紫云英季土壤固氮微生物对外源碳氮投入的响应
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杨璐,曾闹华,白金顺,周兴,周国朋,高嵩涓,聂军,曹卫东
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Responses of Soil Diazotroph Community to Rice Straw, Glucose and Nitrogen Addition During Chinese Milk Vetch Growth
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Lu YANG,NaoHua ZENG,JinShun BAI,Xing ZHOU,GuoPeng ZHOU,SongJuan GAO,Jun NIE,WeiDong CAO
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表3 外源碳、氮添加对土壤固氮微生物nifH基因拷贝数及α-多样性的影响
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Table 3 Diazotroph nifH gene copy number and α-diversity as affected by rice straw, glucose, and nitrogen addition
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处理
Treatment | nifH 基因拷贝数
nifH Copy number (×106·g-1 soil) | 物种数目
Observed species | Chao 1指数
Chao 1 value | 香农指数
Shannon index | | CK | 80.4±7.7b | 1506±41ab | 1958±62b | 8.30±0.09a | | Rs | 140.5±33.3ab | 1557±21a | 2101±34a | 8.42±0.02a | | RsN1 | 120.3±20.1ab | 1456±39bcd | 1838±60bc | 8.29±0.09a | | RsN2 | 114.5±24.6ab | 1383±12d | 1783±41c | 8.17±0.05ab | | Glc | 167.8±16.5a | 1420±13cd | 1915±21b | 7.98±0.17b | | GlcN1 | 116.2±28.2ab | 1439±10bcd | 1904±16bc | 8.20±0.07ab | | GlcN2 | 119.7±26.4ab | 1483±35abc | 1934±41b | 8.38±0.08a |
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