| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
n*,1*,2
* Departament de Ciencia Animal i dels Aliments, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
Sheep and Goat Research Department, Animal Production Research Institute, 4 Nadi El-Said St., 12311 Dokki, Giza, Egypt
Corresponding author: G. Caja; e-mail:
gerardo.caja{at}uab.es.
The effects of once (1X) vs. twice (2X) daily milking throughout lactation on milk yield, milk composition, somatic cell count (SCC), and udder health were studied in 32 Murciano-Granadina dairy goats. Goats were assigned at wk 2 of lactation to two treatment groups; once daily milking at 0900 (1X, n = 17), or twice daily milking at 0900 and 1700 (2X, n = 15). Milk yield was recorded weekly until wk 28, and milk composition and SCC were evaluated for each individual udder half at each milking at wk 2 and 4 of lactation and then, monthly until the end of the experiment. Once daily milking resulted in an 18% reduction in the yield of 4% fat-corrected milk compared to twice daily milking (1.61 vs. 1.95 L/d, respectively). This reduction was more marked from wk 2 to 12 than in mid and late lactation. Response to milking frequency also varied according to parity number where goats of less than four parities suffered more milk yield losses during 1X than older goats. Milk of 1X goats contained higher percentages of total solids (13.6 vs. 12.9%), fat (5.10 vs. 4.62%) and casein (2.57 vs. 2.35%) than milk of 2X goats, but milk protein percentage did not differ between treatments (3.28 vs. 3.20%). Yields of total solids, fat, protein and casein tended to be higher for 2X than 1X. Milk SCC did not differ between treatments. We conclude that application of once daily milking in Murciano-Granadina dairy goats moderately reduced milk yield without negative effects on milk composition and udder health. Losses in milk yield would be reduced if 1X is practiced during mid- or late lactation and in older goats. An increase in labor productivity and a higher farmer’s standard of living is also expected.
Key Words: once daily milking • milk production • somatic cell count • dairy goat
Abbreviation key: 1X = once daily milking, 2X = twice daily milking, FIL = feedback inhibitor of lactation, TJ = tight junction
This article has been cited by other articles:
|
|
 |
|
  V. Castillo, X. Such, G. Caja, R. Casals, E. Albanell, and A. A. K. Salama Effect of Milking Interval on Milk Secretion and Mammary Tight Junction Permeability in Dairy Ewes J Dairy Sci, July 1, 2008; 91(7): 2610 - 2619. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Ait-Saidi, G. Caja, S. Carne, A. A. K. Salama, and J. J. Ghirardi Short Communication: Comparison of Manual Versus Semiautomatic Milk Recording Systems in Dairy Goats J Dairy Sci, April 1, 2008; 91(4): 1438 - 1442. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 P. G. Marnet and M. Komara Management systems with extended milking intervals in ruminants: Regulation of production and quality of milk J Anim Sci, March 1, 2008; 86(13_suppl): 47 - 56. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. K. Salama, G. Caja, E. Albanell, S. Carne, R. Casals, and X. Such Mammogenesis and Induced Lactation With or Without Reserpine in Nulliparous Dairy Goats J Dairy Sci, August 1, 2007; 90(8): 3751 - 3757. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Capote, A. Arguello, N. Castro, J. L. Lopez, and G. Caja Short communication: Correlations between udder morphology, milk yield, and milking ability with different milking frequencies in dairy goats. J Dairy Sci, June 1, 2006; 89(6): 2076 - 2079. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. K. Salama, G. Caja, X. Such, R. Casals, and E. Albanell Effect of Pregnancy and Extended Lactation on Milk Production in Dairy Goats Milked Once Daily J Dairy Sci, November 1, 2005; 88(11): 3894 - 3904. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. K. Salama, G. Caja, X. Such, S. Peris, A. Sorensen, and C. H. Knight Changes in Cisternal Udder Compartment Induced by Milking Interval in Dairy Goats Milked Once or Twice Daily J Dairy Sci, May 1, 2004; 87(5): 1181 - 1187. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Ayadi, G. Caja, X. Such, and C. H. Knight Effect of Omitting One Milking Weekly on Lactational Performances and Morphological Udder Changes in Dairy Cows J Dairy Sci, July 1, 2003; 86(7): 2352 - 2358. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
