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New changes to the 2019 fishing moratorium policy, with rewards during the moratorium period to protect the recovery of marine resources
To encourage fishermen to observe the fishing moratorium in port during a certain period, the Fisheries Agency originally established the "Voluntary Fishing Moratorium Implementation Guidelines," and recently, in accordance with Article 59-1, Paragraph 2 of the Fisheries Act, announced the "Voluntary Fishing Moratorium Reward Regulations," in which the reward amount for each sampan and fishing raft
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Are eggs the best source of protein? Nutritional comparison of white eggs and yellow eggs
Eggs are a cheap and excellent source of dietary protein. The term "excellent" refers to the proportion of essential amino acids that make up egg protein, which is quite close to the proportion of essential amino acids in human protein structure. Since the human body cannot synthesize these amino acids on its own, they must be supplied through food, and egg protein is one of the best choices.
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Aquaponics is becoming popular: Taitung Environmental Protection Bureau recommends a good way to conserve water resources
The Taitung County Environmental Protection Bureau recently held the "2019 Taitung County Water Environment Watch and Assistance Patrol Team Education and Training Activity," and invited water environment watch and assistance patrol teams from across the county to take part. Registration for the event was enthusiastic, with nearly 100 volunteers participating, and...
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Source analysis of the American ginseng planting base of Dongyu Shennong
Origin of the name of Wendeng City After Qin unified China, writing was standardized, cart axles were made uniform, and the differing cart track widths of the Warring States were unified at a width of 6 chi, with the capital Xian...
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Pond tailwater becomes a source of aquaculture pollution, where should it go?
As environmental protection efforts intensify, higher requirements have been placed on the discharge of aquaculture pond tailwater, and with the water resource tax about to be introduced, aquaculture should explore new models,...
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A Complete Analysis of Ammonia Nitrogen Sources and Degradation Methods in Aquaculture
What is ammonia nitrogen? Ammonia nitrogen refers to the combination of nitrogen present as free ammonia and ammonium ions in water. It is the main factor causing major toxicity to aquatic organisms. However, ammonium ions are not toxic. 1. Sources of ammonia nitrogen. There are four main sources of ammonia nitrogen: first, sludge. The deeper the pond sludge, the more, as temperature rises, large amounts of organic matter ferment and produce ammonia nitrogen; second, feed. After feed is digested by aquatic animals, feces and urine are excreted, producing large amounts of ammonia nitrogen. Next, residual bait is transformed by anaerobic bacteria into peptides and amino acids, and then into molecular ammonia and ammonium ion substances; third, fertilizers. Such as organic fertilizer, urea, nitrogen fertilizer, compound fertilizer, etc., are all foundations for producing ammonia nitrogen; fourth, various dead grasses and algae, which are converted into ammonia nitrogen under the action of anaerobic bacteria. 2. Ammonia nitrogen degradation. First, natural consumption. 1. Through nitrifying bacteria living in the oxygen in the water body, ammonia is converted into nitrite, and then converted by a second type of nitrifying bacteria into nitrate. Nitrate is a non-toxic substance and is converted by anaerobic bacteria into nitrogen gas, which rises and is released; 2. Algae and microorganisms. Ammonia nitrogen is also a eutrophic fertilizer. The more algae and microorganisms there are, the stronger their ability to absorb ammonia nitrogen, and the faster the ammonia nitrogen content is reduced; 3. Aquatic plants, such as water hyacinth, alligator weed, lotus root and other aquatic plants. Among them, water hyacinth has a particularly strong ability to consume ammonia nitrogen. One water hyacinth plant with 10 branches can consume the ammonia nitrogen excreted by 8 people in 24 hours. Second, artificial degradation. 1. Clean out sludge and use coke slag landfill for adsorption; 2. Control stocking density and feed bait reasonably; 3. Regularly use photosynthetic bacteria and lactic acid bacteria as well as organic acids and sodium humate for nitrifying degradation; 4. Add and change water and increase oxygen, and control and regulate water quality well. When molecular ammonia in the water body exceeds the standard, the oxygen-carrying capacity of the gill fluid of aquatic animals will decline, damaging the epidermal tissue of the gills, leading to poor oxygen exchange in the blood, and at the same time poisoning will occur. Its manifestations include damage to internal organs such as the liver, pancreas, and stomach, swelling of the gastrointestinal tract, infection after mucosal damage, secretion of large amounts of mucus, causing difficulty breathing and leading to death. Ammonia nitrogen is the number one killer of aquatic animals, and it is also the most difficult problem for aquaculture personnel to grasp and solve. Prevention and control must be carried out from the very beginning, with regular testing, and strict prevention of serious exceedances and long-term exceedances, so as to ensure the healthy and normal growth of aquatic animals.
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Controlled farming imposed on Liangzi Lake crabs to protect Wuhan's backup water source
Protecting Wuhan's backup water source through controlled farming of Liangzi Lake crabs
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Xi'an University of Technology Summer Social Practice Focuses on the Development and Utilization of Wild Vegetable Resources
Xi'an University of Technology: "Development and Utilization of Wild Vegetable Resources" Summer Social Practice Activity
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Yang Zhiyong Builds an Ideal Health Paradise on a Treasure Trove of Natural Resources
Yang Zhiyong: Building an Ideal Health Paradise on a Treasure Trove of Natural Resources
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Relying on mountain resources to find a path to higher income and prosperity
"Relying on the mountains" to find a path to prosperity
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