Tegza I. M.

 

A. Baitursynov Kostanay State University, Kasakhstan

 

Comparative evaluation of the reproductive qualities of the breed obrak under LLP "Konyspay-Agro"

 

 

Currently, development of specialized cattle-breeding meat recognized as the strategic direction in elimination of defecit of meat products.

Obrak breed is well adapted to extensive production. Animals are characterized by high endurance during traveling long distances, and ability to absorb large amounts of roughage, which is very important in extensive livestock farming [1,2].

                                                                                               

When transporting animals to new climatic conditions, primarily, these effects impact on their reproductive functions. Therefore, the study of the reproductive abilities of animals is one of the main indicators of the suitability of the organism to new environmental conditions.   Scientific and economic experience was held in LLP "Konyspay-Agro" Kamysty, Kostanay region. The object of the study were repairing heifers of the French Aubrac breed, âûðàùåííûå grown under free-range..

In the process of scientific and economic experiment were used materials and zootechnical breeding farm accounting. For an objective evaluation of the results of research, the animals were kept in the same conditions and feeding.

To study the adaptation processes, by contain them with free-range technology, we have formed three groups of 12 animals each. The first group (I) includes a heifer line Kruse, second (II) - heifers line Komeden, in the third (III) - Diamond line heifers aged 15 months.

Heifers were kept in open areas close to  the livestock complex with a free exit from the premises.

One of indicator of the intensity of the growth and development of animals is their live weight. We have analyzed the dynamics of the live weight of heifers French Aubrac breed, from 15 to 18 months with free-range in the stall period.

 

1st Table.  Change in live weight during the period of experiment, kg,

Groups

Live weight at the beginning of the experiment, kg

 Live weight in the end of the experiment, kg

Absolute growth, kg

average daily gain average daily growth,

 g

       1

350,0±4,6

463,3±6,6

113,2±3,6

1258,5±23,2

       2

363,0±5,6*

480,2±6,8**

117,9±2,9**

1310,4±19,6

       3

   374,1±6,8*

    497,5±6,8**

     123,6±3,0**

     1373,3±21,0

Note - The value is valid  at  Ð<0,05; ** – at Ð<0,01; *** 

 

Animals of 3rd group absolute live weight was more than the animals of 1st group at 10.4 kg or 8.4%, and allowed 2d group- 5.7 kg or 4.6%.

          Compared to the breed standard at the end of repair experience heifer the 3d group at 18 months had excess body weight by 3.1%.

Mating animals was a natural and took place in the period from April to June, in order to obtain the winter and early spring calving. Before mating heifers had a good nutritional state and the characteristic of the breed live weight. During the day, bulls were in the pasture with the herd at night separated from their common edge and housed in individual pens where they are fed concentrates. Load on one bull was 20 - 25 uterus. To take into account the origin of the offspring,   led control the mating of animals, by records of individual numbers of male and female in the journal of mating.

Animals of  studied groups  in the new environmental conditions showed different  reproductive quality(The 2d table).

The 2d table - Reproductive features French breed heifers obrak (X±Sx)

Data

Groups

1

2

3

Age in time insemination, days.

577,3 ± 14,32

605,3 ± 17,14**

620,4 ± 19,26**

Live weight in time of insemination, kg

475,4± 11,42

496,5± 14,28**

515,1 ± 13,41***

 

Experimental groups' age at first insemination was highest, it is connected with the fact that French cattle differs late maturation, that is why  mating of these heifers was allowed at a later age.  Because of this, they had a large mass in the first insemination. By Kruze heifers it was 475,4 kg,  with a lag of their peers the  Komeden line 21,1 kg (4,3 %, Ð>0,99). Heifers  of the line Diamant in the first insemination, mating allowed in at a later time and the difference in body weight with 1st and 2d groups  amounted — 39,7 kg (7,7 %, Ð>0,99) and 3,6 kg (30,9 %, Ð>0,999).

List of literature:

1.     Baharev, V.À. Economic-biological features of cattle of Aubrac breed in the Northern Zauralye in their initial acclimatization. / V.À. Baharev //Novosibirsk, 2010. – p.22 .

2.       Vildanov, F.G. Use efficiency of livestock of Aubrac breed for beef production in the conditions of Bashkortostan. / F.G. Vildanov //. Orenburg, 2011. –p.133.

3. http://agrosektor.kz/tag/îáðàê.html