草地利用方式对温性典型草原优势种植物功能性状的影响

张景慧, 王铮, 黄永梅, 陈慧颖, 李智勇, 梁存柱

Effects of grassland utilization on the functional traits of dominant plants in a temperate typical steppe

ZHANG Jing-Hui, WANG Zheng, HUANG Yong-Mei, CHEN Hui-Ying, LI Zhi-Yong, LIANG Cun-Zhu

表2 4种优势植物功能性状统计分析(平均值±标准误)

Table 2 Values of different functional traits of four dominant species (mean ± SE)

植物功能性状 Plant functional trait 大针茅 Stipa grandis 羊草 Leymus chinensis 糙隐子草 Cleistogenes squarrosa 冷蒿 Artemisia frigida F p 比叶面积 SLA (m2·kg-1) 8.04 ± 0.23c 9.14 ± 0.41c 15.80 ± 0.83a 14.02 ± 0.40b 42.85 <0.001 叶片干物质含量 LDMC (mg·g-1) 498.11 ± 4.79a 437.91 ± 7.55b 446.91 ± 5.61b 337.67 ± 6.70c 115.03 <0.001 植株高度 VH (cm) 90.69 ± 6.57a 32.74 ± 3.08b 15.63 ± 0.83c 29.27 ± 2.59b 73.51 <0.001 根长 RL (cm) 15.36 ± 0.92ab 13.50 ± 1.47b 17.44 ± 1.00a 11.62 ± 1.85b 3.35 0.031 根冠比 R/S 1.74 ± 0.37b 0.72 ± 0.13b 3.40 ± 0.63a 0.98 ± 0.12b 10.32 <0.001 茎叶比 S/L 0.69 ± 0.41b 0.34 ± 0.06c 0.97 ± 0.16a 0.94 ± 0.16a 2.32 0.094 根碳含量 RCC (mg·g-1) 213.91 ± 18.41d 327.48 ± 15.84b 285.26 ± 10.01c 382.30 ± 9.58a 25.81 <0.001 茎碳含量 SCC (mg·g-1) 430.74 ± 6.61b 420.99 ± 4.37bc 409.31 ± 4.90c 452.30 ± 2.01a 14.63 <0.001 叶碳含量 LCC (mg·g-1) 443.07 ± 1.81ab 433.98 ± 3.34b 415.68 ± 8.34c 449.56 ± 2.72a 9.48 <0.001 根氮含量 RNC (mg·g-1) 5.43 ± 0.56b 5.95 ± 0.52ab 6.11 ± 0.29ab 6.95 ± 0.51a 1.70 0.190 茎氮含量 SNC (mg·g-1) 5.28 ± 0.45c 6.75 ± 0.51bc 10.87 ± 0.71a 6.99 ± 0.45b 19.50 <0.001 叶氮含量 LNC (mg·g-1) 14.21 ± 0.62c 17.61 ± 0.91b 16.05 ± 0.99bc 23.02 ± 0.88a 19.32 <0.001 根纤维素含量 RCE (%) 12.43 ± 1.20c 25.17 ± 0.96a 16.75 ± 1.22b 24.70 ± 2.01a 19.67 <0.001 茎纤维素含量 SCE (%) 34.17 ± 1.61a 31.25 ± 0.69ab 27.86 ± 0.52b 29.93 ± 2.30ab 2.30 0.096 叶纤维素含量 LCE (%) 25.31 ± 0.29a 25.76 ± 0.62a 25.94 ± 0.51a 19.74 ± 1.05b 18.41 <0.001 根木质素含量 RLI (%) 11.47 ± 1.38b 11.64 ± 0.64b 14.00 ± 1.38b 21.42 ± 1.62a 12.71 <0.001 茎木质素含量 SLI (%) 8.24 ± 0.45b 5.06 ± 0.58c 5.38 ± 0.70c 21.59 ± 2.54a 29.43 <0.001 叶木质素含量 LLI (%) 5.47 ± 0.28b 4.27 ± 0.29c 3.01 ± 0.26d 10.64 ± 1.17a 35.53 <0.001