[Methods] To counter the primary carcinogenic,promote,and protective factors identified by epidemiological and etiological investigation of esophageal cancer,five comprehensive countermeasure and means of etiological prevention were carried out and their preventive effects were evaluated in Linzhou city using quasi-experiment method nonequivalent control group,pre-post self-controlled to.

It not only has the effects of bettering the quality of the water ,preventing and curing of fish disease and keeping the balance of nature in fish pond, but reducing the secondary pollution also.

The paper reported the study on the techniques such as Pond facilities for Perch culture in pond, temporary culture of Perch fry, administration of finished culture and fish disease control and treatment.