CN110631952A - A kind of determination method of the breeding value of mud cockles fatness degree - Google Patents

Abstract

The invention discloses a method for determining the breeding value of cockroach fatness. The main points of the technical solution include the following steps: step 1, weighing cockles; step 2, leveling the balance; step 3, buoyancy calculation; step 4, data Record; step 5, breeding calculation: the buoyancy of the object in the water is equal to the volume of the discharged water, that is, the volume of the measured object is obtained V _n =V _row = F _n /(ρ×g), and then calculate through the breeding calculation formula, The cockroach fatness breeding value is equal to (1.85‑M _n /V _n )/0.4*100. The present invention indirectly reflects its plumpness by measuring the individual density of the slug, converts the individual density into a breeding value, and then reflects the character of the individual plumpness through the breeding value, which facilitates the selection and breeding of the clam's character. The determination process does not lead to the death of the cockles and can reflect the effect of its plumpness.

Description

A kind of determination method of the breeding value of mud cockles fatness degree

technical field

The invention relates to the technical field of aquaculture, and in particular relates to a method for determining the breeding value of the fatness and fullness of mud cockles.

Background technique

Mud clams, belonging to the phylum Molluscs, Bivalves, Dentidae, Colamidae, Colamella. Chinese traditional farmed shellfish. It is distributed all over the coastal areas of China, and the spawning period from August to October is the peak production season. In addition, Hebei, Shandong, Zhejiang, Fujian and Guangdong all carry out artificial breeding, and the output is quite large. Mud clam meat is delicious and can be eaten fresh or in wine or dried. The clam meat contains a lot of protein and vitamins. Mud clams, belonging to the phylum Molluscs, Bivalves, Dentidae, Colamidae, Colamella. Chinese traditional farmed shellfish. Local names: Grain cockles, blood cockles, blood snails, Walongha.

In the research on the character selection of cockles, the proportion of the edible part weight to the total weight (fullness) is a very important economic trait. However, direct measurement of this trait in mud cockles requires removal of the edible part from the shell, which leads to the death of the subject, which is no longer suitable for use in the selection process for the trait.

Through the measurement of a large number of samples, we found that when the overall density of the cockles was higher, the proportion of the edible part weight in the total weight was smaller. Therefore, a method that does not lead to the death of cockles and can reflect their plumpness is proposed.

SUMMARY OF THE INVENTION

Aiming at the deficiencies in the prior art, the present invention provides a method for determining the breeding value of the plumpness of the clam, which indirectly reflects the plumpness by measuring the individual density of the clam, converts the individual density into the breeding value, and then converts the individual density into the breeding value. Through the breeding value reflecting the traits of individual plumpness, it has the effect of facilitating the selection and breeding of the characteristics of the slugs.

In order to achieve the above object, the invention provides the following technical solutions: a method for measuring the plumpness and breeding value of a slug, comprising the following steps:

Step 1, the cockles are weighed: the electronic balance weighs the measuring objects one by one, obtains the quality M _n of the measuring objects and records them one by one;

Step 2, the balance is leveled; first place the beaker containing water on the electronic balance, then the beaker is immersed in a hollowed-out measuring container, the upper end of the measuring container is connected to the iron frame by setting a connecting rope, and the measuring container is suspended in the water and Do not contact the inner wall of the beaker, and then carry out the de-leveling operation of the electronic balance;

Step 3, buoyancy measurement; take out the measurement container from the beaker, then place the measurement object in the measurement container, and re-place the measurement container in the beaker and immerse it in water, and the reading displayed on the electronic balance is the measurement object. The buoyancy Fn;

Step 4, data recording: Repeat steps 2 and 3 until the buoyancy F _n of all test objects is recorded one by one;

Step 5: Breeding calculation: The buoyancy of the object in the water is equal to the volume of the discharged water, that is, the volume of the measured object is obtained V _n =V _row = F _n /(ρ×g), and then calculated by the breeding calculation formula, The fullness breeding value is equal to (1.85-M _n /V _n )/0.4*100, that is, the fullness breeding value of the cockroach is obtained.

The present invention is further provided as follows: in step 1, before the measurement object is weighed, its surface is wiped with absorbent paper to remove excess water on its body surface.

The present invention is further arranged as follows: in step 1, the surface of the measurement object is dried by a dryer before being weighed to remove excess water on its body surface, and the drying temperature of the dryer during the drying process is not greater than 30 degrees Celsius.

The present invention is further provided as follows: in step 2, the capacity of the water in the beaker is set to 500ml and is pure water.

The present invention is further provided as follows: in step 2, the measuring container is set in a spherical structure, and the measuring container includes two matching hemispherical shells, and the two hemispherical shells are set in a metal mesh structure.

The present invention is further provided as follows: one end of the two hemispherical shells is hingedly connected to each other through hinges, the other end is detachably connected to each other by means of a buckle, and the two hemispherical shells are provided with matching connection card slots and connection cards piece.

The present invention is further provided as follows: in step 2, the depth of the lower end of the connecting rope into the water is set to 1cm, and the connecting rope is set to be a thin nylon rope, and the upper and lower ends of the connecting rope are bound to the iron stand and the measuring container respectively. Fixed connection.

The present invention is further provided as follows: in step 5, F _n can be known from the data recorded in step 4, and ρ is the density of water, g is 9.8m/s2, and _Mn can be known from the data recorded in step 1.

To sum up, the present invention has the following beneficial effects:

By measuring the individual density of mud cockles to indirectly reflect its fatness, and converting the individual density into breeding value, and then through the breeding value to reflect the traits of individual fatness, it is convenient for the breeding of mud cockles. Does not cause the cockles to die and reflects the effect of their plumpness.

Description of drawings

FIG. 1 is a process block diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 3 is a schematic view of the structure of the assay container in FIG. 2 .

Reference signs: 1. Electronic balance; 2. Beaker; 3. Measuring container; 4. Connecting rope; 5. Iron stand; 6. Hemispherical shell; 7. Hinge; .

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1, this embodiment discloses a method for determining the breeding value of the plumpness of a slug, as shown in Figures 1 to 3, including the following steps:

Step 1: Weighing the cockles: The electronic balance 1 weighs the measurement objects one by one to obtain the mass Mn of the measurement objects and record them one by one; before the measurement objects are weighed, the surface is wiped with absorbent paper to remove excess body surface. The moisture content of the test object can be ensured by removing excess moisture on the surface with absorbent paper to ensure the accuracy of the quality measurement of the test object;

Step 2, the balance is leveled; first place the beaker 2 containing water on the electronic balance 1, then the beaker 2 is immersed in a hollowed out measuring container 3, and the upper end of the measuring container 3 is connected to each other by setting the connecting rope 4 and the iron frame 5. , the measuring container 3 is suspended in the water and not in contact with the inner wall of the beaker 2, and then the electronic balance 1 is leveled; The measurement container 3 is set in a spherical structure, and the measurement container 3 includes two matching hemispherical shells 6, the two hemispherical shells 6 are set in a metal mesh structure, and the measurement container 3 is used to place the measurement object. The mesh structure is arranged to facilitate the measurement of the volume of the measuring object while avoiding the easy damage of the measuring container 3 and prolonging its service life; one end of the two hemispherical shells 6 is hingedly connected to each other through the hinge 7, and the other end is detachably connected to each other by setting a buckle. , the two hemispherical shells 6 are provided with a matching connection slot 8 and a connection block 9, which is convenient for placing the measurement object inside the measurement container 3; the depth of the lower end of the connection rope 4 into the water is set to 1cm, and the connection rope 4 is set It is a thin nylon rope, and the upper and lower ends of the connecting rope 4 are fixedly connected to the iron stand 5 and the measuring container 3 by means of bundling;

Step 3, buoyancy measurement; take out the measurement container 3 from the beaker 2, then place the measurement object in the measurement container 3, and re-place the measurement container 3 in the beaker 2 and immerse it in water, at this time, the electronic balance 1 displays The reading is the buoyancy Fn of the measured object;

Step 4, data recording: Repeat steps 2 and 3 until the buoyancy Fn of all test objects is recorded one by one;

Step 5, breeding calculation: the buoyancy received by the object in the water is equal to the volume of the discharged water, that is, the volume Vn=V row=Fn/(ρ×g) of the measurement object is obtained, and then the calculation formula is calculated by the breeding calculation formula. The breeding value of degree is equal to (1.85-Mn/Vn)/0.4*100, that is, the breeding value of the cockroach fatness is obtained; Fn is known from the data recorded in step 4, and ρ is the density of water, g is 9.8m/s2, Mn can be seen from the data recorded in step 1, and 100 in the breeding calculation formula is used to convert the measurement result into a numerical range of 0 to 100, which is convenient for data viewing.

The following is the measurement data table of the measurement objects in the breeding process:

Table 1

In Table 1, the total bulk density=total weight/total volume, and we can see from Table 1 that when the overall density value is higher, the proportion of the meat weight in the total weight is smaller, which also confirms that it can pass the measurement The individual density of mud cockles indirectly reflects its fatness, and the individual density is converted into breeding value, and then the trait of individual fatness is reflected by the breeding value.

Embodiment 2, the difference between this embodiment and Embodiment 1 is: in step 1, the surface of the measurement object is dried by a dryer before weighing, to remove excess water on its body surface, and the dryer During the drying process, the drying temperature is not more than 30 degrees Celsius, and drying the measurement objects by the dryer avoids the need to manually wipe one by one in the first embodiment, ensures the accuracy of the quality measurement of the measurement objects, and can improve the removal of the measurement objects. The efficiency of working with excess water on the subject's body surface.

To sum up, the present invention has the following beneficial effects:

By measuring the individual density of mud cockles to indirectly reflect its fatness, and converting the individual density into breeding value, and then through the breeding value to reflect the traits of individual fatness, it is convenient for the breeding of mud cockles. Does not cause the cockles to die and reflects the effect of their plumpness.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention shall be included in the protection scope of the present invention. within.

Claims (8)

1. A method for measuring the tegillarca granosa fertility value is characterized by comprising the following steps:

step one, weighing blood clam: the electronic balance (1) weighs the measured objects one by one to obtain the mass Mn of the measured objects and records the mass Mn one by one;

step two, leveling by a balance; firstly, placing a beaker (2) filled with water on an electronic balance (1), then soaking a hollow measuring container (3) in the beaker (2), connecting the upper end of the measuring container (3) with an iron stand (5) through a connecting rope (4), suspending the measuring container (3) in the water and not contacting with the inner wall of the beaker (2), and then leveling the electronic balance (1);

thirdly, measuring and calculating buoyancy; taking the measuring container (3) out of the beaker (2), then placing the measuring object in the measuring container (3), and placing the measuring container (3) in the beaker (2) again and immersing the measuring container in water, wherein the reading displayed on the electronic balance (1) is the buoyancy Fn of the measuring object;

step four, data recording: repeating the second step and the third step until the buoyancy Fn of all the test objects is recorded one by one;

step five, breeding calculation: and (3) obtaining the volume Vn of the measured object as V row Fn/(rho multiplied by g) by the buoyancy of the object in the water being equal to the volume of the discharged water, and calculating by a breeding calculation formula, wherein the tegillarca granosa fertility breeding value is equal to (1.85-Mn/Vn)/0.4 x 100, and the tegillarca granosa fertility breeding value is obtained.

2. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the first step, the surface of the object to be measured is wiped by absorbent paper before being weighed, so as to remove excessive moisture on the surface of the object.

3. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the first step, the surface of the object to be measured is dried by a dryer before being weighed, excess moisture on the surface of the object is removed, and the drying temperature of the dryer is not more than 30 ℃ in the drying process.

4. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the second step, the volume of water in the beaker (2) is set to be 500ml and is pure water.

5. The method for determining the tegillarca granosa fertility value according to claim 1, wherein in the second step, the determination container (3) is arranged in a spherical structure, the determination container (3) comprises two semispherical shells (6) which are matched with each other, and the two semispherical shells (6) are arranged in a metal mesh structure.

6. The method for measuring the tegillarca granosa fertility value according to claim 5, wherein one end of each of the two half-spherical shells (6) is hinged with each other through a hinge (7), the other end of each of the two half-spherical shells is detachably connected with each other through a buckle, and the two half-spherical shells (6) are provided with a connecting clamping groove (8) and a connecting clamping block (9) which are matched with each other.

7. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the second step, the depth of the lower end of the connecting rope (4) entering water is set to be 1cm, the connecting rope (4) is set to be a thin nylon rope, and the upper end and the lower end of the connecting rope (4) are fixedly connected with the iron support (5) and the measuring container (3) respectively in a binding mode.

8. The method for determining the tegillarca granosa fertility value according to claim 1, wherein in the fifth step, Fn is known from the data recorded in the fourth step, ρ is the density of water, g is 9.8m/s2, and Mn is known from the data recorded in the first step.

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