特殊用法conservative grazing1.适度放牧continuous grazing1.连续放牧deferred grazing1.延迟放牧normal grazing1.正常放牧periodic grazing1.周期放牧premature grazing1.早熟牧草rotational grazing1.循环放牧cyclic grazing1.循环放牧rough grazing1.粗放牧, 粗草场放牧