Influence of vacuum level, pulsation ratio and rate on milking performance and udder health in dairy goats

Lu, C.D.; Potchoiba, Michael J.; Loetz, E.

doi:10.1016/0921-4488(91)90025-l

Cited by 22 publications

(9 citation statements)

References 16 publications

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“…In buffaloes, Caria et al (2012) showed that vacuum level did not significantly affect the individual milk production per milking, whereas lower vacuum level resulted in a decrease in AFR and PFR and an increase in effective milking time. In dairy goat, higher vacuum levels increased AFR and PFR, decreased milking time, and elevated somatic cell counts (Lu et al 1991).…”

Section: Discussionmentioning

confidence: 92%

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Effects of vacuum level and pulsation rate on milk ejection and milk flow traits in Tunisian dairy camels (Camelus dromedarius)

Atigui

Marnet

Barmat

et al. 2014

Trop Anim Health Prod

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This work aims to compare the effects of milking at two vacuum levels (38 and 48 kPa) and three pulsation rates (60, 90, and 120 cpm) on milk production and milk flow characteristics. Six multiparous Maghrebi camels in late lactation and once daily milked were used. The best combination of setting for camel's milking was high vacuum and low pulsation rate (48 kPa/60 cpm). Milk yield and average and peak milk flow rate were the highest, while milking time was the shortest using this combination of setting (3.05 ± 0.30 kg, 1.52 ± 0.21 kg/min, 2.52 ± 0.21 kg/min, and 3.32 ± 0.31 min, respectively). Lower vacuum level lengthened milking time by more than 100 % and was not sufficient to extract milk correctly (1.69 to 2.48 times less milk yield harvested), suggesting a negative interaction with the stimulatory effect of pulsation. Higher pulsation rates did not better stimulate the camels and induced more bimodality and lower milk flow rates. Animal characteristics and liner/claw design affect machine milking and further investigations must be carried out to verify their effects and to study long-term effect of high vacuum level on udder health and teat condition.

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Section: Discussionmentioning

confidence: 92%

“…On the contrary to ewes (Peris et al 2003) and goats (Lu et al 1991) where higher pulsation rates better stimulate milk ejection reflex, better massage teats, and improve milking efficiency, camels seem to behave as a cow-like animals and prefer to be milked with low pulsation rate.…”

Section: Discussionmentioning

confidence: 94%

Effects of vacuum level and pulsation rate on milk ejection and milk flow traits in Tunisian dairy camels (Camelus dromedarius)

Atigui

Marnet

Barmat

et al. 2014

Trop Anim Health Prod

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“…In all experiments, milking was performed at a pulsation ratio and pulsation rate shown to be optimal for milking speed and udder health using similar milking equipment for goats of a comparable performance level (Lu et al 1991). The differences in total and main milk yields and corresponding milking times between morning and evening milking were mainly due to different milking intervals.…”

Section: Discussionmentioning

confidence: 99%

Machine milking of dairy goats during lactation: udder anatomy, milking characteristics, and blood concentrations of oxytocin and prolactin

Bruckmaier

Ritter

Schams

et al. 1994

Journal of Dairy Research

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SUMMARY. Forty-four goats were milked and milk flow recorded without or with 1 min manual prestimulation in early, mid and late lactation. Ultrasound measurements of cross sections of the whole mammary gland were performed in a water bath. In additional experiments with 15 goats, milk flow was recorded and frequent blood samples were taken for the determination of oxytocin and prolactin concentrations. Milk yield increased from the first to the third lactation and decreased markedly during the course of lactation. Average and peak milk flow rates were closely related to the actual milk yield. The ultrasound cisternal area was 27-

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“…Over-milking limitation (respectively suppression) may be associated with the reduction of hyperkeratoses (respectively reduction of minor pathogen IMI prevalence), but data concerning over-milking are rather inconsistent; it is probably better tolerated by healthy udders [44]. A vacuum level increase may induce a rise of SCC without clinical IMI [88,140].…”

Section: Environmental Factorsmentioning

confidence: 99%

Mastitis of dairy small ruminants

et al. 2003

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-Staphylococci are the main aetiological agents of small ruminants intramammary infections (IMI), the more frequent isolates being S. aureus in clinical cases and coagulase negative species in subclinical IMI. The clinical IMI, whose annual incidence is usually lower than 5%, mainly occur at the beginning of machine milking and during the first third of lactation. These features constitute small ruminant peculiarities compared to dairy cattle. Small ruminant mastitis is generally a chronic and contagious infection: the primary sources are mammary and cutaneous carriages, and spreading mainly occurs during milking. Somatic cell counts (SCC) represent a valuable tool for prevalence assessment and screening, but predictive values are better in ewes than in goats. Prevention is most often based on milking machine management, sanitation and annual control, and milking technique optimisation. Elimination mainly relies on culling animals exhibiting clinical, chronic and recurrent IMI, and on drying-off intramammary antibiotherapy; this treatment allows a good efficacy and may be used selectively by targeting infected udders only. Heritability values for lactation mean SCC scores are between 0.11 and 0.15. Effective inclusion of ewe's mastitis resistance in the breeding goal has recently been implemented in France following experimental and large scale estimations of genetic parameters for SCC scores.ewe / goat / mastitis / somatic cell count / epizootiology

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Influence of vacuum level, pulsation ratio and rate on milking performance and udder health in dairy goats

Cited by 22 publications

References 16 publications

Effects of vacuum level and pulsation rate on milk ejection and milk flow traits in Tunisian dairy camels (Camelus dromedarius)

Effects of vacuum level and pulsation rate on milk ejection and milk flow traits in Tunisian dairy camels (Camelus dromedarius)

Machine milking of dairy goats during lactation: udder anatomy, milking characteristics, and blood concentrations of oxytocin and prolactin

Mastitis of dairy small ruminants

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