Study on the efficiency of chemicals and bacteria being used in Penaeus monodon Fabricius grow-out pond
1995
Smarn Kuchi
Application of hydrated lime at the rate of 160 kg/rai, into shrimp pond with normal bottom soil, before filling water, resulted in higher water pH and lower concentration of ammonia within the first week of culturing period, but did not have any effect on either water quality after one week or growth rate and survival rate of shrimp. The use of phosphate fertilizer at the rate of 0.64 kg/rai once a week, resulted in higher amount of phytoplankton and lower concentration of ammonia within the first 8 days, but did not have any effect on either water quality after that period or survival rate and growth rate of shrimp. Application of zeolite at the rate of 20 kg/rai every 15 days, resulted in the decrease of ammonia concentration in water within the first 8 days, but there was no significant decrease of ammonia concentration after that period. The use of zeolite also had no effect on survival rate and growth rate of shrimp. The use of 2 kinds of commercial bacteria in P. monodon culturing system did not have any effect on water quality, growth rate and survival rate of shrimp.
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