Effects of planting density or proportion on water quality and bacterial microbiota in the tilapia and Houttuynia cordata aquaponics

• KE Xiaoli, 
• LI Qingyong, 
• HUANG Qiubiao, 
• WANG Miao, 
• YI Mengmeng, 
• LIU Zhigang, 
• LU Maixin