Influence of Environmental Factors on Fertilization
The amount of natural food organisms in the water body is affected and restricted by the physical, chemical and biological factors of the water body. Fertilization is one of the factors. Moreover, the effect of fertilization itself is affected by environmental factors. In order to achieve the desired effect of fertilization, the following aspects must be fully considered and rationally used.
1. Water temperature The water temperature directly affects the degree of metabolism of aquatic organisms, thereby affecting their absorption and utilization of fertilizers. The water temperature is higher, the vitality of aquatic organisms is stronger, metabolism is more vigorous, and the absorption and utilization of fertilizers is also stronger, and vice versa.
Experiments have shown that the strength of the decomposition of organic components of "Tianchen Fishery Fertilizer" by bacteria also varies according to the change in water temperature. Higher water temperature, strong decomposition, fertilizer effect faster.
After fertilization, the peak time of plankton also varies with the water temperature and weather conditions. For example, when the water temperature is about 22°C and the weather is clear, after about 2 to 3 days of appropriate fertilization, the water color can meet the fertilizer and water standards; if it encounters rainy weather after fertilization, due to the decrease of temperature and lack of illumination, the decomposition of organic components and the reproduction of plankton are slow. , Sometimes 5 to 6 days later, the water quality does not turn fat, at this time do not rashly sure that the fertilization is insufficient and a large number of applied top dressing, wait until the weather is clear after 1 to 2 days depending on the situation and then decide whether to apply fertilizer.
2. pH (pH)
Fertilization in neutral and weak alkaline waters produces the greatest effect, with plankton breeding fastest and in the largest number.
If there is too much silt in the bottom of the pool, the pool water is extremely polluted, the soil and pool water are acidic, the life activities of the microorganisms are deteriorated, and the process of inorganicization of organic matter is greatly slowed down. This kind of water body fertilization is not effective. At this point, on the one hand, too much silt can be excavated to remove humus; on the other hand, lime water can be used to adjust to alkalinity, and then other fertilizers can be fertilized after they disappear.
3. Dissolved oxygen (DO)
Fertilization and dissolved oxygen are a contradictory unity. Fertilization is insufficient and water quality is relatively thin. Although the oxygen content is high, the natural food of aquatic animals is insufficient. Excessive fertilization can easily pollute the water quality, resulting in lack of dissolved oxygen in the water. Therefore, we must grasp the appropriate amount of fertilizer, not only to make the water more fat, more natural food, but also to make the dissolved oxygen in the water not too low and affect the survival and growth of aquatic animals.
Applying organic fertilizers, especially organic fertilizers that have not been fermented and fermented, will consume a large amount of dissolved oxygen when decomposed in water. If the fertilization is too much, it will easily lead to lack of oxygen, leading to serious floating heads or even flooding ponds. Therefore, the organic fertilizer needs to be decomposed and fermented beforehand to decompose it into simple organic matter and inorganic salts before it is applied, which can reduce the oxygen consumption after fertilization, and its fertilizer efficiency is also relatively stable, which is the advantage of applying organic fertilizer. Applying inorganic fertilizer, because it does not undergo organic matter decomposition process and phytoplankton blooms rapidly after fertilization, its photosynthesis can absorb carbon dioxide and release oxygen, thereby increasing dissolved oxygen in water. This is an advantage of inorganic fertilizer. However, after a long period of time, the water quality of inorganic fertilizers tends to become "old", which is extremely detrimental to aquatic animals and their bait organisms.
In addition, the dissolved oxygen is sufficient to create favorable living conditions for beneficial aerobic bacteria such as nitrogen-fixing bacteria, cellulose-decomposing bacteria and nitrifying bacteria, and to improve fertilizer efficiency. In addition, the dissolved oxygen is high, and aquatic animals are ingested and have a strong metabolism, and they grow faster and can obtain high yields.
If the dissolved oxygen is insufficient, harmful anaerobic bacteria in the water will be generated in large quantities, and organic substances will produce various organic acids, hydrogen sulfide, ammonia nitrogen and other harmful substances under the decomposition of anaerobic bacteria. At the same time, denitrifying bacteria reduce nitrates to nitrogen and lose their nutrient effect, resulting in a decrease in pond productivity.
Application of "Tianchen fishing fat" can basically solve the above problems. Because “Tianchen Fishery Fertilizer†has the function of fertilizer and water that traditional agricultural fertilizers and inorganic fertilizers have, it can also effectively improve the dissolved oxygen in the water and improve the water quality. It can keep the water body “fertile, live, tender, and cool†for a long time.
4. Soils and sediments There are differences in the physical structure, chemical composition, acidity and alkalinity, and the ability to absorb fertilizers in different soils. These factors must be considered when deciding on fertilization. First, the pond soil must have good water retention to ensure the pond's water level and fatness. Second, the soil contains various inorganic substances that have a great influence on the pool water. Once again, the soil contains a certain amount of organic matter, which is converted into simple organic matter and inorganic salts by bacteria and released into the water to help the pool water become fat. In addition, the soil contains a special organic matter, humus, which not only provides nutrients to the water, but also binds inorganic minerals, especially some nutrients, to the water with inorganic mineral colloids in the soil. It has a very important role.
In short, before the fertilization, the physical and chemical conditions in the pool should be understood in detail. The improvement of inappropriate pond conditions, reasonable increase of pH, and increase of dissolved oxygen are effective measures to improve fertilizer efficiency.
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