Fertilization plays a crucial role in fish ponds by stimulating the growth of natural food sources such as plankton, algae, and benthic organisms. When organic fertilizers are added, they promote microbial activity and increase organic debris, which serves as a rich food source for various fish species like tilapia and snails. Additionally, some organic materials can be directly consumed by bottom-feeding fish such as catfish and mussels. In spring, proper fertilization techniques are essential to ensure optimal pond productivity. Here are key considerations:
First, it's important to fully ferment organic fertilizers before applying them. Spring water temperatures are typically low, and oxygen levels are generally high. Using well-fermented organic manure not only reduces costs but also improves fish growth. Fertilizers such as animal dung must be properly decomposed to minimize oxygen depletion in the water, allow quick absorption by phytoplankton, and eliminate harmful pathogens.
Second, follow the principle of "less but even" application. This means applying about 10 to 100 kilograms of organic fertilizer per acre each time, and spreading it evenly across the pond. The goal is to maintain a yellow-brown or oil-green water color, with no visible oil on the surface and a transparency between 20 cm and 30 cm. If the water becomes too clear (over 30 cm), it indicates that the fish are feeding less, and it’s time to re-fertilize.
Third, adjust the amount of fertilizer based on the fish species present. In ponds where fish are fed commercial feed, the amount of fertilizer should be reduced to keep the water clarity between 30 cm and 40 cm. As water temperatures rise, the need for additional nutrients increases. However, in intensive fish farms that already have high populations of species like carp or grass carp, it's best to avoid fertilizing in spring to prevent overloading the system.
Fourth, choose the right time for fertilization. It's best to apply fertilizers during sunny mornings, and always check the weather forecast. Avoid fertilizing on cloudy or rainy days. Phytoplankton thrives through photosynthesis, so applying fertilizers in the morning allows them to grow effectively over the next two to three days. This helps reduce water pollution from organic matter and supports a healthy balance of nutrients in the pond.
Lastly, regularly change the water to maintain its quality. Over time, organic waste and biological byproducts can accumulate, leading to lower oxygen levels and an imbalanced plankton population, which negatively affects fish growth. By replacing a portion of the water regularly, you prevent the pond from becoming overloaded and maintain a "fat, lively, tender, and cool" water environment that supports healthy fish development.
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Vitamins Feed Grade Meal,Water Soluble Vitamin,Vitamin Mineral Water,Poultry Feed Grade Vitamin
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