Scientific fertilization techniques not only help conserve resources more efficiently but also enhance fertilizer utilization and prevent incidents in aquaculture. Therefore, it's essential to master the following key principles of fertilization.
1. **Assess Water Quality Before Fertilizing**
Before applying any fertilizer, evaluate the pond’s condition—whether it's "fat," "medium," or "thin." This is typically done using water samples, oil film observations, or chemical tests. If the pond is already rich in nutrients, no immediate fertilization may be needed. If it's too nutrient-rich, take steps to control dominant species. If it's thin, apply fertilizer according to the water quality, soil composition, and environmental conditions.
2. **Adjust Fertilizer Amount Based on Pond Conditions**
The amount of fertilizer applied should depend on the soil structure, pond characteristics, water clarity, depth, and farming practices. Each pond is unique, so a one-size-fits-all approach doesn't work.
3. **Fertilize at the Right Time**
Follow the principle of “small amounts, frequent applications†to maximize efficiency and avoid waste. When the water temperature reaches 15°C, apply base fertilizer and ensure it’s fully dissolved. Between 20–30°C, phytoplankton and zooplankton thrive, requiring more nutrients. Apply fertilizers on sunny days for best results.
4. **Determine Fertilization Frequency**
The frequency of application depends on the type of fertilizer, the species being farmed, pond conditions, and water color. Typically, fertilize every 7–10 days when temperatures are between 20–25°C, and every 4–5 days when temperatures rise to 25–30°C.
5. **Proper Fertilizer Application Method**
When using "Tianchen Fishery Fertilizer," dissolve it in a container with water for 5–10 minutes before applying. Avoid applying during rainy days. When mixing nitrogen and phosphate fertilizers, always apply phosphate first, then nitrogen. Never reverse the order, as this can create harmful compounds like metaphosphoric acid, which can harm aquatic life.
6. **Use Organic and Inorganic Fertilizers Correctly**
Organic and inorganic fertilizers can sometimes be used together, such as superphosphate with organic matter. However, avoid mixing acidic and alkaline fertilizers, as they can produce gas, precipitate, or toxic substances like NH3, H2S, or HPO3. "Tianchen Fishery Fertilizer" can be used alone or with carbon and ammonia, but urea should be applied separately.
7. **Ten Key Taboos of Fertilization**
- **Avoid Fertilizing During Rain**: Rain reduces light, lowers plankton activity, increases organic load, dilutes fertilizer, and leads to loss.
- **Avoid Fertilizing in Hot Weather**: High temperatures lower dissolved oxygen, increasing the risk of fish suffocation.
- **Avoid Fertilizing in Turbid Water**: Excessive clay particles can adsorb fertilizer, reducing its effectiveness.
- **Avoid Using Only Chemical Fertilizers**: A balanced N:P:K ratio of 4:4:2 is ideal. Single fertilizers may limit growth.
- **Avoid Blind Mixing**: Some fertilizers react poorly, causing gas release or toxicity. Wait 3–5 days before applying other products.
- **Avoid Fertilizing in High Temperatures**: Ideal temperatures are 22–30°C. Avoid fertilizing when it exceeds 30°C.
- **Avoid Dry Application of Solid Fertilizers**: Solid fertilizers sink quickly and get trapped in sludge. Always dissolve them before use.
- **Avoid Fertilizing When Animals Are Not Eating Well or Sick**: This can lead to algal blooms and weaken fish immunity.
- **Avoid Over-Fertilizing**: Excess nitrogen can cause ammonia buildup, while too much organic fertilizer increases oxygen demand.
- **Avoid Draining Surface Water After Fertilizing**: Plankton needs time to grow. Only drain bottom water if necessary.
Mastering scientific fertilization ensures that the water becomes "fatty" with abundant, easily digestible plankton, while maintaining sufficient dissolved oxygen for aquatic life. Following these ten rules will greatly improve the success of your aquaculture efforts.
Laboratory Plastic Consumables
Laboratory Plastic Consumables,Disposable Plastic Test Tubes,Test Tube Racks Ps Material,Cylindrical Bottom Plastic Test Tubes
Yancheng Rongtai Labware Co.,Ltd , https://www.rongtailab.com