Abstract:Seasonal changes of Puccinellia tenuiflora shoot calorific values have three peaks which reduced grogresivdy and the greatest value appeared in early May.The calorific values of stem,leaf,inflorescence and dead standing were irregular in growth season.The greatest values of and leaf appeared in early May,inflorecenc in the middle July and dead standing in early August.The lowest values of stem and inflorecence appeared in early July,leaf in early June,and dead standing in the middle July.In whole growth sea...