风沙活动对人工梭梭（Haloxylon ammodendron）林土壤碳氮含量的影响

马全林, 尚雯, 王新友, 马婧, 詹科杰, 王多泽

Influence of sand blown activity on soil organic carbon and total nitrogen in artificial Haloxylon ammodendron plantations in arid desert regions

Quanlin Ma, Wen Shang, Xinyou Wang, Jing Ma, Kejie Zhan, Duoze Wang

表1 民勤人工梭梭林演替变化特征

Table 1 Succession dynamics of the artificial sand-fixing Haloxylon ammodendron forest in Minqin County

指标 沙地造林年限/a CK （白刺灌丛） 0 3 10 25 35 梭梭种群密度/(株?hm-2) 0.0±0.0d 2 125.0±55.4a 650.0±67.1b 625.0±55.9b 400.0±31.6c 0.0±0.0d 梭梭种群高度/cm 0.0±0.0e 103.2±9.1d 315.1±13.7a 172.5±8.9c 216.7±26.0b 0.0±0.0e 梭梭种群盖度/% 0.0±0.0d 20.7±1.3b 29.0±2.5a 14.1±2.1c 10.7±0.4c 0.0±0.0d 植被盖度/% 7.6±2.1d 22.2±1.1b 30.3±3.1ab 18.1±2.5bc 23.3±5.2b 36.8±6.4a 梭梭种群盖度所占比例/% 0 93.2 95.7 77.9 45.9 0 物种丰富度 2 4 8 8 12 9