Relieving effect of Artemisia argyi aqueous extract on immune stress in broilers
Artemisia argyi aqueous extract (AAE) is isolated from A. argyi, a Chinese mugwort, which is a traditional herbal medicine. Chinese mugwort contains many kinds of bioactive chemicals such as polysaccharides, flavonoids, essential oil and triterpenoids (Zhang et al., 2013), and some vitro cell culture tests and antibacterial experiments have proved that mugwort possesses many biological activities such as antibacterial, antitumour, antioxidant and immunomodulatory activity (Guan et al., 2006; Lan et al., 2010; Bao et al., 2013; Zhang et al., 2014). In recent years, mugwort has been used as a feed additive to promote blood circulation, enhance the body metabolism and improve feed conversion rate and production performance (Khalaji et al., 2011; Kim et al., 2012). However, it is unclear how mugwort promotes the growth performance of broilers. Based on previous studies, the present experiment was conducted to investigate the effect of AAE on broiler chickens under immune stress, to identify the growth‐promoting mechanism of mugwort.