PENG Hui-hui, LIU Qiang, RONG Xiang-min, ZHANG Yu-ping, TIAN Chang, XIE Yong. 2015: Effects of biochar, organic fertilizer and chemical fertilizer combined application on nutrient utilization and yield of spring maize. Journal of Southern Agriculture, 46(8): 1396-1400. DOI: 10.3969/j:issn.2095-1191.2015.08.1396