The winter solstice has passed, the temperature is lower, and the surface of the pond seems to have ushered in its "quiet period."
However, for aquaculturists, this does not mean that they can relax their vigilance, as winter is a critical time for replenishing water.
What is fatty water?
Fertilizer water is to increase the nutrient content in the water body by adding fertilizer and nutrients, promote the growth of algae and microorganisms, achieve the balance of bacteria and algae in the water body, improve the self-purification ability and productivity of the water body, and provide a suitable growth environment for aquatic organisms.
Why do we need winter fertilizer?
First of all, the system stability of the pond in winter is poor, and the fertilizer water can provide sufficient dissolved oxygen to the water body, which helps to maintain the ecological balance of the water body. By supplementing nutrients and promoting the growth of beneficial algae, the propagation of harmful algae and pathogens can be effectively inhibited and the occurrence of diseases can be reduced.
Secondly, fertilizing water can improve the self-purification ability of water body. In winter, the water temperature is low, and the self-purification ability of water body is weakened, which easily leads to the deterioration of water quality. Through fertilizer and water management, it can accelerate the decomposition of organic matter, reduce harmful substances in the water body, and keep the water quality clean.
Finally, winter fertilizer water can also provide a necessary source of nutrients for aquatic life. Although the growth rate of aquatic organisms slows down in winter, they still need to ingest nutrients to maintain life activities. Through fertilizer and water management, they can be provided with abundant natural food and promote healthy growth.
What are the reasons why water and fertilizer do not rise?
Winter fertilizer and water often face challenges, the main reasons for water and fertilizer are as follows:
Single fertilizer use: Single fertilizer such as superphosphate, fertilizer dissolution fast but volatilization is also fast, most of the precipitation in the bottom, can not be effectively absorbed by the water body.
Moss competition nutrition: Moss at low temperature has a natural reproductive advantage, and diatoms compete for nutrition, resulting in water is difficult to fertilize.
Low water temperature: Low water temperature leads to slow metabolism of algae and decreased growth rate.
Lack of algae species: Lack of the necessary algae species to form an effective algae community.
Toxins in water: toxins such as drug residues and heavy metals can inhibit the growth of algae and microorganisms.
How to fertilize water correctly?
To solve the problem of low temperature fertilizer and water in winter, we can take the following measures:
A variety of fertilizers: the use of a variety of fertilizers with fertilizer water, such as amino acid fertilizer paste, phosphate fertilizer, etc., balanced water supplement nutrition.
Use of bacterial fertilizer: winter fertilizer must use bacterial fertilizer, such as bacillus or EM bacteria, to promote the rapid degradation of organic matter.
Determine the indicators to see whether it is suitable for cultivating algae: it is recommended that the pH be stable between 7.0 and 8.5; The dissolved oxygen is preferably between 8mg/L and 12mg/L; Ammonia nitrogen is not less than 0.2mg/L and nitrite is not more than 0.1mg/L.
Adding algae: due to the low temperature and less algae, it is not possible to reach the amount of fertilizer and water needed, and it is generally necessary to add algae, and the specific method is 6 mu of diatom bloom.
Appropriate use of phosphate fertilizer: In the case of not much moss, the appropriate use of phosphate fertilizer can quickly fertilize water.
A small number of times: follow the principle of a small number of times, 7 days or so to supplement once, to avoid a large amount of fertilizer at one time.
Avoid the use of high-nitrogen fertilizer: Ammonia nitrogen content in winter water is usually high, avoid the use of fertilizer with high nitrogen content to prevent ammonia nitrogen and nitrite exceeding the standard.
In short, low temperature fertilizer and water in winter is a comprehensive work, which requires farmers to fully consider water temperature, light, fertilizer selection and other factors to develop a reasonable fertilizer and water program.