Breeding Techniques of Herring Catfish
The Maiergara squid (abbreviated as Maijiu) is a genus of 鲤, 亚, and 亚. It is native to India and was introduced in China in the late 1980s. Wheat bran is long, flat, and cylindrical. The base of the light-colored caudal fin has an obvious dark spot (more prominent in the seedling stage), lower mouth, blue back, and white belly. Wheat bran is a subtropical fish that is not tolerant of low temperatures. Its water temperature is frozen below 7-90°C, frostbite is below 11°C, and it is stopped when it is about 15°C. It can be overwintered when it is above 18°C. Wheat bran is mainly distributed in the Pearl River Valley and Hainan Province in China, and it is often used as a stage-feeding fish for the farming of catfish. It is introduced and cultured by farmers in the Yangtze River Valley. Wheat oysters are miscellaneous, mainly feeding on plant feeds, but also eating part of zooplankton, artificial diets, and incomplete digestion of livestock and poultry excreta. Wheat bran is well-tolerated by a large number of producers and consumers because of its advantages of high density, high population yield, strong disease resistance, short breeding cycle, easy catching, beautiful appearance and tender meat. Now we will introduce the breeding technology of wheat bran as follows. 1. The wheat pond summer cultivation technique requires that the pond area should not be too large, preferably 2000-3335m2, and the water depth 2.0-2.5m. If it is necessary to enter the drainage capacity, the pond must be completely disinfected and cleaned before entering the water. The bottom of the pond is thoroughly disinfected in the pond and the base fertilizer is applied. The water is added to the depth of 50-60cm. When the water is added, it is filtered with a dense net to prevent wild fish and other harmful organisms from entering, usually after 2-3 days of fertilization. , In time, put the water spray into the pool. The stocking density is 500,000 to 667 m2 or 800,000 to 1 million to 667 m2. After 20 days of cultivation, the seedlings can grow into 2.5-3.0 cm seedlings. The survival rate is about 70%. Science is fed in the first 7 days after the wheat aphid, and 1.5-2.0 kg of soybean milk is fed every 667m2 every day, divided into 2-3 splashes, and it is sprinkled evenly. The morning is at 8-9 and the afternoon is at 14-15. Observe the activities and feeding conditions of fry in the pool, and adjust the frequency and quantity of feeding in time. The water in the pool immediately under the regular water injection is small, the depth of the pool is 60cm, the shallow water temperature is easy to rise, various organic matters are easily decomposed, the plankton breeding is fast, and the shallow water space of the pool water is small, the utilization rate of the food is high, and the growth of the fry can be accelerated. Days later, fresh water is added every 7-10 days, 10-15cm each time. Sooner or later, the ponds were observed to observe the activities of the fry and the changes of the water color. The amount of feeding and fertilizer was determined. A frivolous head appeared before the sunrise in the morning and fell immediately after being frightened, indicating that the pool water was very moderate; after the sunrise, the fry was still floating. It is necessary to add new water in a timely manner to reduce or stop the fertilization. At the same time, we must observe whether there are diseased fish, and if so, we must promptly dispose of it; we must remove the frog eggs at the pool in time. After 15-20 days of cultivation, the fry larvae have grown to a body length of 2.5cm or more. The larvae should be opened to enhance the fish's constitution in order to facilitate the transshipment and external sales of the larvae. The quarrying must be carried out gradually and cannot be rushed. Identification of high-quality wheat bran summer flowers High-quality wheat bran summer flower head small, solid color, moisturizing, specifications are very neat, fry in the pond moves quickly, clusters strong, scared soon after diving into the bottom, strong feeding, visible water surface when feeding Little rippling, better observation in the tie-box, in the container like the activities of the water or the top water swimming; poor quality of the wheat aphid summer flowers, head large back narrow, tail handle fine, action sluggish, swimming loose, frightened When the reaction is not agile, the population is severely differentiated, and the body is dark in color and dark in color. 2. Maitreya pond main cultivation technique The main pond requirement for the pond is not particularly strict with the requirements of the pond, usually the area is 1334-10000m2, the pool depth is more than 1.5m, and the water source is sufficient. Fish rearing From late May to early June, stocking 6,000-8,000 tails/667m2 with uniform specifications and robust physique, along with appropriate amounts of oysters, oysters, grasses, and fish, will prevent carnivorous fish such as black plover to survive. The existence of the main pool. Feeding and management often fertilize water, especially in high-temperature months from June to September, fertilize 1-2 times a week, add water once a month, and add water 10-20cm each time. Moderate fertilization can greatly reduce the direct consumption of wheat bran and thus better control the cost. Therefore, the source of pig manure, cow dung, etc., which is rich in low-cost sources, is the key to gaining benefits from the main breeding of wheat aphids. In order to grow wheat bran into the market in a short period of time, it is necessary to prepare fine ingredients (artificial feed for wheat bran or rapeseed meal, cakes, etc.) for "four definite" feeding. Supplemented by feeding, from July to October, feeding was mainly supplemented by fertilization. Before July, the daily feeding amount was 3%-5% of the total weight of wheat bran, and after July, it increased to 5%-8%. The specific amount was determined according to the weather conditions at the time and combined with the feeding conditions of wheat bran. The harvesting of wheat bran depends on the group's output to obtain high yield. Therefore, timely harvesting in the main pond cultivation is particularly important. From August to September, the ponds have more fish and the growth is slowing down. The market also reduced the pond load, making the remaining wheat stubble smaller and having more room for growth. Cultivation must be completed in late October or mid-November in order to avoid the effects of freezing and freezing. (Inland Aquatic Products)
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