It happens in two major ways. Farmers use fertilizers to increase crop growth. Beneficial bacteria out-compete algae for available nutrients thus eliminating the aggressive blooms that can cause dissolved oxygen sags. This also applies to for life in water and thus to your pond. Farmers use fertilizers to increase crop growth. Turning over the water is the best way to increase oxygen in your pond. When it rains, excess fertilizer and waste can run off into nearby ponds and streams. If drop waterhyacinth, duckweed or water spinach to make shelter when it's sunny, them gather together in a corner of the pond, do not drop more than 1/3 of the pond surface. Many farms also produce large amounts of animal waste. It is generally accepted that the minimum daily dissolved oxygen concentration in pond culture systems is of greatest concern. Algaecides reduce oxygen content as they kill off algae and create organic waste. Overcome the lack of oxygen in the pond: - Pond needs aeration. A lack of dissolved oxygen is the most common cause of fish kills in ponds. The hotter the water the less oxygen it can hold, therefore cold water holds much more oxygen. Many farms also … As the algae and other water plants grow they will consume the dissolved oxygen presence in the water of the pond and make oxygen depletion/ reduction in the pond. Draw conclusions: Based on your data, how do farms affect oxygen levels in the pond? A DO reading of 7 mg/L is desirable, and any reading above that should be considered excellent. Draw conclusions: Based on your data, how do farms affect oxygen levels in the pond? The temperature of your pond water has a profound effect on the amount of dissolved oxygen available in the pond. Many farms also produce large amounts of animal waste. Farmers use fertilizers to increase crop growth. Dissolved oxygen levels below about 6 mg/L can begin to have detrimental effects on pond life. The common error, however, is to rely on more oxygenating plants as these only have some effect. Oxygen content of pond water. In sequence of importance they include: Through the water surface by diffusion. Artificial control of the oxygen budget of water of fish ponds in this case means technical and practical measures which have direct effect on the dissolved oxygen content of the pond water. 11. Explanation: The presence of farm means cultivation of rice, sugar, wheat, sugar canes, Flowers, Vegetables etc. Fish load is not the only consideration. The more farms the less the oxygen concentration levels. This process is called Eutrophication. There are many factors that affect the DO concentration in fish retailing tanks. This will reduce the concentration of dissolved oxygen. Dissolved-oxygen levels can be high during most of a 24-hour period, but the response of culture species appears to be affected primarily by the lowest dissolved oxygen concentration during the night. Draw conclusions: Based on your data, how do farms affect oxygen levels in the pond? By eliminating stratification and reducing the chances of dense algae and phytoplankton blooms, a pond owner can keep dissolved oxygen levels high and eliminate the stressors to the fish populations. Dissolved oxygen is reduced by the biological decay of organic material such as decaying plants and animals or animal and human wastes. When it rains, excess fertilizer and waste can run off into nearby ponds and streams. Oxygenation of pond is quite interesting. Pond water is provided with oxygen through a certain number of sources. Rectifying a lack of oxygen is simple enough. - Do not feed and fertilize with excess doses. Salinity, water temperature and atmospheric temperatures also affect dissolved oxygen. Using a small bubbler, air pump or aerator adds enough oxygen for most size ponds in the winter. Figure 11. Without oxygen life on earth in its present form would not be possible. Oxygen content of the pond water can be influenced by two methods; by change of flow rate, and by aeration of pond water. Plants and algae do photosynthesis during the day and wind adds oxygen at night. The nutrients in these substances can … The oxygen plants produce is released into the pond water and maintains high levels of oxygen in the pond.