Fertilizer Application
- Natural fertilizer such as cow/chicken manure, green manure and compost and chemical fertilizer can be used to be abundant of natural food and to reduce the supplementary feed.
- Fertilizers promote the growth of phytoplankton and production of natural food.
- 15-20 kg of urea and 7.5-10 kg of TSP per ac can be used for normal primary production.
- TSP must be soaked overnight and at the next morning, 10-11 am, mix urea, water and soaked TSP, and then broadcast them evenly to grow plankton on the surface.
- Since fertilizers, especially TSP, take time to dissolve into water, should avoid direct application without soaking in water.
- Fertilization should be used weekly or biweekly throughout the cultural period so that natural food can be maintained.