The use of Effective Microorganisms (EM) in shrimp farming is a measure to manage a stable water environment, increase the growth ability of shrimp, and limit the occurrence of some common diseases. EM also makes shrimp molt uniformly and helps treat luminous bacteria disease.
A/ Steps to prepare EM2 to activates microorganisms in farming environment:
Step 1: Prepare the original EM1, which includes inactive microorganisms.
Step 2: Prepare EM2 from the original EM1. Include 3% EM1, 3% molasses, and 47% water without chlorine.
- Stir to dissolve molasses completely in water without chlorine, then pour EM1 solution in an appropriate amount and stir for 30 minutes.
- Pour mixture to plastic can with an airtight lid for anaerobic incubation. After 4-5 days, test the aroma of the solution. When pH levels are 3.5-4, the solution is ready to be used. With EM2 mixture, there should be a white moldy layer on the surface of the solution.
B/ Using EM2 for pond bottom treatment and water color change:
1/ Changing water color:
- After renovating and preparing ponds for farming, pump treated water to ponds and proceed to change water color.
- To change color of water: In 3-5 continuous days, use 30 liters of EM2/hectare each day in combination with organic fertilizer and nutrients.
- After 5-7 days of checking technical information and indicators, prepare to stock shrimp.
2/ Managing water resources:
- To manage water resources and prevent diseases in shrimp: once every 10 days, use additional 50 liters of EM2/hectare until harvest period.
© 2019 Viet Linh
- Using Effective Microorganisms (EM) and garlic to prevent diseases in shrimp
- The functions of probiotics and the use of probiotics in shrimp farming
- Tags: effective microorganisms (EM); bacteria
