Abstract:The experiment of plant growth analysis of Kobresia humilis meadow community was conducted in the region of Haibei Alpine Meadow Ecosystem Research Station(37°29′~37°45′N.,101°12′~101°33′E;EL.3200m).The series of data were fitted with cubic polynomial exponential growth curves.The results indicated(1):The change of LAI was S type,the growth course can be divided into three periods,which was corresponded to the phenological periods of plants of sedges in K.humilis meadow.From June to the first te...