连续耕作对荒漠绿洲农田土壤无机氮含量和硝化过程的影响
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王丽莎, 戴伊婷, 王川, 陈龙飞, 何志斌
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Responses of soil inorganic nitrogen and nitrification to continuous cultivation in desert oasis farmlands in the Hexi Corridor
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Lisha Wang, Yiting Dai, Chuan Wang, Longfei Chen, Zhibin He
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表1 不同采样点土壤理化性质
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Table 1 Soil physicochemical properties across different sampling plots
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| 样地 | SMC /% | BD /(g·cm-3) | Sand /% | pH | EC /(g·kg-1) | NH-N /(mg·kg-1) | NO-N /(mg·kg-1) | TN /(g·kg-1) | SOM /(g·kg-1) | DOC /(mg·L-1) |
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| 自然沙地 | 4.2±0.8c | 1.7±0.02a | 95.0±1.4a | 8.6±0.1a | 1.0±0.01a | 2.4±0.3c | 0.6±0.1c | 0.1±0.0c | 4.9±0.4c | 2.6±0.4c | | 新农田 | 10.4±1.5b | 1.5±0.03b | 78.4±2.5b | 8.4±0.1ab | 1.0±0.01a | 63.6±3.7b | 3.5±0.2b | 0.5±0.0b | 16.0±1.6b | 22.4±2.4b | | 老农田 | 13.6±1.6a | 1.4±0.02c | 64.4±3.8c | 8.2±0.1b | 1.1±0.01a | 92.4±3.4a | 4.5±0.3a | 0.9±0.1a | 21.5±1.0a | 30.0±3.5a |
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