SHORT COMMUNICATION
Protein supply and requirement of grazing yak
in China
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1
Qinghai Academy of Animal Science and Veterinary Medicine,
Xining 810003, P.R. China
2
Northwest Institute of Plateau Biology, Chinese Academy of Sciences,
Xining 810003, P.R. China
3
Institute of Animal Nutrition, Sichuan Agricultural University,
Ya’an Sichuan 625014, P.R. China
Publication date: 2007-09-17
Corresponding author
B. Xue
Qinghai Academy of Animal Science and Veterinary Medicine,
Xining 810003, P.R. China
J. Anim. Feed Sci. 2007;16(Suppl. 2):86-91
KEYWORDS
ABSTRACT
Forage supply of native grassland in Qinghai-Tibet Plateau reaches the greatest point in August and
the lowest in the beginning of May. Feed intake of yak reached the greatest point in spring, followed by
winter, and the lowest in autumn. Digestible CP (DCP) requirement (g/d) for maintenance in growing
yak is 6.09 W0.52, and that for gain is (1.1548/DG + 0.0509 W0.52)-1. There is a sever shortage of forage
and CP supply in winter and spring. Grazing yak should be supplemented with 67.4 g/d DCP in the first
cold season and 58.4 g/d DCP in the second cold season for normal growth.
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