古尔班通古特沙漠一年生植物的氮吸收策略

侯宝林, 庄伟伟

Nitrogen uptake strategy of annual plants in Gurbantünggüt Desert

HOU Bao-Lin, ZHUANG Wei-Wei

表3 古尔班通古特沙漠两种一年生植物15N回收率(%)(平均值±标准差)

Table 3 15N recovery of two annual plants in Gurbantünggüt Desert (%)(mean ± SD)

回收率 Recovery (%) 角果藜 Ceratocarpus arenarius 6月 June 7月 July 土壤深度 Soil depth (cm) 土壤深度 Soil depth (cm) 0-5 5-15 0-5 5-15 15N-NO3- 0.330 ± 0.070Aab 0.323 ± 0.057Aab 0.423 ± 0.074Aa 0.270 ± 0.036Ab 15N-NH4+ 0.313 ± 0.048Aab 0.223 ± 0.042Bb 0.337 ± 0.051ABa 0.260 ± 0.046Aab 15N-Glyc 0.193 ± 0.029Ba 0.190 ± 0.036Ba 0.237 ± 0.038Ba 0.227 ± 0.032Aa 回收率 Recovery (%) 碱蓬 Suaeda glauca 6月 June 7月 July 土壤深度 Soil depth (cm) 土壤深度 Soil depth (cm) 0-5 5-15 0-5 5-15 15N-NO3- 0.420 ± 0.036Aab 0.290 ± 0.050Bc 0.503 ± 0.067Aa 0.327 ± 0.060ABbc 15N-NH4+ 0.487 ± 0.116Aa 0.493 ± 0.071Aa 0.527 ± 0.047Aa 0.410 ± 0.044Aa 15N-Glyc 0.187 ± 0.021Bb 0.237 ± 0.051Bab 0.287 ± 0.055Ba 0.240 ± 0.036Bab