潘鹏飞,潘飞燕,张海旭,金裕

• 1:河南省轨道交通智能安全工程技术研究中心
• 2:长安大学地质工程与测绘学院
• 3:西安工程大学理学院

摘要(Abstract)：

【目的】研究旨在探讨2000年实施生态修复政策以来，渭河流域净初级生产力的演化特征，揭示气候变化与人类活动对植被生态的综合作用机制，为流域生态保护与可持续发展提供理论依据。【方法】基于GEE云平台，调用MOD17A3HGF6.1数据，分析NPP、CPP和VPG三类净初级生产力的时空分布格局。通过构建六种植被变化情景，探讨气象因子和人类活动对植被变化的驱动模式，并结合最小二乘回归分析法、Pearson相关系数和贡献指数对各影响因子进行定量评估。【结果】(1)2000—2023年间，渭河流域NPP在年内呈单峰型季节性变化，年际增幅为9.91 gC·m~(-2)·a~(-1),空间分布呈现“南高北低”的格局。(2)在植被恢复过程中，气温和降水与植被生长呈正相关，相关系数分别为0.26和0.43;太阳辐射在以人类活动为主导的植被恢复中呈轻度正相关，相关系数为0.12;人口密度和道路密度对约34.77%的植被恢复区域起促进作用。(3)在植被退化过程中，降水对植被退化的贡献度为30.43%,人口密度和道路密度对植被退化的相关系数分别为0.71和0.64。【结论】研究期间，渭河流域NPP整体呈增长趋势，气温、降水、人口密度和道路密度对NPP的驱动作用显著，太阳辐射的影响相对较弱。气候变化是推动流域植被恢复的主要因素，而生态修复等人类活动措施则有效提升了区域植被的生产力。

关键词(KeyWords)： 净初级生产力(NPP);气候生产潜力(CPP);气候变化;人类活动;渭河流域;影响因素

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金委员会青年科学基金项目(62003313);; 河南省重点研发与推广专项(科技攻关)项目(232102241008)

作者(Author): 潘鹏飞,潘飞燕,张海旭,金裕

DOI: 10.13928/j.cnki.wrahe.2025.04.006

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