| 刘进,潘月鹏,师华定.华北地区农田土壤镉来源及大气沉降的贡献[J].农业环境科学学报,2022,41(8):1698-1708. |
| 华北地区农田土壤镉来源及大气沉降的贡献 |
| Atmospheric deposition as a dominant source of cadmium in agricultural soils of north China |
| 投稿时间：2021-12-11 |
| DOI：10.11654/jaes.2021-1438 |
| 中文关键词: 镉 农田土壤 源清单 大气沉降 华北地区 |
| 英文关键词: cadmium（Cd） agricultural soil source inventory atmospheric deposition north China |
| 基金项目:国家重点研发计划项目（2016YFD0800302） |
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| 摘要点击次数: 986 |
| 全文下载次数: 1145 |
| 中文摘要: |
| 为研究农田土壤重金属镉（Cd）的来源，采用源清单法统计了华北地区（北京、天津、河北和山东）大气沉降、灌溉水、畜禽粪便、化肥施用和市政污泥5种途径对农田土壤Cd的输入量。结果表明：2005—2009年华北农田土壤Cd的输入量范围为1.56~2.63 mg·m-2·a-1，其中灌溉水输入贡献最大（63.0%），其次为大气沉降（30.9%）、畜禽粪便（5.2%）、化肥施用（0.6%）和市政污泥（0.3%）。2015—2019年华北农田Cd的输入量减小为0.22~0.35 mg·m-2·a-1，其主要来源变为大气沉降，贡献占比56.5%；灌溉水、畜禽粪便、化肥施用和市政污泥占比分别为13.7%、23.8%、3.9%和2.1%。除了化肥施用，其他4种源的Cd输入量在过去15 a中均呈现不同程度的下降趋势，大气沉降取代灌溉水成为近年来华北地区农田土壤Cd的主要来源。 |
| 英文摘要: |
| An inventory of Cd inputs to agricultural soils in north China during 2005-2019 is presented, which states the major sources including atmospheric deposition, sewage sludge, livestock manures, inorganic fertilizer, and irrigation water. Across the four major cropland areas in Beijing, Tianjin, Hebei, and Shandong, irrigation water was the main source of Cd accumulation during the period 2005- 2009, accounting for 63.0% of total inputs(1.56~2.63 mg · m-2 · a-1), followed by atmospheric deposition(30.9%), livestock manures (5.2%), inorganic fertilizers(0.6%), and sewage sludge(0.3%). However, a decade later, total Cd inputs to agricultural soils in the target region significantly reduced to 0.22~0.35 mg · m-2 · a-1. During 2015-2019, atmospheric deposition became an important source, responsible for an estimated 56.5% of total Cd inputs, followed by livestock manure(23.8%), irrigation water(13.7%), inorganic fertilizers (3.9%), and sewage sludge(2.1%). These findings suggested that the major source of Cd in agricultural soils shifted from irrigation water to atmospheric deposition during the past 15 years. |
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