THE STUDY ON THE MICROENVIRONMENT PHYSICAL-CHEMICAL FACTOR OF SNAIL HABITAT IN ANNING RIVER VALLEY.

Objective:To explore the impacts of the microenvironment physical chemical factors of snail habitat on the snails distribution.Method:The authors analyzed the sample sampled at random in endemic region in Anning River Valley of Xichang by the kits produced by LAMTTE company in America.Results:The soluble salt,Nitrite Nitrogen,Nitrate Nitrogen,and sulfate(in soil) and phosphorus(in water) of snail environment are evidently higher than in non snail environment.Bayes step by step differentiate analysis reveal that eleven factors were related to snails living or not.Conclusion:This study initially reveal the relation between microenvironment physical chemical factors and sails living and provided new theoretical basis for the snails killing.The authors believe that the comparative study between epidemic region and the near non epidemic region will be more representatives.