Small Reservoir River Raft Culture Technique
2018-06-19 23:01:32
Zhuji City, Zhejiang Province is in a hilly area. The city has 70000 acres of fish surface, 70% of which are small reservoirs in Shantang. In order to improve the internal structure of the aquaculture industry and further improve the economic benefits of small reservoirs based on irrigation, in 2002, We have conducted a small-scale experiment on river-reservoir fertilization and have achieved satisfactory results.
First, the basic situation
1. Reservoir selection. The Gonghu Reservoir has a catchment area of ​​3.4 square kilometers. When the normal water level, the fish area is 57 mu, the average water depth is 3.5 meters, the deepest depth is 8.7 meters, and the downstream irrigation grain field is 105 mu.
2. Clear pond disinfection. Because of the need for irrigation, the reservoir cannot dry out. In early January of 2002, a 100kg/mu quicklime zone was used for the depot disinfection.
3. Fish bream stocking. In early February 2002, stocking was carried out in October of the previous year with the insertion of a good-quality, disease-free one-year-old spinnaker of 1,000 pounds per mu. Hexa breeding bag hanging method, each size is 15cmx40cm, mesh 2cmx2cm polyethylene flat mesh bag placed vertically down 4 river quails, mesh bags hanging on a polyethylene rope lifted with a plastic float Requires the river to be about 15cm from the water surface. At the same time, put appropriate amount of strong fish species, using polyculture. Before the rods are stocked, they must be strictly disinfected.
Second, feeding and management
1. Feeding and fertilizing. The river radon is dominated by plankton in drinking water, so fertilizing and cultivating water quality is particularly important. After clear ponds, 300kg/mu of fermented duck dung was applied. After the fish pupa are stocked, they can input part of the fermented soil fertilizer or compound fertilizer according to their needs. They are used in small quantities several times, generally 3 times per month. The amount of the fish urine is determined by the weather and the color of the water. The transparency of the pool water is required to reach about 30cm. At the same time, appropriate stocks and concentrates must be fed daily for stocked fish species.
2. Ground lime. Quicklime can not only regulate water quality, but also disinfect the water body. It is splashed once a month with 30kg/mu quick lime, and the flood season of the river raft needs to increase to 3 times per month.
3. Timely inspections and good records. On the basis of good morning and evening patrols, we should carry out a sampling inspection every day and make a record; every half a month, we must inspect the entire river bank and remove the attachments on the bags. According to different seasons, by increasing or decreasing the float, the water depth of the hanging net bag is adjusted, and it is required to be deeper in winter and summer.
Third, a few experience
1. To correctly handle the relationship between irrigation and cultivation, the reservoirs are mainly based on irrigation. Therefore, it is necessary to properly handle the relationship between irrigation and the cultivation of river rafts. In recent years, with the liberalization of the grain purchase and marketing system, the benefits of grain production are low, and many farmland are ridiculous. Therefore, as long as reasonable irrigation and scientific water saving can generally ensure the normal level of fish farming. Individual reservoirs of drinking water sources, it is best not to raise oyster breeding beads.
2. The cost of aquaculture in reservoir river breeding pearls is lower. Reservoirs are mainly based on irrigation, and usually the contracted funds are lower. At the same time, due to the large area of ​​rainwater collected by the reservoir, the exchange of water bodies is frequent, which can reduce the higher cost of water extraction in inner pond culture. .
3. The reservoir for carrying out river raft breeding must be strictly selected. First, the reservoir must have a large area of ​​rainwater to avoid drying up during heavy droughts. The area of ​​normal fish farming is more than 50 acres, the terrain is relatively flat, and the lighting requirements are sufficient. It is best to choose upstream reservoirs with domestic sewage inflows and fertilizers with higher natural production of fish.
4. It is advisable to provide aerators for aerobics to carry out river rafts. The education of pearls is based on Tianyuzhu. When the weather is hot and humid, it cannot be flushed. It is often easy to cause fish floating heads and affect the growth of river rafts. Therefore, it is advisable to have oxygen-increasing equipment under the conditions permitting, and if necessary, turn on the machine promptly to promote the growth of the surimi.
First, the basic situation
1. Reservoir selection. The Gonghu Reservoir has a catchment area of ​​3.4 square kilometers. When the normal water level, the fish area is 57 mu, the average water depth is 3.5 meters, the deepest depth is 8.7 meters, and the downstream irrigation grain field is 105 mu.
2. Clear pond disinfection. Because of the need for irrigation, the reservoir cannot dry out. In early January of 2002, a 100kg/mu quicklime zone was used for the depot disinfection.
3. Fish bream stocking. In early February 2002, stocking was carried out in October of the previous year with the insertion of a good-quality, disease-free one-year-old spinnaker of 1,000 pounds per mu. Hexa breeding bag hanging method, each size is 15cmx40cm, mesh 2cmx2cm polyethylene flat mesh bag placed vertically down 4 river quails, mesh bags hanging on a polyethylene rope lifted with a plastic float Requires the river to be about 15cm from the water surface. At the same time, put appropriate amount of strong fish species, using polyculture. Before the rods are stocked, they must be strictly disinfected.
Second, feeding and management
1. Feeding and fertilizing. The river radon is dominated by plankton in drinking water, so fertilizing and cultivating water quality is particularly important. After clear ponds, 300kg/mu of fermented duck dung was applied. After the fish pupa are stocked, they can input part of the fermented soil fertilizer or compound fertilizer according to their needs. They are used in small quantities several times, generally 3 times per month. The amount of the fish urine is determined by the weather and the color of the water. The transparency of the pool water is required to reach about 30cm. At the same time, appropriate stocks and concentrates must be fed daily for stocked fish species.
2. Ground lime. Quicklime can not only regulate water quality, but also disinfect the water body. It is splashed once a month with 30kg/mu quick lime, and the flood season of the river raft needs to increase to 3 times per month.
3. Timely inspections and good records. On the basis of good morning and evening patrols, we should carry out a sampling inspection every day and make a record; every half a month, we must inspect the entire river bank and remove the attachments on the bags. According to different seasons, by increasing or decreasing the float, the water depth of the hanging net bag is adjusted, and it is required to be deeper in winter and summer.
Third, a few experience
1. To correctly handle the relationship between irrigation and cultivation, the reservoirs are mainly based on irrigation. Therefore, it is necessary to properly handle the relationship between irrigation and the cultivation of river rafts. In recent years, with the liberalization of the grain purchase and marketing system, the benefits of grain production are low, and many farmland are ridiculous. Therefore, as long as reasonable irrigation and scientific water saving can generally ensure the normal level of fish farming. Individual reservoirs of drinking water sources, it is best not to raise oyster breeding beads.
2. The cost of aquaculture in reservoir river breeding pearls is lower. Reservoirs are mainly based on irrigation, and usually the contracted funds are lower. At the same time, due to the large area of ​​rainwater collected by the reservoir, the exchange of water bodies is frequent, which can reduce the higher cost of water extraction in inner pond culture. .
3. The reservoir for carrying out river raft breeding must be strictly selected. First, the reservoir must have a large area of ​​rainwater to avoid drying up during heavy droughts. The area of ​​normal fish farming is more than 50 acres, the terrain is relatively flat, and the lighting requirements are sufficient. It is best to choose upstream reservoirs with domestic sewage inflows and fertilizers with higher natural production of fish.
4. It is advisable to provide aerators for aerobics to carry out river rafts. The education of pearls is based on Tianyuzhu. When the weather is hot and humid, it cannot be flushed. It is often easy to cause fish floating heads and affect the growth of river rafts. Therefore, it is advisable to have oxygen-increasing equipment under the conditions permitting, and if necessary, turn on the machine promptly to promote the growth of the surimi.
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