{
  "abstract": "目的农田减排固碳是“双碳”战略背景下的重要发展方向，但干旱绿洲农田生态系统碳循环特征及其环境调控机制尚缺乏充足的认识，阻碍了干旱区农田生态系统碳汇的科学评估。方法以宁夏沿黄绿洲农田为例，基于涡度相关系统开展连续2 a的通量观测，分析该生态系统多时间尺度的碳循环特征，利用随机森林模型（RF）、结构方程模型（SEM）和Michaelis-Menten模型等研究碳循环关键过程对环境因子的响应机制。结果1）小麦-玉米间作农田生态系统年净生态系统碳交换（NEE）在-286.29~-223.42 g/（m²·a）（以C计），生长季强烈的光合固碳过程显著超过呼吸碳排放，从生态系统年尺度的碳循环来看，其表现出一定的碳吸收能力。2）生长季的NEE日动态呈“U”形特征，显著受总初级生产力（GPP）的倒“U”形日内过程控制，但生态系统呼吸（Reco）的日内波动较小，且对NEE影响不大。3）土壤含水量（SWC）和光合有效辐射（PAR）影响光合固碳强弱，适宜的SWC和PAR使光合固碳增强，SWC和土壤温度（Ts）驱动呼吸碳排放大小。4）气候干湿变化显著调控干旱绿洲农田碳循环过程，降水偏低与气温偏高的气候异常导致饱和水汽压差（VPD）升高和SWC降低，通过生物物理因子的直接和间接耦联途径影响碳通量各组分，最终抑制生态系统的碳汇能力。结论PAR、SWC、Ts等生物物理因子及气候干湿变化，通过直接与间接耦合作用共同调控干旱绿洲农田生态系统碳循环与碳汇能力，明晰干旱绿洲间作农田碳汇关键影响机制，为干旱绿洲区的农业减排固碳提供基础科学依据。",
  "abstract_shown": true,
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  "article_type": null,
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  "author_total": 7,
  "authors": [
    {
      "name": "张瑞瑞"
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    {
      "name": "杜灵通"
    },
    {
      "name": "姜旭阳"
    },
    {
      "name": "乔成龙"
    },
    {
      "name": "薛斌"
    },
    {
      "name": "施光耀"
    },
    {
      "name": "蔡茹瑾"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/awnr4d3sahzjc.bib",
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  "doi": null,
  "fulltext_url": "http://www.stbcxb.com.cn/zh/article/doi/10.13870/j.cnki.stbcxb.2026.05.028/",
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  "licence_label": "CC BY-NC-ND",
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  "openalex": null,
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  "published": "2026-10-24",
  "publisher": "Editorial Department of Journal of Soil and Water Conservation",
  "ris": "https://research.draconitic.com/paper/awnr4d3sahzjc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T13:44:45Z",
      "native_id": "7900e5fb774c4b9c84b195a1c5e96a33",
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  "subjects": [
    {
      "field": "earth",
      "origin": "lcc:GE1-350",
      "subfield": "environmental-science"
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  ],
  "title": "宁夏沿黄绿洲小麦-玉米间作农田生态系统碳循环特征及调控机制",
  "title_text": "宁夏沿黄绿洲小麦-玉米间作农田生态系统碳循环特征及调控机制",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:44:45Z",
  "url": "https://research.draconitic.com/paper/awnr4d3sahzjc",
  "venue": "Shuitu Baochi Xuebao",
  "versions": []
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