Year 2022, Volume 7, Issue 1
| Year : | 2022 |
| Volume : | 7 |
| Issue : | 1 |
| Authors : | Valentin FOKSHA, Alexandra KONSTANDOGLO, Vera GRANATCH, Igor AKBASH, Vasily KURULYUK |
| Title : | PRODUCTIVITY DYNAMICS AND RELATIONSHIP BETWEEN QUANTITATIVE AND QUALITATIVE INDICATORS IN COWS OF THE HOLSTEIN BREED |
| Abstract : | The article presents the results of a study of the milk productivity of Holstein cows in the dynamics of lactations, correlation between the level of milk yield, fat content, and the amount of milk fat, live weight and milk ratio. The studies were carried out in the herd of the breeding farm of SLL (Society of limited liability), „Doksancom” on Holstein cows in the dynamics of 4 lactations. A comparative analysis of the yield of cows in the dynamics of lactations showed that during the second lactation, milk productivity was 934 kg of milk, the third - 959 kg of milk, the fourth - 1527 kg of milk more than in the first lactation, the difference being significant at P <0.01, P <0.05 and P <0.001, respectively. The lactation curve of all analyzed cows of the Holstein breed of the herd of SLL „Doksancom” changed with a certain regularity and had a leveled character, characterized by a high stable type. The relationship between milk yield and the percentage of fat in milk of cows of first-fourth lactation was in negative correlation from weak (-0.187, second lactation), moderate (-0.338 – -0.486, first-fourth lactation) to noticeable (-0.557, third lactation). A negative correlation in the entire analyzed animal population was found between milk ratio and live weight, ranging from mild -0.018 to moderate -0.334. This will allow further selection of highly productive cows in the herd with an optimal live weight for the Holstein breed. |
| For citation : | Foksha, V., Konstandoglo, A., Granatch, V., Akbash, I., Kurulyuk, V. (2022). Productivity dynamics and relationship between quantitative and qualitative indicators in cows of the Holstein breed. AGROFOR International Journal, Volume 7. Issue No. 1. pp. 106-114. DOI:10.7251/AGRENG2201106F |
| Keywords : | milk productivity, fat content, lactation, live weight, correlation. |
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ISSN 2490-3434 (Printed)
ISSN 2490-3442 (Online)
ISSN 2490-3442 (Online)
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