Milkability Evaluation of Jersey Dairy Cows by Lactocorder

Abstract

Since there is not enough data about milkability of the Jersey cows, the aim of this paper is to show basic milkability traits of this cattle breed depending on the parity and milk flow curve types. Cows had average daily production (DMY) of 22.23 kg, milk yield per milking (MYM) of 9.72 kg, and average and maximum milk flow about 1.66 and 2.49 kg/min, respectively. Statistical analysis showed that DMY and MYM of the cows in 4th parity was significantly (p<0.05) higher comparing to cows in 1st and 3th parity. The duration of entirely milking is similar regarding the paritiesand only the cows in 3th and 4th differ significantly (p<0.05). Regarding the effect of milk flow curve, the significant (p<0.05) difference between unspecified and rectangular milk flow curve has been found for the average milk flow (AMF) and descending phase of the milk flow curve (TD). Cows with unspecified milk flow curve, have significantly (p<0.05) lower AMF and longer TD compared to cows with rectangular curve. Cows with bimodal milk flow curve have significantly (p<0.05) longer duration of the ascending phase compering to: unspecified, descending and rectangular. The results of this study have shown that Jersey cows have lower production and milk flow compared to other dairy cattle breeds. Nonetheless, they have uniform milkability traits, and a large representation of desirable milk flow curves which are associated with a beneficial effect on the udder health.

Study of Milkability and Its Relation With Milk Yield and Somatic Cell in Mediterranean Italian Water Buffalo

“…The frequencies of curve types ( Table 2 ) resembled findings on Jersey cows ( 30 ); in this study, about 66% of curves were rectangular and descending. In a field study carried out on 497 Holstein cows ( 31 ), 59.4% of total curves were those with a gradual or continuous decrease phase, similar to the percentage (59.53%) of the present study (type 2, type 3, and type 6).…”

“…Presence of long BT increases management costs and mastitis risk as a result of tissue stress and may indicate suboptimal udder pre-milking stimulation. In other species, it has been demonstrated that the reduction of BT is essential to improve udder health, longevity, and milking efficiency ( 30 , 32 , 33 ).…”

Machine Milkability of Dromedary Camels: Correlation between Udder Morphology and Milk Flow Traits

“…With a daily milk yield ranging between 1.70 to 10.20 kg and peak milk flow rate ranging between 0.43 and 4.95 kg/min, these animals showed a great array for selection. Mean peak and average milk flow rates recorded for our dairy camels were lower than those recorded also by Lactocorder ® in dairy Holstein cows [45,46] but range within the values reported in Jersey cows [47]. With higher milk yield/milking (9.72 ± 2.98 kg) and longer milking duration (5.71 ± 2.34 min and 9.94 ± 2.23 min for main milking duration and total milking duration) these authors registered 2.49 ± 0.57 kg/min and 1.66 ± 0.36 kg/min, respectively, for peak and average milk flow rates.…”

“…While parity affected significantly milk yield/ milking, peak and average milk flow rates, lactation stage had no effect on the above traits in the studied group. Similarly, significant effect of parity was reported on milkability traits [29] but also a significant effect of lactation stage was reported [47]. Time to milk ejection registered for our dairy camels was less than a minute without udder manual stimulation nor calf presence.…”

Milkability differences based on lactation peak and parity in Holstein cattle

“…Milk flow curves are affected by parity, DIM, maximum milk flow, and most importantly, by pre-milking operations (Sandrucci et al, 2007). Bobić et al (2020) state that dairy cows with a bimodal milk flow curve had significantly lower average milk flow and longer descending phase of the milk flow curve.…”