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Detailed Explanation of Water Source and Fish Pond Issues in Rainbow Trout Farms
(1) Water source Rainbow trout must be raised in clear flowing water. Groundwater, river water, mountain stream water and seawater can all be used, but the water supply must be abundant in all four seasons, the water temperature suitable, the dissolved oxygen sufficient, and the water clean and pollution-free. 1. Water quality. When selecting a trout farm site, it should as far as possible
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Key Technical Points for High-Yield and High-Quality Freshwater Shrimp (Macrobrachium nipponense) Aquaculture
(1) Monoculture of freshwater shrimp in ponds. 1. Pond conditions: area of 5-10 mu, water depth of 0.8-1.5 m, firm and leak-proof pond embankments, slope of 1:(2-3), flat pond bottom slightly inclined toward the drainage outlet, and silt not exceeding 20 cm. 2. Preparation before stocking: ① Chemical pond clearing: 7-10 days before stocking, fill with 20 cm of water, apply 100-125 kg of quicklime per mu after slaking, and splash evenly over the entire pond for clearing and disinfection to remove wild fish and harmful organisms; ② Aquatic plant planting: species include Hydrilla verticillata, Potamogeton maackianus, etc., with the planting area accounting for 30-50% of the pond area, then fill with water and fertilize. 3. Water quality management: ① Use microbial preparations: such as EM bacteria, photosynthetic bacteria, etc. From late August to early November, use biological bacteria once every 15 days depending on the medication situation to improve the pond water environment. ② Microporous aeration: equip one 3 kW microporous aeration pump for every 20 mu, lay main pipes parallel to the two long sides of each pond, and install 6 disc-type microporous pipe discs with a diameter of 1.5 m per mu of pond. Dissolved oxygen should be above 5 mg/L. When dissolved oxygen in the shrimp pond falls below 5 mg/L, turn on the aeration pump. Aeration time is generally from 12:00 to 16:00 in the afternoon and from 24:00 at night to 6:00 the next morning, and should be extended on rainy or muggy days. 4. Feeding management: mainly feed complete compound feed for freshwater shrimp of different specifications at different stages, supplemented with rice bran and other feed in the early stage. Feed twice a day, with 1/3 in the morning and 2/3 in the afternoon. Adhere to the "four observations" (observe the season, observe the weather, observe the water color, observe feeding activity) and the "four fixeds" (fixed time, fixed location, fixed quality, fixed quantity). The daily feeding amount is 3-7% of shrimp body weight, and the specific feeding amount should be consumed within 2-3 hours. The feed coefficient for the whole season is 1.5-1.8. (2) Mixed culture of shrimp and crabs in ponds. There is no limit to the pond area, but generally no more than 50 mu is appropriate, with a water depth of 1.0-1.5 m. Pond clearing, disinfection, and grass planting are carried out according to the operating procedures for river crab culture. Stock 5-8 silver carp and bighead carp per mu, put in 200-250 kg of live snails per mu, and plant aquatic plants mainly including Hydrilla verticillata, Potamogeton maackianus, Elodea nuttallii, etc., with the aquatic plant coverage controlled at about 60%. During the growth period of young shrimp in autumn, apply fertilizer appropriately and feed a small amount of powdered feed. When using insecticides and disinfectants, avoid both the peak molting period of river crabs and the peak molting period of freshwater shrimp.</p>
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How to raise river shrimp? Master these six key steps
1. Pond conditions and clearing. Choose a freshwater pond or shrimp pond with an area of 3-5 mu, a water depth of 1.5-2.5 m, abundant freshwater sources, no pollution, and a sandy bottom. 2. Fertilizing to cultivate feed. One week before stocking shrimp fry, filter with a 60-80 mesh silk screen, fill with 30 cm of water, and apply 50 kg of base fertilizer (fermented livestock manure) or 5 kg of urea per mu to cultivate basic feed.
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Detailed Explanation of Key Techniques for Raising Ducks in Rice Paddies, Teaching You to Master It Easily
I. Variety Selection: Raising ducks in rice paddies is an extensive rearing method, and in the rice-duck symbiotic planting and rearing model, raising ducks is only an auxiliary industry for the production of green, high-quality rice, mainly playing a role in biological control. Therefore, when selecting duck varieties, the key considerations are
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How to raise the water temperature of the pond when farming yellow eels in winter
1. Building the eel pond: Choose a sunny open area, field plot, or old ditch to build the pond. To make water changes easier, it is best to build the pond where a water source is guaranteed. Cement ponds, brick ponds, rubble ponds and rammed-earth ponds are all acceptable; seal the joints with cement slurry or rammed earth, and make sure the pond bottom and all four
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Detailed Explanation of the Methods for Selecting Breeding Frogs in Stone Frog Culture
The spawning and hatching season of stone frogs is from April to September, with May to June being the peak spawning period. To increase the spawning rate and hatching rate, it is necessary to start from the revival of breeding frogs from hibernation and do a good job in the preparation work of selecting breeding frogs, mating, spawning, hatching, and so on. Selecting breeding frogs is the foundation of
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A Detailed Explanation of the Key Technical Points for Scientific Free-Range Chicken Farming in Rural Areas
(1) Brooding: The success of brooding mainly depends on the survival rate. Focus on the following points: 1. Temperature: After the chicks hatch and are brought back, the temperature in the first week should be controlled within 34-35°C, and from the second week onward, reduce it by 2°C each week until the sixth week when heating is stopped. The method of keeping warm
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What are the environmental requirements for crayfish farming?
When it comes to crayfish, the first thing most people probably think of is how dirty they are, because before eating crayfish you have to scrub them clean with a brush, so many people believe crayfish like living in dirty environments. Is that really true? Let's find out together with the editor below.
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What preparatory work needs to be done before snakehead farming?
Speaking of snakehead, everyone is fairly familiar with it. Snakehead is very common in our lives, and it not only has high nutritional value but also has certain medicinal value. However, for beginners raising snakehead, there are still many things they do not understand. Below, let us learn about it together
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How to Raise Frogs: Breeding Methods and Key Technical Points
Everyone is very familiar with frogs. In the countryside, when it gets especially quiet at night, you can always hear waves of frog calls outside the window. Frogs catch pests in the rice paddies, but because people discovered that their meat is very delicious, they became
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