But in 1999, there were two peak values of absolute growth ratio for aboveground biomass of grasses and sedges in cold season pastureland in June and August respectively, and the maximum was in July in warm season pastureland.

• 1999年,冷季草场禾草地上生物量的绝对生长率在6月份和8月份出现了两个峰值,暖季草场禾草地生物量的绝对生长率在7月份达到最大。