荒漠绿洲过渡带人工梭梭（Haloxylon ammodendron）林下草本植物演替特征

王国华, 张晓颖, 王佳琪, 申长盛

Succession of the herbaceous layer in Haloxylon ammodendron woodland in a desert-oasis ecotone of the Hexi Corridor

Guohua Wang, Xiaoying Zhang, Jiaqi Wang, Changsheng Shen

表4 人工梭梭林下3种优势一年生草本植物生物量与土壤理化指标之间的相关关系

Table 4 Correlations between biomass and soil physicochemical properties in the three dominant annual herbs

物种 土壤理化指标（x） 拟合曲线方程 R2 P 沙蓬 电导率 y=-0.002x2+0.336x-13.049 0.589 0.045 含水量 y=-23.924x2+39.424x-14.142 0.637 0.029 pH y=1.07x-6.994 0.018 0.715 无机碳 y=-1.257x2+10.198x-19.011 0.332 0.244 有机碳 y=-0.131x2+1.188x-1.293 0.175 0.510 全氮 y=10.91x2-10.637x+3.424 0.358 0.212 全磷 y=598.543x2-314.178x+41.986 0.149 0.568 全钾 y=0.192x2-6.799x+61.127 0.033 0.889 水解性氮 y=0.001x2+0.020x-0.083 0.317 0.264 有效磷 y=0.008x2-0.238x+2.310 0.204 0.451 速效钾 y=0.003x2-0.520x+25.418 0.270 0.332 Cl- y=-0.002x2+0.556x-39.621 0.200 0.458 HCO3- y=-0.065x+5.815 0.098 0.698 Na+ y=0.00005667x2-0.009x+1.383 0.005 0.982 Ca2+ y=-0.042x2+0.521x-0.444 0.001 0.996 雾冰藜 电导率 y=-0.001x2+0.174x-6.967 0.622 0.033 含水量 y=-3.101x2+5.13x-1.002 0.613 0.036 pH y=0.598x-3.832 0.008 0.817 无机碳 y=0.987x2-8.813x+20.069 0.736 0.018 有机碳 y=0.963x2-5.892x+9.399 0.768 0.012 全氮 y=-5.467x2+3.755x+0.264 0.170 0.571 全磷 y=-33.807x2+29.221x-4.956 0.302 0.341 全钾 y=0.061x2-2.432x+24.419 0.716 0.023 水解性氮 y=0.001x2+0.009x+0.408 0.218 0.478 有效磷 y=-0.011x2+0.238x-0.185 0.331 0.300 速效钾 y=0.092x-4.532 0.241 0.437 Cl- y=0.036x-0.699 0.265 0.397 HCO3- y=-0.036x+2.57 0.286 0.363 Na+ y=-0.038x+2.434 0.508 0.119 Ca2+ y=-0.026x2+0.166x+0.638 0.198 0.516 白茎盐生草 电导率 y=-0.001x2+0.160x-8.201 0.680 0.019 含水量 y=-9.129x2+15.328x-5.229 0.584 0.046 pH y=-3.281x+25.425 0.225 0.197 无机碳 y=1.543x2-13.975x+32.159 0.506 0.121 有机碳 y=-0.133x2+0.943x-0.789 0.041 0.882 全氮 y=-6.963x2+5.108x-0.053 0.028 0.919 全磷 y=303.944x2-177.117x+26.423 0.100 0.729 全钾 y=-0.244x2+8.774x-78.036 0.232 0.453 水解性氮 y=0.003x2-0.125x+1.916 0.029 0.915 有效磷 y=0.007x2-0.164x+1.14 0.404 0.212 速效钾 y=0.027x-0.352 0.127 0.665 Cl- y=-0.00004078x2-0.01x+3.366 0.229 0.458 HCO3- y=-0.084x+4.098 0.429 0.186 Na+ y=-0.00008733x2+0.023x-0.405 0.196 0.519 Ca2+ y=0.029x2-0.723x+4.911 0.140 0.637