grazing method
1.The day-grazing behaviour of yaks was measured with visual observation method under free grazing in summer, autumn and winter pasture in Qinghai Sanjiaocheng Sheep Breeding Farm in August, September and November, 2004. The results showed that the average day-grazing time was (37.45±39.96) minutes in summer season, (301.82±27.91) min in autumn season and (304.57±12.24 )min in winter.
2.The grazing behavior of Alashan Bactrian camel was measured with visual obeservation method under free grazing in Haloxylon ammodendrondesert in the western part of Inner Mongolia Plateau from May to November, 1998 The results showed as follows:(1)Average annual biting time was 550.72±150.44 min/day, and the longest in spring and the shortest in winter;
