-
What is the one-year-old fish fingerling rearing model in the Guangdong-Guangxi region?
The method of rearing one-year-old fish fingerlings in the Guangdong-Guangxi region differs from that in Jiangsu and Zhejiang. Rather than starting with polyculture of multiple species, monoculture is carried out in the early stage, and after the fish grow to 5-6 cm, polyculture is then carried out according to a ratio. The advantages of this method of rearing one-year-old fish fingerlings in Guangdong and Guangxi are: (1) The survival rate of fish in early-stage monoculture is relatively high, generally 80%-90%. (2) When stocking in proportion in the later stage, "eliminating the inferior and selecting the superior" can be applied. Selecting fish with strong constitutions for polyculture can correspondingly increase the survival rate
-
Comprehensive Utilization Methods of Fish Fingerling Ponds During the Winter Fallow Period
Raising market-size fish: Using winter-fallow fingerling ponds to raise one season of market-size fish can both increase production and help ease the "summer shortage" in the aquatic product market. Because the rearing period is relatively short and temperatures are relatively low, the following techniques should be adopted: 1. Stock early, that is, stock immediately after the fingerlings are combined into ponds, so as to make full use of the growing period. Stocking rate is calculated at a maximum water depth of 2 m, generally 125-150 kg per mu. The stocking ratio is generally about 40% silver carp, about 10% bighead carp, about 30% grass carp and bream, and about 20% black carp and common carp.
-
Garden balsam is also called fingernail plant, tougu cao, golden phoenix flower, sajin hua, jimingzi, and xiaotao.
Scientific name: Impatiens balsamina. English name: Garden Balsam. Aliases: fingernail plant, tougu cao, golden phoenix flower, sajin hua, jimingzi, xiaotao. Family name: Balsaminaceae. Genus name: Impatiens. Adapted regions: native to China, India and the Malay Archipelago, widely cultivated in central and southern China. Ecological classification: herbaceous plant, annual and biennial flowers. Ornamental classification: flowering plants. Morphological characteristics: annual herb, plant height 30-60cm. Stem fleshy.
-
Stocking fish fingerlings in early spring requires care; mastering the method is key
Fingerling quality For fingerlings of the same species and age, the specifications should be uniform, with little difference in body length and body weight, thick back muscle, bright color, intact scales and fin rays, normal activity, and strong upstream-swimming ability. After being taken out of the water and placed in a basin, the gill cover should not open, the tail should not bend, and the fish should keep jumping, with no wounds or parasites on the body surface. Fingerling disinfection Some farmers do not disinfect fingerlings at all when stocking them, resulting in a high disease rate, and drug treatment is not ideal. In fact, as long as fingerling disinfection is done well, it often achieves twice the result with half the effort in preventing fish diseases. Fingerlings
-
What medication should be used to disinfect fish fingerlings? Polymeric iodine works well
Winter and spring are the seasons with a high incidence of fish saprolegniasis, so disinfection of fish fingerlings must focus on preventing and treating saprolegniasis. After the specific remedy malachite green was banned, polymeric iodine is a relatively ideal medication for preventing and treating saprolegniasis. The full name of polymeric iodine is compound S polymeric iodine. It has an extremely strong killing effect on bacteria, viruses and fungi, and its bactericidal capacity is more than 10 times higher than that of povidone iodine. In addition, polymeric iodine contains a relatively high amount of traditional Chinese medicine ingredients, and for fish fingerlings injured by net-pulling operations and long-distance transport, it has the function of healing wounds extremely quickly.
-
Prevention and Control Methods and Technical Key Points for Complications in Fingerling Fish
An unusual combination of complications - rotten gills, enteritis and hemorrhage - once occurred in fingerling fish in Sanhe Town, Hongze County, Huai'an City, Jiangsu Province, causing large-scale deaths of fingerlings. The specific details of the disease and its prevention and control measures are summarized below for everyone to discuss together. Onset time and symptoms: In early August, scattered dead fish appeared, and the diseased fish had Trichodina on their gill filaments, with no other symptoms. Around mid-August, mass mortality occurred, and all were grass carp fingerlings. The diseased fish turned dark in body color and showed a behavior of lying at the edge, floating weakly by the pond bank and stopping feeding. When the diseased fish were scooped up
-
Bag-disinfection method for fish fry and fingerlings stocked in spring
"Bag disinfection" of fish fry and fingerlings is a new disinfection method summarized and used by fish farmers in recent years. Its advantages are that it is simple and convenient, costs little, can reduce fish diseases, and gives a high survival rate. The method is: 1. Operation (1) Place the nylon bag holding the fish fry and fingerlings at the pond edge (untie the bag opening), with the water level inside the bag level with that outside. (2) Pour the medicinal solution into the bag and shake well, and observe the activity of the fish fry and fingerlings; after the disinfection time is completed, put them into the pond. 2. Drug preparation and soaking time (1) 3%-5% salt solution, soak the fish fry and fingerlings for 20 minutes, can prevent and treat bacterial diseases
-
Technical key points and precautions for stocking fish fingerlings in winter
1. "Five conversions" of fish ponds. Convert "small ponds" to "large ponds", "stagnant ponds" to "live-water ponds", "shallow ponds" to "deep ponds", "leaking ponds" to "water-retaining ponds", and "emergency ponds" to "flood-control ponds". When renovating ponds, first drain the pond water, and after sun-drying, remove excess sludge from the pond bottom, keeping only a 15-20 cm layer. Remove weeds, dredge channels, and raise the pond embankments. 2. Pond clearing and disinfection. Keep the pond at a water depth of 10 cm. First, for every 667 sq m of water surface, use 90 kg of quicklime or 4 kg of bleaching powder containing 30% chlorine,
-
How to cultivate fingerlings after autumn stocking to ensure the survival rate
Doing a good job of autumn intensive cultivation of fingerlings is the key to improving the overwintering survival rate of fingerlings. To improve the environment, before stocking the fingerlings, release half of the original pond water and then add fresh water. Apply 150 kg of fermented manure per mu of pond, once every 9 days, for a total of 3-5 applications. Appropriately apply additional chemical fertilizer mainly consisting of nitrogen and phosphorus; generally apply 1.5-2.5 kg of urea and 3-5 kg of superphosphate per mu of pond, once about every 7 days. After each fertilization, add fresh water so that the pond water transparency remains at 20-30 cm. Every half month, use 10
-
What are the measures for intensive autumn cultivation of fingerlings?
1. Improve the growing environment. After several months of rearing in the original fingerling cultivation pond, the water quality gradually deteriorates, which is unfavorable for fingerling growth. Measures should be taken to improve it. First, add fresh water: drain 1/3-1/2 of the original pond water, then add fresh water at the same temperature. Second, apply fertilizer: appropriately apply more fermented manure, generally about 150 kg per mu each time, once every 7-10 days, for a total of 500-750 kg, generally by placing small heaps or splashing over the whole pond. In addition, appropriately apply
条件筛选