CN102919189A - Nursery pond building method capable of improving yield of procambarus clarkia seedlings - Google Patents

Abstract

The invention relates to a method for constructing a seedling pond capable of increasing the seedling output of Procambarus clarkii, and belongs to a method for breeding freshwater shrimps. The method comprises three steps of constructing the artificial shrimp nest of the Procambarus clarkii, improving the ecology of the nursery pond and catching the shrimp seedlings. In the method, special soil ridges for breeding are set in the nursery ponds, and pipes with holes are set on the slopes of the soil ridges as shrimp nests. The aquatic plants planted in the ponds and the equipped aeration equipment can improve the ecology. The present invention adopts artificial shrimp nests to raise seedlings, and the density of the nests can be adjusted at will. Increasing the artificial nests can increase the stocking amount of the brood shrimps, and taking out the pipeline in the caves can capture the brood shrimps, so the density of the brood shrimps and larvae in the nursery pond can be effectively obtained. The control is conducive to improving the survival rate of broodstock and larvae and the yield of shrimp seedlings, and improving the efficiency of seedling breeding.

Description

A method for constructing nursery pools capable of increasing the production of Procambarus clarkii nursery

technical field

The invention relates to a method for constructing a seedling pool capable of increasing the seedling output of Procambarus clarkii, in particular to a method for raising seedlings belonging to freshwater economic shrimps.

Background technique

Procambarus clarkii is native to North America and is commonly known as freshwater crayfish. It belongs to the family Arthropoda, Crustacea, Soft Armada, Decapod, and was brought into my country by the Japanese in 1929. It has been widely distributed in rivers and valleys in my country. In , ponds and major water systems, it has become an important economic species of freshwater aquaculture in my country. Due to the rapid increase in market consumption and export processing of Procambarus clarkii, the number of wild resources is decreasing sharply. Therefore, increasing the production of Procambarus clarkii through artificial breeding has become an important way to meet the needs of processing, export and consumption markets. one of the ways. At present, the seedlings of Procambarus clarkii needed for breeding mainly come from natural waters. With the decline of natural resources, artificial breeding of Procambarus clarkii has become an inevitable trend.

Although domestic Procambarus clarkii farming has formed a certain production scale, several bottlenecks restricting the industrialization of Procambarus clarkii have not been effectively resolved, the most prominent of which is the species required for large-scale farming. The problem of supporting seedlings is mainly manifested in the low efficiency of artificial seedlings, the low survival rate of parental transportation and temporary cultivation, the low yield of seedlings, and poor benefits. Generally, the yield of seedlings in ponds is only tens of thousands per mu, and it is difficult to improve the benefits of seedlings. The low yield of seedlings is related to the low fecundity of Procambarus clarkii, asynchronous spawning, irregular size of shrimp seedlings and high cannibalism rate. At present, the self-propagation and self-breeding shrimp seed breeding method is mostly used in production, or the purchased shrimp seedlings are used for stocking. Due to the low yield of shrimp seedlings and insufficient sources, the increase in stocking density is seriously restricted. Therefore, the current Procambarus clarkii culture production and Benefits are generally low, so how to improve the production of seedlings has become a key issue that the Procambarus clarkii aquaculture industry urgently needs to solve.

Contents of the invention

The purpose of the present invention is to overcome above-mentioned weak point, thereby provide a kind of nursery pool construction method that can improve Procambarus clarkii nursery output, this method is by building shrimp nest on the soil ridge of nursery pool, improving nursery pool ecology and adopting shrimp The application of the technology of catching large seedlings and keeping small ones can improve the survival rate of Procambarus clarkii seedlings, so as to increase the output of shrimp seedlings.

According to the technical scheme provided by the present invention, a method for constructing a seedling pond capable of increasing the seedling output of Procambarus clarkii adopts the following process steps: including three steps of constructing an artificial shrimp nest of Procambarus clarkii, ecological improvement of the seedling pond, and fishing for shrimp seedlings , characterized by:

(1) Construction of artificial shrimp nest of Procambarus clarkii

In the Procambarus clarkii nursery pool, the special-purpose soil ridge for breeding is set, the height of the ridge is 1.0-1.5 meters, and the slope ratio of the slope of the ridge is 2-4: 1. On the slope near the water surface line, 1-10 rows of diameters of Several caves with a depth of 6.0-10 cm and a depth of 20-50 cm are used as broodstock breeding nests; the distance between the caves is 10-50 cm; in order to prevent the caves from collapsing, the caves are inserted into the caves with a length of 20-50 cm and a diameter of 5.0 cm. -9.0 cm pipe, the mouth of the pipe is flush with the slope of the soil ridge.

(2) Ecological improvement of nursery ponds

Aquatic plants are planted in the Procambarus clarkii nursery pond to improve the ecological environment of the nursery pond; microporous oxygenation pipes are laid in the Procambarus clarkii nursery pond, and the diameter of the microporous oxygenation pipe is 2.0-5.0 cm.

(3) Shrimp fishing

Shrimp seedlings need to be carefully fed and managed after hatching. Shrimp seedlings with a body length of 2.0-8.0 cm are caught every day in shrimp cages, and the mesh of the shrimp cages is 1.0-1.5 cm.

As a further improvement of the present invention, the pipes inserted into the caves are plastic pipes, glass fiber pipes or bamboo pipes.

As a further improvement of the present invention, the pipeline inserted into the cave is provided with a pipeline hole, the

The diameter of the pipe holes is 1.0-2.0 cm, and the distance between the pipe holes is 1.0-10.0 cm.

As a further improvement of the present invention, the aquatic plants are planted at a distance of 0.3-1.0 meters, and the coverage rate is 40%-80% of the area of the nursery pond.

As a further improvement of the present invention, the planting time of the aquatic plants is: Elodea is planted from October to April of the following year, and Hydrilla verticillium is sown in March.

As a further improvement of the present invention, the power configuration of the microporous aerator is 2.2 kw per 15-20 mu.

As a further improvement of the present invention, the aquatic plants are Elodea, Hydrilla verticillium, bitter grass, Zizania japonica, yellow silk algae, water peanuts, water hyacinth and duckweed or one or more of them.

Compared with the prior art, the present invention has the following advantages:

1. Set up soil ridges in the Procambarus clarkii nursery pond, and build artificial caves on the soil ridges for brood shrimps to live in, which can increase the stocking density and stocking survival rate of brood shrimps; 2. The distribution density of caves can be adjusted at will and the distribution rules can be Avoid overcrowding of broodstock and mutual interference; 3. Take out the pipe in the cave to catch broodstock, which saves labor and effort and has high fishing efficiency; 4. The density of larvae in the nursery pond can be adjusted by adjusting the number of broodstock to reduce The cannibalism rate between shrimp seedlings; 5. After inserting the pipe with holes in the cave, it can avoid the collapse of the soil ridge due to the digging of the broodstock; 6. The pipe with holes is breathable and permeable, and it is easy for the broodstock to climb and inhabit; 7. Planting a variety of aquatic plants in the nursery pond can be used as a shelter for broodstock and shrimp seedlings, and at the same time has the function of improving the ecology, which is conducive to improving the survival rate and seedling output of broodstock shrimp and shrimp seedlings.

Description of drawings

Fig. 1 is the schematic diagram of the artificial cave in the soil ridge in the pond seedling pond of the present invention.

Fig. 2 is a schematic diagram of a perforated pipeline in a cave according to the present invention.

Detailed ways

Below the present invention will be further described in conjunction with embodiment:

Embodiment one:

The invention provides a method for constructing a seedling pond capable of increasing the seedling output of Procambarus clarkii, which adopts the following process steps:

In the Procambarus clarkii nursery pool, the special-purpose soil ridge 1 for breeding is set, and the soil ridge 1 is 1.0 meters high, and the slope ratio of the soil ridge 1 slope is 3: 1, and 5 rows of diameters of 10 centimeters, The depth is the cave 3 of 30 centimeters as the nest of broodstock breeding. The spacing between caves 3 is 20 cm. Insert long 20 centimeters in the cave 3, and diameter is the pipe 5 with holes of 9.0 centimeters, and the nozzle is flush with the slope of the soil ridge. The pipe is provided with holes 6, the diameter of the holes on the pipe with holes is 1.0 cm, and the distance between the holes is 2.0 cm. Water peanuts are planted along the water level line 2 on the ridge, and Elodea, Hydrilla verticillium, and bitter grass are planted in the pool. The aquatic plants on the ridge cover the artificial nest so that it has good concealment. Put water peanuts, water hyacinths and duckweeds that account for 40% of the water surface in the pool. Aquatic plants 4 are planted at a distance of 0.5 meters, and the coverage rate is 60% of the nursery pond area. Elodea is planted in November, and Hydrilla verticillium is sown in March. The power configuration of the microporous aerator is 2.2 kw per 20 mu. Shrimp seedlings with a body length of 2.0-8.0 cm are caught every day in shrimp cages with a mesh of 1.0 cm.

Embodiment two: a kind of method for constructing the nursery pool of the present invention that can improve the production of Procambarus clarkii nursery, adopts the following process steps:

In the Procambarus clarkii nursery pond, special-purpose soil ridges for breeding are set. The height of the ridge is 1.5 meters. Centimeter burrows serve as breeding nests for broodstock. The spacing between the caves is 30 cm. A perforated pipe with a length of 40 cm and a diameter of 7.0 cm is inserted into the cave, and the mouth of the pipe is flush with the slope of the soil ridge. The hole diameter on the perforated pipe is 1.5 cm, and the hole spacing is 1.0 cm.

Water peanuts are planted along the water level on the ridge, and Elodea, Hydrilla verticillium, and bitter grass are planted in the pool. The aquatic plants on the ridge cover the artificial nest so that it has good concealment. Put water peanuts, water hyacinths and duckweeds that account for 60% of the water surface in the pool. Aquatic plants are planted at a distance of 0.5 meters, and the coverage rate is 40% of the nursery pond area. Elodea was planted in March, and Hydrilla verticillium was sown in February. The power configuration of the microporous aerator is 2.2 kw per 15 mu. Catch shrimp with a body length of 2.0-8.0 cm in a shrimp cage every day, and the mesh of the shrimp cage is 1.0 cm

Embodiment three: a kind of method for constructing the nursery pool that can improve the output of Procambarus clarkii nursery of the present invention adopts the following process steps:

In the Procambarus clarkii nursery pond, special-purpose soil ridges for breeding are set. The height of the ridge is 1.5 meters. Centimeter burrows serve as breeding nests for broodstock. The spacing between the caves is 40 cm. A perforated pipe with a length of 35 cm and a diameter of 9.0 cm is inserted into the cave, and the mouth of the pipe is flush with the slope of the soil ridge. The hole diameter on the perforated pipe is 0.8 cm, and the hole spacing is 1.0 cm.

Water peanuts are planted on the ridge above the water level, and Elodea, Hydrilla verticillium, and bitter grass are planted in the pool. The aquatic plants on the ridge cover the artificial nest so that it has good concealment. Put water peanuts, water hyacinths and duckweeds that account for 50% of the water surface in the pool. Aquatic plants are planted at a distance of 0.5 meters, and the coverage rate is 50% of the area of the nursery pool. Elodea was planted in January, and Hydrilla verticillium was sown in March. The power configuration of the microporous aerator is 2.2 kw per 20 mu. Shrimp seedlings with a body length of 2.0-8.0 cm are caught every day in shrimp cages with a mesh of 1.0 cm.

Claims (7)

1. A method for constructing a nursery pool that can improve the output of Procambarus clarkii nursery, is characterized in that: adopt the following process steps: (1) Construction of artificial shrimp nest of Procambarus clarkii In the Procambarus clarkii nursery pond, special-purpose soil ridges for breeding are set, the height of the ridges is 1.0-1.5 meters, and the slope ratio of the slopes of the ridges is 2-4: 1, and 1-10 rows of diameters of 6.0-10 meters are inserted on the slopes of the ridges. Several caves with a depth of 10 cm and a depth of 20-50 cm are used as nests for broodstock breeding; the distance between the caves is 10-50 cm; to prevent the caves from collapsing, the caves are inserted with a length of 20-50 cm and a diameter of 5.0-9.0 cm pipe, the mouth of the pipe is flush with the slope of the soil ridge; (2) Ecological improvement of nursery ponds Plant aquatic plants in the Procambarus clarkii nursery pond to improve the ecological environment of the nursery pond; lay microporous aeration pipes in the Procambarus clarkii nursery pond, and the diameter of the microporous aeration pipe is 2.0-5.0 centimeters; (3) Shrimp fishing Catch the shrimp seedlings with a body length of 2.0-8.0 centimeters every day with a shrimp cage, and the mesh of the shrimp cage is 1.0-1.5 centimeters. 2. A method for constructing a nursery pond capable of increasing the seedling output of Procambarus clarkii as claimed in claim 1, characterized in that: the pipeline inserted in the cave is a plastic pipe, a glass fiber pipe or a bamboo pipe. 3. a kind of nursery pond construction method that can improve Procambarus clarkii nursery output as claimed in claim 1 is characterized in that: the pipeline inserted in the described cave is provided with pipeline hole, and the aperture of described pipeline hole is 1.0 -2.0cm, pipe hole spacing is 1.0-10cm. 4. A kind of nursery pond construction method that can improve Procambarus clarkii nursery output as claimed in claim 1, is characterized in that: the spacing of described aquatic plant planting is 0.3-1.0 meter, and coverage rate is 40% of the nursery pond area. %-80%. 5. A kind of nursery pond construction method that can improve Procambarus clarkii nursery output as claimed in claim 1, is characterized in that: the planting time of described aquatic plants is: Elodea is planted in October to next April, Hydrilla verticillium is sown in March. 6. A method for constructing a nursery pond capable of increasing the seedling output of Procambarus clarkii as claimed in claim 1, characterized in that: the power configuration of the microporous aerator is 15-20 mu/2.2 kw. 7. A kind of method for constructing nursery pools capable of improving the output of Procambarus clarkii nursery as claimed in claim 1, characterized in that: said aquatic plants are Elodea, Hydrilla verticillium, bitter grass, Zizania chinensis, and yellow silk algae , water peanuts, water hyacinth and duckweed or one or more.

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