Abstract:This study comparatively analyzed the superovulation effect of Alxa white cashmere goats under grazing and indoor feeding modes. The experimental data indicated that the superovulation performance of goats in the indoor feeding mode was significantly better than that in the grazing mode. The indoor feeding group showed marked advantages in terms of average follicle-stimulating hormone (FSH) dose (150-160 IU), average estrus duration (12h after progestin withdrawal), average number of flushed embryos (12.56 per goat), average number of usable embryos (11.31 per goat), and the proportion of unusable embryos (10%), all with statistical significance (P<0.05). In contrast, the grazing group had an average FSH dose of 138-142 IU, and although their average estrus duration was shorter (4-5h after progestin withdrawal), they had lower average numbers of flushed embryos (8.56 per goat) and usable embryos (7.81 per goat), accompanied by a higher proportion of unusable embryos (16%) (P<0.05). It is worth noting that under indoor feeding conditions, the goats exhibited lower standard deviations (SD) in the number of flushed embryos (1.5) and the number of usable embryos (1.3), suggesting a smaller variability in these metrics among individuals. This contributes to the enhancement of the overall quality of embryos and the success rate of embryo transfer. In summary, the indoor feeding condition, through the creation of a stable feeding environment and refined management strategies, effectively enhances the superovulation performance of Alxa white cashmere goats, demonstrating significant advantages compared to the grazing mode. These findings not only provide important support for the sustainable development of the cashmere goat industry, but also serve as a scientific reference for future improvements in feeding management and breeding techniques.
