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Machine milking parameters for Murciano-Granadina breed goats.

Authors
  • Fernández, N1
  • Martí, J V2
  • Rodríguez, M2
  • Peris, C2
  • Balasch, S3
  • 1 Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 València, Spain. Electronic address: [email protected] , (Spain)
  • 2 Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 València, Spain. , (Spain)
  • 3 Departamento de Estadística e Investigación Operativa Aplicadas y Calidad, Universitat Politècnica de València, 46022 València, Spain. , (Spain)
Type
Published Article
Journal
Journal of Dairy Science
Publisher
American Dairy Science Association
Publication Date
Jan 01, 2020
Volume
103
Issue
1
Pages
507–513
Identifiers
DOI: 10.3168/jds.2019-16446
PMID: 31629519
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

In dairy ruminants, the combination of milking parameters must ensure good milking performance without harming udder conditions. Commonly, milking conditions for goats are established without having checked the admissible limits for optimal and fast milking. The aim of this study was to establish a limit combination of machine milking parameters that improves machine milking performance without altering milkability or udder status. To this end, we studied the effect of 2 combinations (42 kPa, 120 cpm, 60% vs. 44 kPa, 120 cpm, 60% in terms of kilopascals of vacuum level, cycles per minute of pulsator rate, and percentage of pulsator ratio, respectively) on milk production and composition, milk fractioning during milking, SCC, teat tissue thickness variation after milking, and the milk emission kinetics parameters throughout 1 lactation period (6 mo). The 42 and 44 kPa measured at the vacuum gauge level became average values of 37.5 and 39.3 kPa, respectively, measured at the teat sphincter level during milking. Milk flow significantly increased and total milking time decreased 25 s with the elevation of the vacuum level from 42 to 44 kPa without any adverse effect on milk fractioning at milking. However, the use of 44 kPa also showed an increase in tissue thickness above 5%, and we observed a tendency of average conductivity of milk to increase, although without any adverse effect on SCC. It seems that 44 kPa, 120 cpm, 60% is a possible limit combination of parameters to improve milking performance without altering milkability or udder conditions. We concluded that this combination can be used for milking Murciano-Granadina breed goats in conditions similar to those of this study (mid-level milking system and 1 milking/d), although further studies are necessary to verify its application in the case of 2 milkings/d. Copyright © 2020 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.

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