In 2018, how to improve the production, specifications and phases of crayfish breeding? – Aquatic Forum – China Animal Husbandry Website – A useful animal husbandry website

Spicy crayfish has undoubtedly become our summer to go to the street. The popularity of hemp has also driven a strong demand for crayfish breeding. Due to the high economic benefits of crayfish, the market continues to strengthen, and its farming is increasing. At present, the national crayfish breeding area is mainly concentrated in Hubei Province, Jiangsu Province and Anhui Province. Official data shows that in 2015, the total area of ​​Hubei Province, the total area is only 5.70,000 mu, and the 2016 Xiaobi farming has more than 1.2 million mu, and this year has continued to expand the trend. In 2015, in 2016, the national crayfish farm was 720,000 tons and 850,000 tons. In August 2017, the national crayfish breeding production is 950,000 tons, with an area of ​​more than 9 million mu; It is expected to March this year, the national crayfish breeding area May exceed 10 million mu, 2018 national crayfish breeding production will reach more than 10 million tons. The specifications are large, the products are better, the listing is early, and the latency is the control standard for crayfish breeding benefits. It is also a watershed in breeding technology. At present, crayfish breeding mainly has three kinds of farming models such as rice fields, pond precatology, shrimp crabs, with pond precaining 6,000-8,000 seedlings per acre seedlings, and crayfish production is generally 200-300 kg / mu. The average specifications are calculated by 6 yuan, and the survival rate is less than 60%; some although the survival rate is high, the craftscent specification is low (4 ~ 5 money), the economic value is not high, but also another factor that does not make money . Dobami breeding technology .jpg

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According to experience in the aquaculture first line, the author analyzes that the leading rate of crayfish farming is low, and the main cause of small specifications has the following aspects. 1. The environmentally deteriorating crash is high, the water is more, the amount of water is large, and the water fertilizer is inevitable, which is easy to cause inverted algae, and the algae in the algae will also cause harm (due to the high pH of cyanobacteria ” The illegal environment is easy to become a hotbed burst of cyanobara. It is usually a high-nitrogen environment. The sharp-increasing hydroxide will cause more ammonium ions to form molecular ammonia, resulting in soaring molecular ammonia. Ammonia poisoning. At high pH, ​​high ammonia nitrogen, high chloride residual hydraulic hydrazine, which causes liver of crayfish. liverThe pancreas is a crayfish to absorb nutrients, immunization, and detoxify important organs. Once the lesions are damaged, the light will make the crayfish to absorb nutrients normally, and the growth is affected, which causes the small lobster to take a shell. even death. , 2, the anti-nutrient factor in the feed is a misstantic animal, and the feed is generally 60% of plant raw materials, and animal raw materials account for about 40%. As far as the author inspected in Hubei Qianjiang, Jianli, the local crayfish feed protein is 25 ~ 30%, the price is more than 3,000 ~ 4,000 yuan / ton, so it will inevitably cause too much vegetable protein in the feed, There is too much toxic and hazardous substances such as soybean trypsin inhibitors (soybean meal), sulfide (vegetable cake), and xyloxin (peanut cake), and yellow beam (peanuts). When crayfish eat this kind of feed for a long time, it will cause lesions on its liverpsis, resulting in slow growth and severe immunity, and disease outbreaks. So how do I improve the production, specifications and layers of crayfish breeding? First, maintain a stable water quality. Try to use iodine preparation when sterilizing, avoiding the use of the residual chlorine preparation; supplementation phosphate fertilizer in time, a small amount of the nitrogen-phosphorus ratio is reached reasonable, stabilized in the water, reducing cyanobic Outbreak; Timed an oxygenator to ensure that oxygen in the water is sufficient. The second is to feed high quality bait. According to the water temperature, the protein content is high, the nutritious high-quality feed is supplemented by the nutrients required for lobster growth, helping to concentrate smoothly, restore physical fitness, and nutrition accumulation. The third is to do a good job of liver pancreasiness in crayfish. Add bile acids during crayfish feeds, which helps liver pancreatic health, promote the absorption and utilization of nutrients in feed, especially to promote cholesterol absorption, so that crayfish is smooth, grow, and increase weight; enhance the liver The detoxification and detoxification function, the auxiliary liver is excreted in vitro, indirectly increase the immunity of crash and survival. (Source: Longchang motivation)

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Cranefish breeding, crayfish production, crayfish specification, crayfish products, crayfish liver pancreas

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