01605naa a2200205 a 450000100080000000500110000800800410001910000200006024500390008026000090011952010770012865000190120565000210122465000120124565000100125765000100126770000180127770000160129577300880131120921892018-06-04       1980    bl uuuu     u00u1 u    #d1 aTHOMPSON, K. F.  aPasture allowance and lamb growth.  c1980  aGroups of 20 Romney lambs grazing ryegrass/white clover-based pastures were offered allowances of 1, 2, 3, 4, 5 and 6 kg DM/head/ day for 8 or 16 weeks commencing in December, February and April. There were curvilinear relationships between lamb growth rate and pasture allowance. As lamb liveweight increased, growth rates declilied at any given allowance. The implications for.feed budgeting are discussed. Pasture utilization at each grazing was linearly correlated to liveweight gain by the relationship: Growth rate (g/day) = 260 - 2.98 % utilization. The relationship appeared independent of liveweight, and its possible use in grazing management is discussed. Table 1: Groups grazed, duration of periods, and initial liveweight of lambs Table 2: Mean liveweight gain (g/day) and (se) of lambs for the three grazing periods Table 3: Monthly mean (se) standing dm, pasture composition and in vitro digestibility Table 4: Mean pasture utilization %  se) for three allowances for periods 2 and 3; Fig. 1: Relationship between % pasture ufilization and mean growth rate.  aAnimal feeding  aAnimal nutrition  aGrazing  aLambs  aSheep1 aMcEWAN, J. C.1 aRISK, W. H.  tProceedings of the New Zealand Society of Animal Productiongv. 40, p. 85-91, 1980.