When will the most economical method of fertilizing and watering shrimp ponds be implemented?

Fertilization and watering time: the fertilization and watering time is about 20 days before seedling emergence. Fertilization method: -muddy and sandy ponds, the use of inorganic fertilizer effect is better, and sandy bottom, high pool, spread plastic film pond fertilizer is difficult, can use inorganic fertilizer and organic fertilizer combined method, the effect is better; At the same time, the whole water body needs disinfection, 2-3 days after disinfection, 80 mesh can be used to filter the water, to avoid fish and shrimp larvae, or eggs and large zooplankton into the pond.

1. Fertility time

1. Fertilization and water time is about 20 days before seedling release. Due to the drastic changes of many physical and chemical factors in the pond during the fertilization and water process, the obvious one is the change of pH value, which presents the law of "$>" change. The pH value in the early stage continues to increase, sometimes reaching 10.

2. After 15 days, it will gradually decrease, and the pH value can be about 8.5 in about 20 days, which is more suitable for shrimp growth. At the same time, the water color, transparency and plankton quantity are in a relatively good state, which is more suitable for seedling, so the fertilizer and water time is suitable for about 20 days before seedling.

II. Fertilizer and water method

1, the specific use of which substances for fertilizer, need to be determined according to the pond bottom quality conditions, -mud and sand mud pond, the use of inorganic fertilizer effect is better, and sandy bottom, high pool, spread film pond fertilizer when some difficult, can use inorganic fertilizer and organic fertilizer combined method, the effect is better.

2. Most shrimp farmers report that after fertilization in shrimp pond, some water and fertilizer do not rise. If they are fertilized, they will quickly become clear again. It is difficult to cultivate algae repeatedly. It is understood that many shrimp farmers prevent shrimp diseases and adopt the whole water disinfection method. The water body of the culture water is disinfected with the depth of the water body.

Generally, the poison pond and water body are disinfected by filling the water, and the enemy organisms and various pathogens will be killed, but all kinds of beneficial organisms in the pond, including various zooplankton and plants, will also be killed. After these organisms are killed, the water body will become transparent and clear.

4, so in such a water environment, there is no algae species, which is the reason why the water is difficult to fertilize after fertilization, this kind of water because of the small number of algae species, even if a certain color and transparency are cultivated, it cannot last for a long time, so the color is repeated, it is difficult to fertilize the water, and the correct poison pond method is about 10cm of water, generally just submerged bottom surface, this kind of water can not only kill bacteria and viruses at the bottom of the pool, but also kill enemy organisms, and save costs.

5, in the poison pond 2-3 days after the use of 80 mesh filter water, to avoid fish and shrimp larvae, or eggs and large zooplankton into the pond, then into the water will bring a lot of plankton, that is, plankton and phytoplankton, these phytoplankton in the fertilization, will absorb nutrients, wait 24-48 hours, can cultivate a good color and transparency.

6, phytoplankton rapid reproduction, can provide feed for zooplankton, promote rapid reproduction, easy to form a good ecological environment, then just stocking shrimp seedlings, in a good environment can grow healthily.