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Effects of fulvic acids on goat sperm

  • Yu Xiao (a1), Zhengmu Wu (a2) and Min Wang (a2)


The effects of adding fulvic acids (FAs) to semen extenders on the quality parameters of frozen–thawed goat buck spermatozoa remain undetermined. Buck semen samples collected from six mature goat bucks once a week were diluted with Tris–egg yolk-based extenders. The diluted semen samples were supplemented with FAs (0.2, 0.4 and 0.6%, w/w), cryopreserved, and evaluated for sperm-quality parameters. Addition of FAs to the extender increased progressive motility, acrosome integrity, membrane integrity, and superoxide dismutase and catalase activities and decreased percentage abnormality and sperm malondialdehyde level compared with the control group. However, excessive FA addition (>0.4%, w/w) to semen extenders did not improve the efficiency. The results indicated that FAs could be a promising cryoprotectant for goat buck sperm.


Corresponding author

All correspondence to: Yu Xiao. Reproductive Medical Center, the International Peace Maternity and Child Health Hospital of China Welfare Institute, 910 Hengshan Road, Shanghai, 200030, China. E-mail:


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