3Savory A, Parsons L D. The Savory grazing method[J].Rangelands, 19 80,2 : 234.
4Heady H F, Michael D PITT. Seasonal versus continuous grazing on annual vegetation of Northern California [J].Rangelands, 1979,6 : 2 31.
5Hoveland C S, mccann Hill N S. Rotational vs continuous stoching of beef cows and calves on mixed endophte-Free tall fescue-bermudagrass pasture [J]. J prod Agrie, 1997,10(2) :245.