Influences of Grazing on Nutrition Content,Digestibility of Deyeuxia angustifolia

Three kinds of grazing intensity—light(0.87 cattle/hm2),moderate(1.42 cattle/hm2) and heavy(1.94 cattle/hm2) were set,taking the ungrazed site as the control,the effect of grazing intensity on crude protein,crude fat,ADF,NDF,Ca,P and digestibility of Deyeuxia angustifolia were investigated in the second year of grazing experiment.The result showed that the crude protein content of Deyeuxia angustifolia in heavy grazing area was significantly higher than that in light and moderate grazing area at the mid-late period of grazing season(August,September)(P0.05).The influences of grazing on crude fat content of Deyeuxia angustifolia will express mainly after July,the crude fat content in the ungrazed area and light grazing area were significantly higher than that in moderate grazing area(P0.05),and the content in moderate grazing area was significantly higher than that in heavy grazing area(P0.05).in latter grazing season(September),the content of NDF,ADF of Deyeuxia angustifolia in ungrazed area were significantly higher than that in grazing area(P0.05);grazing had no influences on the content of Ca,P of Deyeuxia angustifolia.The digestibility of Deyeuxia angustifolia in the grazing area was higher than that in the ungrazed area(P0.05).There was no significant difference in the digestibility of Deyeuxia angustifolia among different grazing intensity areas in the whole grazing period.