Lignin was used as endogenous markero It was showed that the dry matter intake of forage(DMIF) was 6.80-75.2 g/w0.75 and there was no apparent difference between wether and ewe(p>0.05);

• 补料明显影响绵羊的放牧采食量(p<0.；01)；羯羊和空怀母羊的放牧采食量无明显差异(p>0