XIONG Jun, LI Wei-liu, PAN Wen-xing, WEI Min-zheng, TANG Xiu-hua, YAN Hai-feng, QIN Yong, ZHENG Gang-hui, CHEN Bi-mei, LIU Yong-xian. 2019: Effects of exogenous selenium application on selenium content and yield of purple sweet potato under different soil conditions. Journal of Southern Agriculture, 50(6): 1211-1218. DOI: 10.3969/j.issn.2095-1191.2019.06.08