不同放牧条件下锡林郭勒典型草原土壤水分分布特征及降水入渗估算

李晋波,姚楠,赵英,范庭,张建国,兰志龙,易军,司炳成

Characteristics of soil water distribution and evaluation of recharge rate under different grazing history in the Xilin Gol Steppe

LI Jin-Bo,YAO Nan,ZHAO Ying,FAN Ting,ZHANG Jian-Guo,LAN Zhi-Long,YI Jun,SI Bing-Cheng

表1 处理基本情况

Table 1 Basic characteristics of the sampling plots

特征 Characteristic 1979年以来禁牧 Ungrazed since 1979 1999年以来禁牧 Ungrazed since 1999 持续放牧 Continuously grazed 面积 Area (hm2) 24 35 40 海拔 Altitude (m) 1259 1274 1273 地理坐标 Geographic coordinates 43.55° N, 116.65° E 43.55° N, 116.67° E 43.55° N, 116.66° E 土壤有机质含量 Soil organic matter content (g·kg-1, 0-10 cm) 55.31 49.65 38.70 坡度 Slope (°) 2.7-3.0 2.6-3.0 2.7-2.9 容重 Bulk density (g·cm-3) 4-8 cm 1.14 1.15 1.30 18-22 cm 1.39 1.26 1.43 30-34 cm 1.44 1.33 1.43 40-44 cm 1.43 1.31 1.46 地上生物量 Aboveground biomass (g·m-2) 26.33 22.29 0.81 植被覆盖度 Vegetation coverage (%) 41 48 4 优势种 Dominant species 羊草、黄囊薹草、羽茅、大针茅等 Leymus chinensis, Carex korshinskyi, Achnatherum sibiricum, Stipa grandis et al. 黄囊薹草、羊草、大针茅、根茎冰草等 Carex korshinskyi, Leymus chinensis Stipa grandis, Agropyron michnoi et al. 羊草、黄囊薹草、糙隐子草、大针茅等 Leymus chinensis, Carex korshinskyi, Stipa grandis, Cleistogenes squarrosa et al.