秸秆添加量对土壤生物固氮速率和固氮菌群落特征的影响

李旭,董炜灵,宋阿琳,李艳玲,卢玉秋,王恩召,刘雄舵,王萌,范分良

Effects of Straw Addition on Soil Biological N2-Fixation Rate and Diazotroph Community Properties

Xu LI,WeiLing DONG,ALin SONG,YanLing LI,YuQiu LU,EnZhao WANG,XiongDuo LIU,Meng WANG,FenLiang FAN

表1 不同处理的土壤理化性质及生物固氮

Table 1 The physical and chemical properties and biological N2-fixation of soil different treatment

处理 Treatment pH NO3--N (mg·kg-1) NH4+-N (mg·kg-1) TN (g·kg-1) 生物固氮量 Biological N2-fixation (μg N·g-1DW) C0 7.07±0.01ab 15.33±0.26a 11.81±1.07a 1.18±0.01e 2.00±0.18d C1 7.10±0.01a 14.44±0.14b 11.98±0.93a 1.21±0.00cd 2.25±0.05cd C2 7.03±0.02b 13.80±0.09c 11.53±0.77a 1.20±0.01de 2.50±0.11bc C3 7.06±0.03ab 11.25±0.14d 11.77±0.66a 1.24±0.01b 2.78±0.10ab C4 6.96±0.03c 5.97±0.30e 11.13±0.14a 1.23±0.00bc 2.71±0.15ab C5 6.93±0.03c 3.46±0.24f 11.85±0.81a 1.28±0.00a 3.05±0.13a