Eyad alkhaled(1), Samouil Moussa(2) and Khaled Najjar(1)

(1) livestock Research Department, General Commission for Scientific Agricultural Research/ GCSAR, Damascus, Syria

(2) Department of Animal Production, Faculty of Agriculture, Damascus University, Damascus, Syria.

(*Corresponding author: Eyad alkhaled. E-Mail: eyadalkhaled1968@yahoo.com)

Received: 17/01/2019 Accepted: 23/02/2020

Abstract

34 Shami cows were used in Deir Al-Hajar Research Station to breed Shami cows to analyze the data of the udder dimensions during the year 2019 to know the effect of the morphological specifications of the udder in the milk production of the Shami cows in Syria and to estimate the phenotypic relationships between the udder dimensions with each other and with the total milk production. The results showed that there was a significant effect (0.05≥p, 0.001≥p) of the arrangement of the mother’s lactating cow season in milk production with the development of the production stage and total milk production, where the average total milk production was 1264.71 ± 87.19 kg and 10.90 ± 0.40 kg / day and 7. 90 ± 0.90 kg / day and 4.04 ± 0.70 kg / day according to the development of the productive stage, and the results showed a significant effect (P <0.01) of the arrangement of the mother’s cow season in the characteristics of the length, width, depth, circumference and size of the udder for the ewe and with the development of the productive stage where Multi-season cows (more than one season) through the fourth year outperformed the first season’s cows, the highest of which was the fourth season’s cows, and in terms of measuring height On the ground, the first season cows outperformed the multi-season cows. The results also showed a significant effect (P <0.01) of the cow season’s ranking in total milk production, the highest of which was the fourth season’s cows (1352 ± 26.53 kg), and the lowest of the first and second season cows reached (1197 ± 22.72, 1163 ± 26.53 kg) respectively. The results indicated that there was a correlation relationship (P <0.01) between the characteristics of the udder measurements of the length, width and circumference of the udder before and after milking and the mean lengths, widths and circumferences of the udder, with the total amount of milk, as it reached (r = 0.50, r = 0.26, r = 0.41), (r = = 0.20, r = 0.30, r = 0.25), (r = 0.21, r = 0.30, r = 0.25) respectively, and the results showed a correlation relationship (P <0.01) between the length of the udder and measurements of width, depth, circumference, and size of the udder before and after preparing Milking and average these measurements with each other.

Keyword: Shami cows, Udder dimensions, Total and daily milk intake, Syria

Full paper in Arabic: PDF