生长季降水格局变化对科尔沁沙地典型生境植物群落结构、功能和地上生物量的影响
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张晶, 左小安, 吕朋
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Effects of changes in growing season precipitation regimes on plant community structure， function and aboveground biomass in typical habitats in the Horqin Sandy Land
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Jing Zhang, Xiaoan Zuo, Peng Lv
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表1 生长季降水格局变化影响下固定沙丘和沙质草地优势物种重要值的变化（平均值±标准误）
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Table 1 Changes in the importance values of dominant species in fixed dune and sandy grassland under the influence of precipitation regime change during the growing season（Means ± SE）
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| 植物种类 | 光合途径 | 生活型 | 重要值/% |
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| 固定沙丘 | 沙质草地 |
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| CK | P60- | P60+ | P100- | P100+ | CK | P60- | P60+ | P100- | P100+ |
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| 锋芒草(Tragus mongolorum) | C4 | 一年生 | 1.51 ± 0.60 | 3.51 ± 1.98 | 1.64 ± 0.70 | 1.21 ± 0.78 | 1.21 ± 0.62 | | | | | | | 狗尾草(Setaria viridis) | C4 | 一年生 | 12.78 ± 3.63 | 6.56 ± 1.82 | 11.29 ± 2.02 | 5.57 ± 1.40 | 13.27 ± 4.20 | 2.04 ± 1.01b | 12.77 ± 5.99a | 6.08 ± 3.22ab | 5.93 ± 1.98ab | 6.87 ± 1.49ab | | 虎尾草(Chloris virgata) | C4 | 一年生 | 2.69 ± 1.42b | 6.68 ± 3.23ab | 6.13 ± 2.71ab | 15.62 ± 6.62a | 5.07 ± 3.67ab | | 3.17 | | | | | 画眉草(Eragrostis pilosa) | C4 | 一年生 | 5.12 ± 0.90a | 3.26 ± 0.47ab | 5.08 ± 1.58a | 1.37 ± 0.68b | 3.34 ± 1.38ab | 1.19 ± 0.79 | 2.64 ± 1.56 | 0.37 ± 0.37 | | 1.47 ± 0.94 | | 黄蒿(Artemisia scoparia) | C3 | 一年生 | 31.20±1.86 | 36.43±3.13 | 38.12 ± 4.61 | 44.94 ± 7.34 | 43.22 ± 8.75 | 31.11 ± 9.02 | 36.22 ± 6.95 | 28.16 ± 6.90 | 33.22 ± 6.55 | 23.73 ± 7.53 | | 蒺藜(Tribulus terrestris) | C4 | 一年生 | | 1.05 ± 0.24 | | 3.47 ± 1.84 | | | | | 2.27 ± 1.19 | | | 尖头叶藜 (Chenopodium acuminatum) | C4 | 一年生 | 7.94 ± 2.70b | 17.97±2.57a | 5.42 ± 1.37b | 8.43 ± 1.98b | 4.10 ± 1.42b | 4.58 ± 1.69 | 6.23 ± 2.06 | 6.66 ± 3.38 | 5.16 ± 4.70 | 7.16 ± 1.32 | | 太阳花 (Erodium stephanianum) | C3 | 一年生 | 7.46 ± 2.56 | 6.71 ± 3.02 | 3.04 ± 1.67 | 4.55 ± 1.36 | 6.48 ± 1.84 | 7.07 ± 4.46 | 6.47 ± 4.11 | 12.62 ± 4.32 | 10.54 ± 3.99 | 5.44 ± 1.85 | | 猪毛菜(Kali collinum) | C4 | 一年生 | 1.58 ± 1.50 | 1.84 ± 0.47 | | 1.93 ± 1.22 | 1.25 ± 0.89 | | 6.15.52 ± 2.88 | 4.12 ± 1.72 | 4.42 ± 2.11 | | | 白草 (Pennisetum centrasiaticum) | C3 | 多年生 | 3.14 ± 3.14 | | 1.63 ± 1.63 | 4.00 ± 4.00 | 1.50 ± 1.50 | 17.97 ± 7.20 | 13.42 ± 6.34 | 9.88 ± 4.65 | 16.35 ± 3.76 | 13.20 ± 7.38 | | 糙隐子草 (Cleistogenes squarrosa) | C4 | 多年生 | 9.67 ± 1.33a | 1.19 ± 0.76b | 10.33 ± 2.27a | 2.20 ± 0.84b | 11.06 ± 1.49a | 26.17 ± 1.36a | 10.12 ± 4.72b | 15.85 ± 5.31ab | 10.03 ± 2.22b | 26.28 ± 5.86a | | 芦苇(Phragmites australis) | C3 | 多年生 | 5.18 ± 3.35 | 4.06 ± 4.06 | 3.17 ± 2.04 | 1.64 ± 1.64 | | | | 1.23 ± 1.23 | | | | 沙葱(Allium mongolicum) | C3 | 多年生 | 7.42 ± 2.73a | 6.37 ± 1.21ab | 4.83 ± 1.06ab | 2.65 ± 1.20b | 5.93 ± 0.81ab | | | | | 1.58 ± 1.58 | | 达乌里胡枝子 (Lespedeza davurica) | C3 | 灌木 | 1.49 ± 0.76 | | 2.87 ± 2.03 | | 1.70 ± 0.73 | 4.77 ± 3.93 | 5.61 ± 2.73 | 12.37 ± 4.74 | 6.66 ± 2.71 | 12.24 ± 5.46 | | 总物种数 | | | 18 | 19 | 23 | 16 | 17 | 12 | 12 | 13 | 14 | 13 |
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