Method for selecting first-calf heifers for milking herd

FIELD: animal science.

SUBSTANCE: the present innovation deals with dynamic loading onto cardio-vascular system in animals. Selection should be carried out by the following parameters: , ΔT3 and Δn, where ΔT1 - the time for pulse increase at running, ΔT2 - the time for pulse stabilization after running, ΔT3 - the time for pulse increase after running, Δn - the increase of pulse frequency after running. One should select animals into milking herd at the following values; ΔT3 ≤ 10 sec, Δn ≤ 10 beats/min. The method enables to present perspective evaluation of lactation capacity in animals.

EFFECT: higher efficiency of selection.

1 dwg, 1 ex, 1 tbl

 

The invention relates to the field of animal husbandry, in particular for prospective evaluation of lactational ability of young animals.

Lactational ability of an animal, such as cow, depends not only on the breed, but also to a large extent on the state of the cardiovascular system. It is known that the formation of each liter of milk through monoketone organs of the animal must be at least three hundred liters of blood. The heart must cope with emerging workloads, which is possible in normal operation. Thus, lactational ability of the animal caused by the condition of his heart and cardiovascular system in General. Testing of calves on the state of the cardiovascular system will allow the most purposefully distribute animals at an early age for dairy and beef herds with subsequent appropriate feeding and care.

There is a method of physical training of athletes, which consists in specifying the dynamic load on the cardiovascular system until the desired frequency of the pulse and reception of the received parameters in the form of a graph [1]. The proposed method shows the features of the heart and does not give sufficient information about the state of the cardiovascular system in General. It aims to improve the health of the ri training with a certain heart rate, which is not applicable to animals.

Closest to the claimed method is the early assessment of dairy cows productivity by conducting biological test associated with the determination of viscosity of fresh venous blood [2]. Using this method is difficult because of the complexity of determining the viscosity and the availability of special equipment.

The problem to address with the claimed method, and the technical result from its use involve the selection at an early stage of development the most productive calves to create in the future vysokoreaktsionnogo herd.

The method of selection of heifers for dairy herd includes dynamic load on the cardiovascular system until the desired heart rate and graphic registration of the received parameters, schedule, perform temporary with two branches, ascending branches which reflect the increase in pulse rate to achieve the desired frequency, descending - the decline of the pulse frequency to the initial value. Lactational capacity determined by comparing the ascending and descending branches of the graph.

The method of selection of heifers for dairy herd differs from existing methods because the animal is forced to move at a constant speed by measuring the pulse rate and the time to reach them identify elenai value, then, the animal stopped, measure the time of lowering the heart rate to normal, the ratio of these indicators and make a conclusion about the prospects of the animal.

The method is simple to use and does not require material costs and additional equipment may be recommended veterinary nurse.

To explain the inventive method presents a plot of the frequency of the pulse time and the table of results, which built the graph.

Testing carried out, forcing the animal to run in a circle at a certain speed (100 m/min). On the body of the animal fix the microphone is connected by a wire attached to the leash, phone experimenter. Every 10 seconds Jogging measure heart rate. Upon reaching 140 beats per minute, the movement of the animal stopped, and the measurement of the frequency of the pulse will continue as long as he is not normal.

The results build a graph of pulse rate from time to time.

Assessment of the lactational function produced by three indicators:

that ΔT3that Δn

where- time stabilization of the pulse after the termination of the run (ΔT2to the rise time of the pulse when running (ΔT1); ΔT3in EMA rise of the pulse after the termination of the run; Δn - the heart rate increases after cessation of running.

Values ofnot more than 3; ΔT3no more than 10 sec; Δn is not more than 10 beats per minute testify to the good condition of the cardiovascular system. According to the indicators of these conditions produce the culling of animals. If all indicators of the animal in the norm, then it is recommended in the dairy herd; if you do not meet one or two indicators, the animal was recommended in the beef herd; if all three indices do not satisfy these conditions, then the animal is discarded.

The method of selection of heifers for dairy herd allows to obtain very important information about the cardiovascular system of an animal in stress mode.

Example. Hot brunette No. 433 five months of black-motley breed. Testing was carried out as follows. On the neck of the heifers was wearing a collar with an eight-metre leash (for convenience of calculations, because the circumference is approximately 50 m). The leash was attached with a flexible electric wire. In the area of the lower jaw was set microphone with a piece of adhesive tape (you can install a microphone in the other place, in which bugged cardiac pulse wave, for example, if the area or the anus). Using wire microphone was connected to a frequency counter CE is Dechen cuts.

Assistant, driving the girl with the whip caused her to flee in a circle, the radius of which is the leash.

The initial heart rate was 70 beats per minute running speed of 100 m/min

After every 10 runs produced metering pulse.

Reportedly built a graph of pulse rate from time to time.

These heifers are all indicators are normal. Therefore, it can be recommended in the dairy herd.

Sources of information

1. Inventor's certificate SU 1351576 A1, CL And 61 In 5/02, 1983

2. Inventor's certificate SU 1630738 A1, class And 01 To 67/02, 1991

Table
The dependence of the frequency of the pulse time
Time in secondsHeart rate, beats per minuteTime in secondsHeart rate, beats per minuteTime in secondsHeart rate, beats per minute
0707014014090
10727513615084
20808012516080
309090 11817078
409510011218075
5011511010519072
6013012010120070
6513713093  

The method of selection of heifers for dairy herd by conducting biological test, characterized in that as a biological test using dynamic load on the cardiovascular system of an animal, and the selection of heifers carried out on three indicators:

Δ T2/Δ T1 Δ T3and Δ n

where Δ T2/Δ T1 is the time of stabilization of the pulse after the termination of the dynamic load (Δ T2to the rise time of the pulse under dynamic load (Δ T1);

Δ T3the rise time of the pulse after the termination of the dynamic loads;

Δ n - the heart rate increases after cessation dynamic loads;

in dairy herd selected animals with indicators; Δ T2/Δ T1≤ 3; Δ T310, Δ n≤ 10-kick is in a minute.



 

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FIELD: animal science.

SUBSTANCE: the present innovation deals with dynamic loading onto cardio-vascular system in animals. Selection should be carried out by the following parameters: , ΔT3 and Δn, where ΔT1 - the time for pulse increase at running, ΔT2 - the time for pulse stabilization after running, ΔT3 - the time for pulse increase after running, Δn - the increase of pulse frequency after running. One should select animals into milking herd at the following values; ΔT3 ≤ 10 sec, Δn ≤ 10 beats/min. The method enables to present perspective evaluation of lactation capacity in animals.

EFFECT: higher efficiency of selection.

1 dwg, 1 ex, 1 tbl

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