LACTATION TREND OF MILK SOLID-NOT-FAT IN TWO-BREED CROSSES OF CATTLE AT AN ORGANIZED FARM

Article Id: ARCC1552 | Page : 12-16
Citation :- LACTATION TREND OF MILK SOLID-NOT-FAT IN TWO-BREED CROSSES OF CATTLE AT AN ORGANIZED FARM.Indian Journal Of Animal Research.2009.(43):12-16
C.L. Suman
Address : Agricultural Research Information System Cell, Computer Centre, Indian Veterinary Research Institute, Izatnagar-243122 (India)

Abstract

The milk solid-not-fat (SNF) averaged to 8.54±0.01, 8.50±0.01 and 8.65±0.02 per cent respectively
in Holstein Friesian x Hariana (FH), Brown Swiss x Hariana (BH) and Jersey x Hariana (JH) crosses
of cattle and showed significant (P0.01) effect of month of lactationand season of calving. The
observed trend revealed that milk SNF decreased successively after calving to its lowest levels during
fifth month and increased thereafter at subsequent months of lactation in two-breed crosses of cattle.
The gamma type function in FH and JH groups and quadratic function in BH group were adjudged
as best representative nonlinear models explaining lactation trend of milk SNF in two-breed crosses
of cattle. The fitted models to least squares means at ten monthly points of lactation described the
decreasing trend of milk SNF after calving to lowest levels of 8.40, 8.34 and 8.52 percent at 4.36, 5.78
and 4.89 months of lactation in FH, BH and JH groups respectively and increasing trend thereafter
during the lactation in close agreement to its observed trend in two-breed crosses of cattle

Keywords

Milk Solid-not-fat Holstein friesian Brown swiss Jersey Cattle.

References

  1. Dubey, P.C. et al. (1997). Indian J. Anim. Sci., 67(9):802-804.
  2. Duncan, D.B. (1955). Biometrics, 11:1-42.
  3. Harvey, W.R. (1966). Least Squares Analysis of Data with Unequal Sub-class Number. United States Department of Agriculture, Agricultural Research Service, Washington, DC.
  4. Nelder, J.A. (1966). Biometrics, 22:128-141.
  5. Prasad, S. and Singh, Ramkaran (2001). Indian Vet. Med. J., 25:133-136.
  6. Sikka, L.C. (1950). J. Dairy Res., 17:231-252.
  7. Snedecor, G.W. and Cochran, W.G. (1967). Statistical Methods, 6 th edition Oxford and IBH Pub Co Calcutta.
  8. Suman, C.L. et al. (2003). Indian Vet. Med. J., 27:307-310.
  9. Wood, P.D.P. (1976). Animal Prod., 22:35-40.

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