Abstract:

The technology of Litopenaeus vannamei in higher-altitude culture ponds by off-season healthy aquaculture was studied. In this experiment, the health quality shrimp larvae, microecology preparation and microtubule oxygenation were utilized by the scientific plan and execution of programs which the pathogens and the environment-related factors were monitored by real-time. The results showed that the water temperature, transparency, pH, salinity and dissolved oxygen were kept in 19.5-26.7℃(mean 22.94±0.63℃), 23.2-59.1 cm(mean 37.8±12.0cm), 7.7-8.5(mean 8.1±0.0.2), (30.0-33.5)‰(mean 31.72‰±0.84‰), 4.0-6.0 mg/L(mean 5.13±0.38) mg/L, respectively. The ammoniacal nitrogen, the total number of bacteria and vibrio were controlled within the range of 0.05 to 30 mg/L(mean 0.59±0.09)mg/L, (5.05×104 to 19.23×104) cfu/mL, (mean 10.92±3.45×104) cfu/mL, (0.45×104 to 3.71×104) cfu/mL, (mean 1.14±0.73×104) cfu/mL. The regress equations of the body length and culture days was 0.087d+0.1968(r=0.9843), and the regress equations of the body weight and culture days was W=0.0001d2.3847(r=0.9948). There were only 17.86% of culture ponds (5:28) whose average yield were less than 500 kg/666.67m2.There were 39.29%, 28.75%, 10.71% and 3.57% of the culture ponds whose average yield were in the range of 500-1000 kg/666.67 m2，500 -1000 kg/666.67 m2,1000-1250 kg/666.67 m2, 1250-150kg/666.67 m2 and more than 1500 kg/666.67 m2, respectively. The mean yield, survival rate and feed conversion ratio of the 28 ponds were (769.08±440.22) kg/666.67 m2, (67.84±15.23)% and (1.27±0.83) respectively.