| 施肥类型和水热变化对农田土壤氮素矿化及可溶性有机氮动态变化的影响 |
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| 引用本文： | 田飞飞,纪鸿飞,王乐云,郑西来,辛佳,能惠.施肥类型和水热变化对农田土壤氮素矿化及可溶性有机氮动态变化的影响[J].环境科学,2018,39(10):4717-4726. |
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| 作者姓名： | 田飞飞 纪鸿飞 王乐云 郑西来 辛佳 能惠 |
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| 作者单位： | 中国海洋大学环境科学与工程学院;中国海洋大学海洋环境与生态教育部重点实验室 |
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| 基金项目： | 国家自然科学基金重点项目（41731280）；国家重点研发计划项目（2016YFC0402810） |
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| 摘 要： | 为了揭示土壤水分、温度和添加不同氮肥对大沽河流域农田土壤氮素矿化的影响,设置对照(CK)、添加尿素N 120mg·kg~(-1)(Ur)和添加尿素N 36 mg·kg~(-1)+有机肥(相当于添加N 120 mg·kg~(-1),UM)这3个处理进行为期84 d的室内恒温培养实验,实验共设3个培养温度(15、25和35℃)和3个水分梯度60%、75%和90%田间持水量(WHC)].结果表明,施肥类型和培养温度对土壤氮素矿化速率、累积矿化量和氮潜在矿化势(N0)均具有显著影响(P0.01).与CK处理相比,Ur和UM处理的矿化速率和累积矿化量分别增加了1.46~8.17和2.00~8.15倍.各施肥处理的土壤氮矿化速率和累积矿化氮量随温度升高而增加,且各温度梯度之间差异均达到显著水平(P0.05).与未施肥处理相比,Ur和UM施肥处理均能够显著提高土壤中可溶性有机氮(SON)的含量,且施肥处理土壤中SON含量与氮素累积矿化量之间有显著负相关关系,表明SON作为一个不可忽视的组分,参与了土壤氮素矿化过程.升高温度能显著提高土壤中SON的矿化速率和矿化强度,但水分对各处理土壤的SON无显著影响.此外,施肥处理显著降低了土壤氮矿化的温度敏感性(Q10)(P0.05),尿素配施有机肥处理的土壤的氮矿化温度敏感系数最低(Q10=1.01),说明配施有机肥显著降低了土壤氮素矿化速率对温度变化响应的强度,这有利于减缓高温条件下矿质氮的释放速率,并提升作物对氮素的利用效率.
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| 关 键 词： | 有机肥 氮素矿化 水分 可溶性有机氮 温度敏感性(Q10) |
| 收稿时间： | 2018/1/4 0:00:00 |
| 修稿时间： | 2018/4/16 0:00:00 |
Effects of Various Combinations of Fertilizer, Soil Moisture, and Temperature on Nitrogen Mineralization and Soluble Organic Nitrogen in Agricultural Soil |
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| TIAN Fei-fei,JI Hong-fei,WANG Le-yun,ZHENG Xi-lai,XIN Jia and NAI Hui.Effects of Various Combinations of Fertilizer, Soil Moisture, and Temperature on Nitrogen Mineralization and Soluble Organic Nitrogen in Agricultural Soil[J].Chinese Journal of Environmental Science,2018,39(10):4717-4726. |
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| Authors: | TIAN Fei-fei JI Hong-fei WANG Le-yun ZHENG Xi-lai XIN Jia and NAI Hui |
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| Institution: | College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China,College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China,College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China,College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China,College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China and College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China |
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| Abstract: | |
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| Keywords: | organic fertilizer soil nitrogen mineralization soil moisture soluble organic nitrogen temperature sensitivity (Q10) |
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