2006年7月中旬,山东水库一养殖户向笔者反映其网箱养殖的草鱼不肯上台摄食,且有部分死亡现象,每天三四条左右,已持续三天。接到反映后笔者即前往现场。该水库养殖面积大,网箱养殖密集,大部分以草鱼为主。对现场水质测定及鱼体检查后,发现以下情况:①水质基本良好,氨氮、亚硝酸 In mid-July 2006, a farmer in a reservoir in Shandong Province reported to his author that the grass carp farmed in his cage would not come to power on the stage and had some deaths. About three or four days a day have lasted for three days. After receiving the response, the author went to the scene. The reservoir area of ​​?? large-scale aquaculture, cage culture intensive, mostly grass-based fish. On-site water quality and fish inspection, found the following: ① water quality is basically good, ammonia, nitrite