In situ degradation of sunflower (Helianthus annuus) seed and oil
DOI:
https://doi.org/10.19136/era.a12n3.4082Keywords:
fermentation, feeding, sheep, fats, bacteriaAbstract
The aim of this study was to evaluate the effect of including sunflower oil (2 and 4%) and whole sunflower seed (18%) on the in-situ degradability of dry matter (ISDMD), neutral detergent fiber (ISNDFD), acid detergent fiber (ISADFD), and ruminal pH in sheep. A repeated 4 × 4 Latin square design was used, involving four rumen-cannulated male sheep (60 ± 3 kg BW). Data were analyzed using the GLM procedure in SAS, and treatment means were compared with Tukey’s test (p ≤ 0.05). No significant differences in ISDMD were observed among treatments during the first 48 h of incubation; however, at 72 h, the diet containing 4% sunflower oil (T4) showed the highest degradability (p < 0.05). The ISNDFD was significantly higher (p < 0.05) with the inclusion of 4% oil (T4), with increases of up to 36.5% compared to the control. In contrast, ISADFD was lower (p < 0.05) in the diet containing sunflower seed (T2) throughout the evaluation period. Ruminal pH remained within physiological ranges and did not differ among treatments or incubation times (p > 0.05). In conclusion, both sunflower seed and oil modified the degradation of fibrous components, with the 4% oil inclusion emerging as the most efficient strategy to enhance digestibility without compromising ruminal stability.
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