Leech culture method

Technical Field

The invention belongs to the technical field of aquaculture, in particular relates to a method of cultivating leech.

Background Art

The leech, common name leech, cold-blooded annelids, action very agile, will be wavy travel, also can be used as inchworm type moving. In my south and north can be growth and propagation, are living in fresh water reservoir, ditches, paddy field, limnological in, in order to organic rich pond or pollution-free of most small in the river. The leech is a traditional special pharmaceutical aquatic animal, the dry product can be medicine infusion after, for treating stroke, hypertension, stasis, amenorrhea, traumatic injury and the like. With the development of the leech related Chinese, development and popularization, leech demand is increasing year by year, however wild leech of shortage, has far not can meet the market on the significant supply and demand, so the urgent need for artificial cultivation to fill the market on the significant supply gap. From the current master of leech breeding technology perspective, most of the cultivation method has low feed conversion rate, leech harvesting difficulties, leech output decline in the quality and, therefore, an urgent need to develop a better method for breeding.

Content of the invention

The invention aims at providing a method of cultivating leech, and can effectively improve the quantity and quality of the leech.

The invention through the following technical proposal:

A leech breeding method, comprises the following steps:

(1) build a breeding cage:

In the breeding building breeding cage, cage long 5 - 7m, wide 2 - 3m, high 1 - 1 .5m, the material of the cage 80 the purpose of which is arranged on the net, the net cage bottom even laying a layer of graphite silica;

(2) culture pond is set:

In the breeding after disinfection to into the river, and the algae pond planted on the surface of the water, cultivation of pond area 1/2 - 2/3;

(3) put in the seedlings:

Selecting an individual heavy is 0.6 - 0.8g/strip of leech seedling, first put into the mass fraction is 2% salt soaked in water solution of 2 - 3min, after being taken out to 700 - 800/sq m section of the stocking density for the net;

(4) feeding management:

The total mass of the daily feeding of the leech 14 - 18% of leech special feed, is divided into two times each day feeding, the leech special feed is composed of the following parts by weight of substance: 60 - 70 parts of snail meat, 30 - 40 parts of clam, 20 - 25 parts of fish meal, 8 - 12 parts of bone meal, 4 - 8 copies of maize meal, 3 - 5 copies of soya bean lecithin, 6 - 8 parts of skim milk, 2 - 3 parts horse oil, 1 - 2 parts of sorbitol, 0.1 - 0.3 parts of composite vitamin, 2 - 4 portions of glucose, 2 - 5 parts of traditional Chinese medicine additive;

(5) water quality management:

Control in the breeding water temperature is 22 - 26 °C, pH value is 7.0 - 7.5, frequently changing the water in order to keep the concentration of hydrogen sulfide in the water is not greater than 0.05 mg/L, the nitrite concentration is not greater than 0.03 mg/L.

Further, step (4) in the composite vitamin contains vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B9, vitamin B12, vitamin C, vitamin D, vitamin E and vitamin K.

Further, step (4) in said Chinese medicinal additive is composed of the following parts by weight of material: 6 - 10 parts of nard, 5 - 8 parts of licorice, 4 - 7 share Ye, 3 - 5 share cloth dregs leaf, 2 - 4 parts of ginger, 1 - 3 parts of Asiatic moonseed rhizome, 2 - 5 share China tree skin, preparation method thereof is common after mixing the components, drying and pulverization over 600 mesh form.

Further, step (4) of the leech in special feed preparation method is to prepare each component is mixed after drying and crushing through 200 mesh, then conventional granulation can be.

The invention has the following effects:

The invention according to the defects of the prior leech planting method is improved, in the aquaculture pond to build a separate culture, the finished product is the capture of the leech and leech the growth situation of observation, in the bottom of the cage laying a layer of graphite silica, has a unique energy release properties, can effectively promote the growth of the leech vitality, enhance the anti-stress performance of the leech, unique preparation of leech special feed with the nutrition requirements of law of the leech, nutrient is reasonable, and can enhance the leech constitution, can effectively improve the yield and quality of the leech. In the end under the action of the steps, the method of the invention can effectively increase the output and quality of the leech, wherein the output can be raised by 30% the left and the right, leech in antithrombin activity is enhanced, the use of a relatively high value.

Mode of execution

Embodiment 1

A leech breeding method, comprises the following steps:

(1) build a breeding cage:

In the breeding building breeding cage, cage long 5m, wide 2m, high 1m, the material of the cage 80 the purpose of which is arranged on the net, the net cage bottom even laying a layer of graphite silica;

(2) culture pond is set:

In the breeding after disinfection to into the river, and the algae pond planted on the surface of the water, cultivation of pond area 1/2;

(3) put in the seedlings:

Selecting an individual heavy is 0.6 - 0.8g/strip of leech seedling, first put into the mass fraction is 2% salt soaked in water solution of 2min, after taking out the to 750/sq m section of the stocking density for the net;

(4) feeding management:

The total mass of the daily feeding of the leech 14 - 18% of leech special feed, is divided into two times each day feeding, the leech special feed is composed of the following parts by weight of substance: 60 parts of snail meat, 30 parts of clam, 20 parts of fish meal, 8 parts of bone meal, 4 copies of maize meal, 3 copies of soya bean lecithin, 6 parts of skim milk, 2 parts horse oil, 1 parts of sorbitol, 0.1 parts of composite vitamin, 2 portions of glucose, 2 parts of traditional Chinese medicine additive;

(5) water quality management:

Control in the breeding water temperature is 22 - 26 °C, pH value is 7.0 - 7.5, frequently changing the water in order to keep the concentration of hydrogen sulfide in the water is not greater than 0.05 mg/L, the nitrite concentration is not greater than 0.03 mg/L.

Further, step (4) in the composite vitamin contains vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B9, vitamin B12, vitamin C, vitamin D, vitamin E and vitamin K.

Further, step (4) in said Chinese medicinal additive is composed of the following parts by weight of material: 6 parts of nard, 5 parts of licorice, 4 share Ye, 3 share cloth dregs leaf, 2 parts of ginger, 1 parts of Asiatic moonseed rhizome, 2 share China tree skin, preparation method thereof is common after mixing the components, drying and pulverization over 600 mesh form.

Further, step (4) of the leech in special feed preparation method is to prepare each component is mixed after drying and crushing through 200 mesh, then conventional granulation can be.

Embodiment 2

A leech breeding method, comprises the following steps:

(1) build a breeding cage:

In the breeding building breeding cage, cage long 7m, wide 3m, high 1.5m, the material of the cage 80 the purpose of which is arranged on the net, the net cage bottom even laying a layer of graphite silica;

(2) culture pond is set:

In the breeding after disinfection to into the river, and the algae pond planted on the surface of the water, cultivation of pond area 2/3;

(3) put in the seedlings:

Selecting an individual heavy is 0.6 - 0.8g/strip of leech seedling, first put into the mass fraction is 2% salt soaked in water solution of 3min, after taking out the to 750/sq m section of the stocking density for the net;

(4) feeding management:

The total mass of the daily feeding of the leech 14 - 18% of leech special feed, is divided into two times each day feeding, the leech special feed is composed of the following parts by weight of substance: 70 parts of snail meat, 40 parts of clam, 25 parts of fish meal, 12 parts of bone powder, 8 parts of corn flour, 5 parts of soybean lecithin, 8 parts of skim milk, 3 parts horse oil, 2 parts of sorbitol, 0.3 parts of composite vitamin, 4 portions of glucose, 5 parts of traditional Chinese medicine additive;

(5) water quality management:

Control in the breeding water temperature is 22 - 26 °C, pH value is 7.0 - 7.5, frequently changing the water in order to keep the concentration of hydrogen sulfide in the water is not greater than 0.05 mg/L, the nitrite concentration is not greater than 0.03 mg/L.

Further, step (4) in the composite vitamin contains vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B9, vitamin B12, vitamin C, vitamin D, vitamin E and vitamin K.

Further, step (4) in said Chinese medicinal additive is composed of the following parts by weight of material: 10 parts of nard, 8 parts of licorice, 7 share Ye, 5 share cloth dregs leaf, 4 parts of ginger, 3 parts of Asiatic moonseed rhizome, 5 share China tree skin, preparation method thereof is common after mixing the components, drying and pulverization over 600 mesh form.

Further, step (4) of the leech in special feed preparation method is to prepare each component is mixed after drying and crushing through 200 mesh, then conventional granulation can be.

Compared with the embodiment 1

The compared with the embodiment 1 and the embodiment 1 compared with, and in the step (1) to build up when the breeding cage, not in the cage bottom even laying a layer of graphite silica, in addition to the in addition of the steps of the method are the same.

Compared with the embodiment 2

The compared with the embodiment 2 and embodiment 2 compared with, ordinary leech feed substituted leech special feed, in addition to the in addition of the steps of the method are the same.

Control group

The prior of leech cultivation method.

In order to contrast the invention effect, selected as a wavy varieties, respectively the above five method for breeding, continuous culture 100 days, specific breeding contrast data table below 1 shown:

Table 1

Note: in the above table 1 in the yield of a per-refer to leech dry; the antithrombin activity is measured after 60 °C drying processing after the leech of the head of the antithrombin activity.

From the above table 1 it can be seen, the invention cultivation method can effectively enhance the yield of a leech, lifting leech medicinal value, high economic returns.