半干旱牧区天然打草场生产力时空变化及对气候响应分析

毛平平,沈贝贝,丁蕾,朱晓昱,辛晓平,闫玉春,王旭,闫瑞瑞,徐丽君,陈宝瑞

Temporal and Spatial Variation of Productivity and Its Response to Climate in Semi-Arid Pasture of Forage Harvesting Area

MAO PingPing,SHEN BeiBei,DING Lei,ZHU XiaoYu,XIN XiaoPing,YAN YuChun,WANG Xu,YAN RuiRui,XU LiJun,CHEN BaoRui

表1 不同草地类型18年年均草地气候生产潜力

Table 1 18-years average annual climate potential production in different grassland types of cutting pasture

草地类型 Grassland type 温度 t (℃) 降水 p (mm) 蒸散量 v (mm) 由温度决定的植物干物质产量 Wt (g C?m-2?a-1) 由降水决定的植物干物质产量 Wp (g C?m-2?a-1) 由蒸散量决定的植物干物质产量 Wv (g C?m-2?a-1) 气候生产潜力 W (g C?m-2?a-1) 限制因子Limiting factor 草甸草原 Meadow steppe 2.32 368.76 360.41 794.92 647.12 623.09 623.09 V 山地草甸 Mountain steppe 0.77 315.40 319.89 688.27 563.66 545.13 545.13 V 典型草原 Typical steppe 2.47 304.84 364.03 802.22 546.47 565.75 546.47 p 低地草甸 Lowland steppe 1.78 322.70 346.30 756.91 574.74 568.62 568.62 V