人工草地土壤有机碳组分与微生物群落对施氮补水的响应
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徐梦,徐丽君,程淑兰,方华军,卢明珠,于光夏,杨艳,耿静,曹子铖,李玉娜
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Responses of Soil Organic Carbon Fractionation and Microbial Community to Nitrogen and Water Addition in Artificial Grassland
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XU Meng,XU LiJun,CHENG ShuLan,FANG HuaJun,LU MingZhu,YU GuangXia,YANG Yan,GENG Jing,CAO ZiCheng,LI YuNa
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表5 水氮处理下土壤PLFA含量、酶活性及SOC组分相对变化量的相关性分析
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Table 5 Pearson correlation coefficient (r) of relative changes (Δ) in PLFA concentration, enzyme activity and SOC fractions under N and water addition
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项目
Item | 全部处理 All treatments | | 不补水 No water addition | | 补水 With water addition | | Coarse POC | Fine POC | POC | MAOC | Coarse POC | POC | MAOC | Coarse POC | Fine POC | POC | MAOC | | 土壤微生物量 Soil microbial biomass | | | | | | | | | | | PLFA总量
Total PLFA | — | 0.424* | 0.486* | -0.657** | | — | 0.554? | -0.679* | | — | 0.679* | 0.534? | -0.767** | 革兰氏阳性细菌
G+ | — | 0.426* | 0.461* | -0.628** | | — | 0.520? | -0.616* | | — | 0.682* | — | -0.781** | 革兰氏阴性细菌
G- | 0.390? | 0.366? | 0.435* | -0.629** | | — | 0.538? | -0.772** | | — | 0.585? | — | -0.635* | | 真菌 Fungi | — | 0.419* | 0.498* | -0.623** | | — | 0.574? | -0.660* | | 0.585? | 0.564? | 0.550? | -0.733* | 丛枝菌根真菌
AMF | 0.464* | 0.378? | 0.508* | -0.632** | | — | 0.558? | -0.710* | | 0.617* | 0.627* | 0.563? | -0.596? | | 土壤酶活性 Extracellular enzyme activity | | | | | | | | | | | | βG | — | — | — | — | | -0.642* | — | 0.685* | | — | — | -0.709* | — | | CB | — | — | — | — | | -0.651* | — | 0.711* | | — | — | -0.748* | — | | 土壤酶化学计量比 Enzyme stoichiometric ratio | | | | | | | | | | | | βG/NAG | — | — | — | — | | — | — | — | | — | — | -0.581? | — | | CB/NAG | — | — | — | — | | -0.691* | — | 0.607? | | — | — | -0.540? | — | | βG/AP | — | -0.463* | -0.476* | 0.404? | | — | — | — | | — | -0.797** | -0.821** | — | | CB/AP | — | — | — | — | | — | — | 0.572? | | — | -0.572? | -0.667* | — |
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