JP3398449B2 - Cattle sexing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sexing cows, and more particularly to a method for sexing cows by adjusting feed components.

[0002]

2. Description of the Related Art In the livestock industry, it is extremely important to systematically breed genetically excellent cattle. In other words, whether a cow is male or female
It was of great significance both pedigreely and economically. However, there has never been a simple method for differentiating male and female cattle when, where, and by anyone, and the establishment of this technology has long been required.

In recent years, for transplantation of a fertilized egg, identification of male and female by DNA, Pacoll method, sperm fractionation method and the like have been known.

[0004]

However, none of the techniques tried so far has a complicated method and operation, the conception rate of artificial insemination is low, and there is no convenient method for anyone, anytime, anywhere.

It is an object of the present invention to provide a simple method for separating male and female cattle having a high conception rate, which solves the above problems.

[0006]

Means for Solving the Problems The method for differentiating male and female cattle according to the present invention, which has achieved the above-mentioned object, is potassium (K), calcium (Ca), phosphorus ( P) and magnesium (M
g) is the nutrient composition ratio formula (♀) 2.5 ≧ K / (Ca /
P + Mg)> 2.5 (♂) and the daily amount of free arginine (♀) ≧ about 15 g>
In the range of (♂), adjust the daily amount of calcium (Ca) to be (♀) ≧ about 4g> (♂),
It is characterized in that the prepared feed is continuously administered to cows for 10 to 14 days before mating.

In the present invention, the Japanese standard feed ingredient table is
According to the Ministry of Agriculture, Fisheries and Agriculture, Forestry and Fisheries Technology Conference (1987 edition). Calcium (C
a), potassium (K), magnesium (Mg), and phosphorus (P) are element conversion measurement values. In the feed, compounds,
For example, it may be present in the form of calcium carbonate, calcium phosphate, calcium chloride, potassium chloride, magnesium chloride, magnesium sulfate, potassium chloride, potassium phosphate and the like. Arginine is also free arginine.

In the present invention, the method of feeding the food by flushing is one of the feeding methods performed by cattle and sheep to improve the growth rate. It is said that the susceptibility of the cattle becomes stronger and the conception rate improves ("Dictionary of Animal Husbandry" (Company), Japan Society of Animal Husbandry). Usually, it is a feeding method in which a layer of the feed that the livestock prefers to preferentially form is formed higher on the maintenance feed that is always present in the feed box.

[0009] In the present invention, the nutrient composition ratio of the feed and the daily feed of the nutrients to be fed to the cows that are normally bred are calculated based on the Japanese Standard Component Table. That is, the nutritional component composition ratio is set to 2.5 or more when seeking a female and less than 2.5 when seeking a male according to the number 1 derived from the experiments by the present inventors.

[0010]

[Equation 1] Nutrition component composition ratio formula: (♀) 2.5 ≧ K / (Ca
/P+Mg)>2.5 (♂)

On the other hand, the daily amounts of free arginine and calcium to be calculated from the formulas 2 and 3 are about 15 g or more for free arginine and about 4 g or more for calcium when seeking females. . On the other hand, when a male is sought, the amount of free arginine is less than about 15 g, and the amount of calcium is less than about 4 g.

[0012]

[Equation 2] Free arginine supply formula per day: (♀)
≧ about 15g> (♂)

[0013]

[Formula 3] Calcium supply formula per day: (♀) ≧ about 4g> (♂)

When the feed used does not satisfy the above-mentioned conditions, it is corrected by using a drug consisting of calcium carbonate, calcium phosphate, calcium chloride, potassium chloride, magnesium chloride, magnesium sulfate, potassium chloride, potassium phosphate and the like.

The administration of the feed formulated according to the invention is
It is preferable to place it on the maintenance feed in the feeding box and use the flushing administration method so that the cow preferentially eats, but it can be administered in another feeding box or the maintenance feed in the feeding box is excluded. Can also be administered alone.

[0016]

[Action] Although the mechanism of male and female cattle segregation action in the present invention is not clear yet, from the experimental results, the maternal environment of the fed feed is digestible crude protein (DCP), total digestible nutrients (TDN), It is highly probable that females will be born with a high probability because of minerals, amino acids, and nutrient components. That is, it is considered that X spermatozoa quickly acquire fertility in a highly nutritive environment than Y sperm, and in the case of undernutrition, Y sperm have a higher probability of acquiring fertility, resulting in sexual bias. .

[0017]

Example: Female feeds F1 to F6 and male feeds M7 to M
Eight zones were prepared in the amounts shown in Table 1 using the following feeds. F1: corn, milo, bran, soybean meal, flaxseed meal, fish soluble, tallow complex (T.
C) Chemical feed, salt, calcium phosphate. F2: F1 + Fusuma. F3: F1 + soybean meal F4: fish meal (reference example) F5: fish meal, soybean meal F6: fish meal, soybean meal, wheat cake M7: F1 + wheat bran M8: F1

[0018]

[Table 1] After the test feeds in the amounts shown in Table 1 were administered to cows in estrus before fertilization for 14 days by the flushing administration method,
Artificial insemination. Table 2 shows the nutritional component composition ratio and the male / female discrimination result according to the number 1 of each test plot.

[0019]

[Table 2]

In a natural state, the birth ratio between males and females is about 1: 1, but as is clear from Table 2, the nutrient composition ratio shown in Formula 1 is 2.5 or more, and free amino acids per day are F fed a feed of 15 g or more and calcium of 4 g or more
Females are born with a high probability in the 1 to F6 compartments, the nutrient composition ratio shown in Formula 1 is less than 2.5, free amino acids are less than 15 g,
In the M7 to M8 compartments to which the feed containing less than 4 g of calcium was administered, the birth rate of females was low and males were born with a high probability.

[0021]

EFFECTS OF THE INVENTION According to the present invention, when a Japanese standard feed ingredient table is provided, anyone can easily separate male and female cattle when and where. As a result, it promotes breeding and genetically economically superior traits as quickly as possible and contributes to improvement and breeding of cattle.

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Claims (2)

(57) [Claims] 1. Potassium (K), calcium (Ca) in the Japanese standard feed ingredient table, depending on the sex to be acquired
Phosphorus (P) and magnesium (Mg) are added to the nutrient composition ratio formula (♀) 2.5 ≧ K / (Ca / P + Mg)> 2.5
In the range shown in (♂), and the daily supply of free arginine is (♀) ≧ about 15g> (♂), the daily supply of calcium (Ca) is (♀) ≧ about 4g>
A method for differentiating males and females of cows, which comprises preparing the range of (♂) and then continuously administering the prepared feed to the cows for 10 to 14 days before mating. 2. The method for sexing cows according to claim 1, wherein the administration is flushing administration.