| 胡宝叶,王贤凤,陈鹭,印亮,雷聪,童月华,易志刚.不同环境因子对南方典型蔗田原位和异位土壤NO通量的影响[J].农业环境科学学报,2016,35(9):1824-1828. |
| 不同环境因子对南方典型蔗田原位和异位土壤NO通量的影响 |
| Effects of different environment factors on NO fluxes from intact and disturbed soils from the typical sugarcane field in Southern China |
| 投稿时间：2016-06-17 |
| DOI：10.11654/jaes.2016-0818 |
| 中文关键词: 一氧化氮 原位土 异位土 温度 含水率 灭菌 |
| 英文关键词: nitric oxide intact soil disturbed soil temperature water content sterilization |
| 基金项目:国家自然科学基金项目（41473083） |
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| 中文摘要: |
| 一氧化氮（NO）对近地表臭氧的形成具有重要作用，土壤生态系统是近地表NO的重要来源之一。土壤水分、温度等环境条件显著影响NO通量。以南方典型蔗田土壤为研究对象，通过室内培养研究不同环境因子（土壤水分、温度等）对原位和异位土壤NO通量的影响。结果表明：原位土壤NO通量显著高于异位土壤，厌氧条件下土壤NO通量显著大于好氧条件；土壤灭菌后NO通量显著降低；当土壤含水率为最大持水量的20%且在厌氧条件下，原位土壤NO通量最大，为24.1 ng N·m-2·s-1。25℃条件下NO释放速率最大。因此土壤NO主要由厌氧条件下的微生物过程产生，较低含水量和最适温度有利于NO的产生。 |
| 英文摘要: |
| Nitric oxide(NO) plays significant roles on the formation of near-surface ozone, and soil ecosystem is one of the important source of the near-surface NO, which is influenced by many factors, such as water content and temperature.This study investigated the effect of different environment factors(soil water content, temperature etc.) on soil NO fluxes in laboratory. Soils were collected from typical sugarcane field in Southern China.The results showed that NO flux of intact soil column was significantly higher than that of disturbed soil column. Soil NO flux under anaerobic condition was significantly higher than that under aerobic condition. NO flux of disturbed soil reduced dramatically after sterilization. The highest NO flux appeared at the soil maximum water holding capacity of 20% for the non -sterilization intact soil column under anaerobic condition, with the value of 24.1 ng N·m-2·s-1, and the highest flux appeared at 25℃. The results demonstrated that the emission of NO from soil was mainly from microbial process under anaerobic condition. Low water content and the optimal temperature would benefit for the soil NO production. |
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