Abstract: By supplementing natural saline-alkali water into desalinated prawncultivating pond,this paper studied the survival ability of Litopenaeus vannamei under saline-alkali water environment.The results showed that the survival duration of untamed juvenile shrimp was more than 96 hours at the alkalinity of saline-alkali water from 5.15 to 19.24 mmol·L^-1,and less than 0.75 hours at the alkalinity from 23.41 to 38.78 mmol·L^-1.The survival duration of tamed juvenile shrimp was more than 24 hours at the alkalinity from 5.15 to 38.78 mmol·L^-1.The upper limit of alkalinity adapted by untamed juvenile shrimp was about 10 mmol·L^-1,and the adaptability to the increasing disparity in alkalinity was under 8 mmol·L^-1.The adaptability of juvenile shrimp could be increased by the increase of tamed standard,and that of tamed juvenile shrimp to the alkalinity of 30 mmol·L^-1 was from 2 to 4 mmol·L^-1 and from 3 to 25 mmol·L^-1 for the alkalinity disparity increase and decrease,respectively.Litopenaeus vannamei could be cultivated in the saline-alkali water with an alkalinity of 32 mmol·L^-1 in west Jilin Province.

Key words: Castanopsis kawakamii, New self adaptive model, Genetic algorithm