Freshwater Fish Pond Fertilization Precautions in Spring
The role of fertilization in fish ponds is mainly the reproduction of plankton, epiphytic algae, zoobenthos, and other natural foods, providing abundant food resources for eel, oyster and other farmed fish. Fish pond fertilization in spring should pay attention to the following matters: Organic fertilizers must be fully fermented. The temperature of fish ponds in spring is low, and the water is rich in oxygen. Reasonable application of organic fertilizers not only has low cost, but also can achieve good breeding results. The use of organic fertilizers such as large excrement and livestock manure in fish ponds must be fully fermented, because fertilizers that have been fermented and decomposed and organic matter is fully decomposed and applied to fish ponds can reduce oxygen consumption in the water and can be quickly absorbed and utilized by phytoplankton. It also kills pathogens in organic fertilizers. Less application, uniform application, and so on, so-called less application, that is, each application of tens of kilograms of organic fertilizer per acre to 100 kilograms; the so-called uniform application, that is, the whole pond with water and manure spatter evenly, so that the fish pond color is yellow brown or oil Green, oil-free water surface, transparency is maintained at 20 cm ~ 30 cm; the so-called diligence, that is, with the fish feeding, whenever the pond water is reduced, the transparency of more than 30 cm immediately when the fertilization. Due to the fish system, it should be determined that the amount of fertilization is not the fish pond of the main eel and eel. Since the feed is fed, the amount of fertilization in spring needs to be reduced accordingly, so that the transparency is maintained at 30 cm to 40 cm. With the increase in temperature, the pond water fertility will increase. getting bigger. Intensive breeding of fish and ponds with high yields of carp and grass carp are not suitable for fertilizing even if they are mixed with some carp and carp. Fertilization time is good for sunny mornings. Listen to (watch) the weather forecast. Do not fertilize on cloudy or rainy days. Phytoplankton grows through photosynthesis and fertilizes in the sunny morning of 2~3 days in a row, which can promote the proliferation of microorganisms at the fastest and best level, minimize the pollution of organic fertilizers on water quality, and ensure the benign circulation of fish and pond materials. . Changing the water regularly to keep the water fresh If the accumulation of metabolic wastes of organic matter and various types of organisms in fish ponds is excessive, the oxygen content in water decreases, and plankton composition is poor, the growth of farmed fish will be affected. Therefore, it is necessary to change the new water regularly so as not to overload the fish ponds and keep the water quality “fat, live, tender and coolâ€. Anaesthetics Laryngoscope,Laryngoscopy Anesthesia,Portable Video Laryngoscope ,Beam Illuminated Laryngoscope Jiangsu Yongle Medical Technology Co., Ltd. , https://www.jsylmedical.com