What is the best fertilizer for shrimp pond water? Choose organic or inorganic fertilizer according to the actual situation
AbstractGenerally, for muddy and sandy-muddy ponds, using inorganic fertilizer to fertilize the water has a good effect. If it is a sandy-bottom pond, a high-level pond, or a pond covered with plastic film, fertilizing the water will be relatively more difficult, and it is necessary to use a combination of inorganic fertilizer and organic fertilizer to fertilize the water, so that the effect is better.
What is the best fertilizer for shrimp pond water
Shrimp pond water can be fertilized with organic fertilizer, inorganic fertilizer, and some compound beneficial bacteria, etc. But which substances to use specifically for fertilizing the water is best determined according to the bottom soil conditions of the pond.
Generally, for muddy and sandy-muddy ponds, directly using inorganic fertilizer to fertilize the water has the best effect; for sandy-bottom ponds, high-level ponds, and ponds covered with plastic film, fertilizing the water is relatively more difficult, and a combination of inorganic fertilizer and organic fertilizer can be used to fertilize the water, with a relatively good effect.
Precautions for fertilizing shrimp pond water
1. Timing of fertilizing the water
Fertilizing the water is generally carried out about 20 days before releasing the seedlings.
Because during the process of fertilizing the water, many physical and chemical factors in the pond undergo drastic changes, especially changes in pH. In the early stage, the pH in the water will continue to increase, sometimes even reaching 10. Generally after 15 days it will gradually decrease, and after about 20 days the pH in the water will be around 8.4, which is more suitable for the growth of shrimp seedlings; and at this time the water color, transparency, and plankton quantity are all in a relatively good state, making it more suitable to release the seedlings. To ensure that the shrimp seedlings can grow and develop better, fertilizing the water is best carried out about 20 days before releasing the seedlings.
2. Substances for fertilizing the water
Organic fertilizer, inorganic fertilizer, substances such as amino acids, and some compound beneficial bacteria all belong to substances for fertilizing the water. Organic fertilizer generally uses cow dung, pig manure, chicken manure, and tea seed cake, etc.
1. Cow dung, pig manure, chicken manure
Before use, they must be disinfected and fermented; for 1 mu, take about 20 kg of dry cow dung or pig or chicken manure and mix it evenly with about 1/5 quicklime, then soak it thoroughly with water. After 7 days, apply live bacteria, and after another 3 days it can be used. It can be put in hanging bags, stirred evenly at the pond edge or in a fermentation tank, filtered with mesh gauze, mixed with water, and splashed over the whole pond.
2. Tea seed cake
For each mu of shrimp pond, take about 20 kg, mix it evenly with 4 kg of phosphate fertilizer, then soak it in water, and it can be used after 2 days. However, this method cannot be used for ponds with mixed fish culture.
3. Management of fertilizing the water
One of the most important effects of fertilizing pond water is to increase dissolved oxygen and change the water color and transparency. In daily management, if the water color and fertility are found to weaken, supplement the corresponding live bacteria preparations and nutrients into the pond in a timely manner. When the water color changes greatly due to weather or other factors, use bottom soil improvers or other methods to promptly turn the water color back.
When fertilizing the water, pay attention to avoiding a single type of bait organism in the pond. According to the bait needs of shrimp seedlings at different growth stages and the reproduction cycle of the bait, adopt comprehensive cultivation measures to prolong the reproduction time of bait organisms in the shrimp pond and ensure that the shrimp seedlings have sufficient and rich bait organisms to feed on.
When cultivating bait organisms, it is necessary to combine the carrying capacity of the water body and ecological balance; fertilization should follow the principle of small amounts and multiple times. Do not fertilize when the water color is relatively dense, and do not fertilize on cloudy and rainy days. When fertilizing, avoid morning and evening, and it is best to choose to fertilize before noon.