Fertilization of winter lead to dead fish _3818 -

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Fertilization of winter lead to dead fish

Over 00 kg. December 22 to treat. Sick fish and water according to their impact on the results of the inspection. Treatment programs identified by the treatment, the disease was brought under control, are summarized as follows: 1 Basic disease incidence pond pool ll acres, rectangular, east-west, with an average depth of 1.4 meters, a total of 28,000 carp stocking, the incidence Time Specification 400-450 g / tail, raise carp 1500 sets. Onset of specification of 300 to 400 g / tail. The pond at the onset of 10 March l2, when the water was slightly red (inferred that the dominant species of phytoplankton in the water naked dinoflagellates, Euglena blood red), some fish surfaced. Does not appear dead fish. 175 kg ammonium bicarbonate Quanchiposa day. Two hours after a large number of dead fish. L1 since December the 2nd consecutive day changing the water. Changing the water each time O. 4 meters deep,[link widoczny dla zalogowanych], and then added to the original level. After changing the water, a slight improvement in the phenomenon of dead fish. But has not yet been effectively controlled. Remains of dead fish every day from 2 to 5. The next day, the entire pool of spilled 9 kg copper sulfate, the situation has not improved. L2 all in the pool of 17 300 kg of zeolite powder applied. Dead fish still occur. l2 22 water samples for testing, water analysis: pH value of 9. O, nitrite tends to O. Incomplete due to reagents, ammonia and hydrogen sulfide, etc. are not tested. 2 sick fish visual inspection of symptoms: dark colored fish disease, red gill cover, side of the body with erythema, scales a little off. In which a prominent eye: Anatomy: torn skin, lateral muscle spotty and massive congestion and hemorrhage; intestinal nothing, wall purple; microscopy: purple gills, on mucus. And a hemangioma. According to the above symptoms, diagnosis, etiology for the hemorrhage of 3.1 3 feeding large fish in summer and autumn. Waste and more after the winter fall in temperature, water density, the exchange is poor. Ammonia and other harmful gas volume i |. Together in the water, the lower is a major factor in inducing fish diseases. 3.2 mistakenly applied a lot of ammonium bicarbonate,[link widoczny dla zalogowanych], causing the fish ammonia poisoning, caused by dead fish. 3.3 The early onset of sudden drop in temperature due to the water plankton die, resulting in 4 22 l2 treatment withdraw the entire pool of highly active substrate modifier lO kg: 23, 25, were splashed Hong Fung Group III chlorine dioxide 5. After the above treatment. Phenomenon is no longer dead fish. 5 Analysis of the ponds are built on saline land in the secondary, and its pH value is high (pH = 9.O), ammonia toxicity. The spring, summer and autumn of feeding,[link widoczny dla zalogowanych], water in a large number of ammonia and other harmful gases is almost saturated. Fish live in water a long, easy to form a In this case, farmers should take physical or chemical degradation of harmful substances. To reduce water pollution. But because farmers lack the appropriate technical expertise. But instead applied a lot of investment and ammonium bicarbonate. Act as a Many farmers do not know how scientific fertilization. Mistakenly believe that Guided by the idea of this error, part of the fish pond fertilization poorly. Proper application methods should first check the water for the water balance of fertilizer components, determine phosphorus, nitrogen, or fill, or other fields as a nutrient. Not blindly, nothing additional nitrogen fertilizer. A small amount of fertilizer should also be in line with many of the principles. Choose a clear day at noon, the juice of fertilizer (organic fertilizer) or dissolved in a container full of fertilizer in water (inorganic fertilizer),[link widoczny dla zalogowanych], even splashing in the water surface, rather than solid fertilizer can be applied directly in the water withdrawal. Be prohibited, especially fine fish ponds (aquaculture sector by senior Pan Ruxin this article with great interest. I 1 in Regards to thank Received Date ,2006-12-25

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