Study on the correlation of supplementation with L-citrulline on the gastrointestinal flora and semen antifreeze performance of ram
IntroductionCryopreservation of semen can give cap sleeve layering tee full play to the reproductive advantages of male animals.However, in actual production, due to the poor frost resistance of sheep semen and the low conception rate, the promotion of sheep frozen semen is greatly hindered.Therefore, it is urgent to improve the frost resistance of