, A. M. Kholif, Reda Salama, Olurotimi A. Olafadehan, and Ali S. Gomaa
- Subjects
0301 basic medicine ,Rumen ,food.ingredient ,Population ,Forage ,03 medical and health sciences ,Ammonia ,chemistry.chemical_compound ,Nutrient ,food ,Microalgae ,Animals ,Sunflower Oil ,Dry matter ,Fiber ,Food science ,education ,Silage ,education.field_of_study ,Sunflower oil ,0402 animal and dairy science ,04 agricultural and veterinary sciences ,General Chemistry ,Animal Feed ,040201 dairy & animal science ,Neutral Detergent Fiber ,030104 developmental biology ,chemistry ,Fermentation ,Fatty Acids, Unsaturated ,Cattle ,Digestion ,General Agricultural and Biological Sciences ,Methane ,Nutritive Value ,Stramenopiles ,Medicago sativa - Abstract
The objective of this assay was to investigate the effect of adding sunflower oil, Nannochloropsis oculata microalgae and their mixture at 0, 1, 2, 3, 4, and 5% to three total mixed rations (TMRs) with different concentrate:forage ratios (40C:60F, 50C:50F, and 60C:40F) on in vitro gas production (GP), methane (CH4) production, and nutrient degradability. Asymptotic GP, GP rate, CH4 concentration/g acid detergent fiber (ADF), dry matter (DM) degradability (DMD), short chain fatty acids (SCFAs), and ruminal bacteria population increased, but neutral detergent fiber (NDF) degradability (NDFD), ADF degradability (ADFD), and protozoa count decreased with increasing concentrate level in the TMR. Methane production/g DM and NDF was higher for 50C:50F TMR. Sunflower oil reduced asymptotic GP, lag time, CH4 production/g ADF, ammonia–N (NH3–N), and SCFA. Compared to the control treatments, additives decreased GP rate, while sunflower oil/N. oculata mixture increased DMD and NDFD. All additives at 5% increased GP ra...
- Published
- 2018
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