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2 环境因子与土壤固氮微生物丰度、多样性和固氮速率的相关性分析

Table 2 The correlations between environmental factors and abundance, diversity and N2-fixation rate of soil diazotroph community

nifH基因拷贝数 nifH copy numbers 固氮速率 N2-fixation rate 香农-威尔指数 Shannon-Wiener index R P R P R P 秸秆添加Straw addition 0.708 0.000 0.804 0.000 -0.634 0.002 NO3--N -0.737 0.000 -0.828 0.000 0.621 0.002 NH4+-N -0.166 0.508 0.019 0.929 0.054 0.851 TN 0.483 0.027 0.598 0.003 -0.340 0.144 pH -0.623 0.002 -0.410 0.073 0.678 0.001