Study on the Effect of Exogenous Salicylic Acid on Algae Growth in the Environment Qiuyang Xu, Meixue Shi, Shaohua Wang and Yuchun Qing E3S Web Conf., 165 (2020) 02001 Published online: 01 May 2020 DOI: 10.1051/e3sconf/202016502001