Annual change of primary productivity in Apostichopus japonicus ponds by three water quality regulations

• SUN Guangwei, 
• ZHOU Wei, 
• DANG Ziqiao, 
• WEI Yanan, 
• LIN Qing, 
• LEI Zhaolin, 
• CHEN Jifeng, 
• GUO Chao, 
• ZHANG Dongsheng