What is the best way to use fertilizer and water in shrimp ponds? Choose organic fertilizer and inorganic fertilizer according to the actual situation

In general muddy and sandy ponds, fertilizing and watering with inorganic fertilizer has a good effect, but if it is sandy bottom, high pond and ponds covered with plastic film, it will be relatively difficult to fertilize and water, so it is necessary to use the combination of inorganic fertilizer and organic fertilizer to fertilize and water.

What is the best way to use fertilizer and water in shrimp ponds

Organic fertilizer, inorganic fertilizer and some compound beneficial bacteria can be used for fertilizer and water in shrimp ponds. But the specific use of which substances for fertilizer and water, it is best to decide according to the bottom quality of the pond.

In general argillaceous and sandy ponds, the effect of directly using inorganic fertilizer for fertilizer and water is the best; the fertilizer and water of sandy bottom, high pond and ponds covered with plastic film are relatively difficult, and the effect is better with the combination of inorganic fertilizer and organic fertilizer.

Matters needing attention for fertilizer and water in shrimp ponds

First, fertilizer and water time

Fertilizer and water are generally carried out about 20 days before seedling release.

Because in the process of fertilizer and water, there are many physical and chemical factors in the pond changing dramatically, especially the change of PH value, the PH value in the early water will always increase, sometimes it can even reach 10, generally, it will decrease gradually after 15 days, and the PH value in the water will be about 8.4 in 20 days, which is more suitable for the growth of shrimp seedlings. And at this time, the water color, transparency and the number of plankton are in a good state, the release of seedlings is more appropriate, in order to ensure better growth and development of shrimp seedlings, fertilizer and water should be carried out about 20 days before release.

II. Fertilizer and water substances

Organic fertilizer, inorganic fertilizer, amino acid and other substances and some compound beneficial bacteria all belong to fertilizer and water substances. Organic fertilizer generally uses cow manure, pig manure, chicken manure and tea seed cake and so on.

1. Cow dung, pig manure and chicken manure

Before use, it should be sterilized and fermented; 1 mu of cow manure or pig and chicken manure dried by 20kg and 1 mu of quicklime should be mixed evenly, then poured thoroughly with water, and live bacteria should be released after 7 days, and then can be used in 3 days. It can be packed in a hanging bag, stirred well by the edge of the pool or in the fermentation pool, filtered with gauze and sprinkled with water throughout the pool.

2. Tea seed cake

Take about 20kg per mu of shrimp pond, mix it with 4kg phosphate fertilizer, soak it in water, and use it after 2 days. However, this method cannot be used in mixed fish ponds.

III. Fertilizer and water management

One of the most important functions of fertilizing and watering the pond is to increase dissolved oxygen and change the color and transparency of the water. In the daily management, if the water color and fertility are found to be weakened, the corresponding living bacteria preparation and fertilizer should be added to the pond in time. When the water color changes greatly due to weather or other factors, the color of the water should be changed in time with a substrate improver or some other methods.

In order to prolong the breeding time of food organisms in shrimp ponds, we should pay attention to avoid single food organisms in the pond, and take comprehensive culture measures according to the food demand of shrimp seedlings at different growth stages and the breeding cycle of food, so as to ensure that shrimp seedlings have sufficient and abundant food organisms to eat.

When cultivating bait organisms, it should be carried out in combination with the load capacity and ecological balance of the water body; fertilization should be carried out in accordance with the principle of a small number of times, no fertilization should be applied when the water color is thick, no fertilization should be applied in cloudy and rainy days, and morning and evening should be avoided when fertilizing. it is best to apply fertilizer before noon.