The Relationship Between Climate， Phenology， Topography， and Their Combination with Grassland Net Primary Productivity in the Yili Region

doi:10.11733/j.issn.1007-0435.2025.08.019

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (8): 2585-2595.DOI: 10.11733/j.issn.1007-0435.2025.08.019

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The Relationship Between Climate， Phenology， Topography， and Their Combination with Grassland Net Primary Productivity in the Yili Region

GUO Li-yang¹, ZHANG Zhen-zhen², LIU Xiang-yu¹, ZHANG Fei²

1. College of Geography and Remote Sensing Sciences, Xinjiang University, Urumqi, Xinjiang 830017, China;
2. College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, Zhejiang Province 321004, China

Received:2024-06-24 Revised:2024-12-24 Online:2025-08-15 Published:2025-08-27

伊犁地区气候、物候、地形及组合与草地净初级生产力间关系

郭立阳¹, 张振振², 刘翔宇¹, 张飞²

1. 新疆大学地理与遥感科学学院, 新疆乌鲁木齐 830017;
2. 浙江师范大学地理与环境科学学院, 浙江金华 321004

通讯作者: 张飞, E-mail:zhangfei3s@163.com
作者简介:郭立阳(1995-),男,汉族,新疆昌吉人,硕士,主要从事干旱区生态环境遥感应用研究,E-mail:1747640759@stu.xju.edu.cn
基金资助:
新疆维吾尔自治区重点研发任务专项计划（2022B02003）：优质牧草高效生产与加工关键技术集成示范资助

Abstract

Abstract: This study investigated the regulatory mechanisms of carbon sequestration in Yili grassland ecosystems （2001-2020） by integrating vegetation Net Primary Productivity （NPP）， phenological parameters， remote sensing， and meteorological data through the Geodetector model. The results indicated that a non-significant declining trend in annual mean value of grassland NPP. Topography and phenology jointly dominated NPP spatial heterogeneity， with elevation， Length of Season （LOS）， Start of Season （SOS） and End of Season （EOS） consistently identified as the strongest drivers （P<0.01）. Notably， the interaction explanatory power between elevation and phenological parameters exceeded 0.600 in all periods， underscoring topography’s critical role in mediating phenological processes to regulate ecosystem productivity. The study quantitatively deciphered carbon cycle responses in arid mountain ecosystems under climate warming， demonstrated the decisive control of phenology-topography coupling effects on NPP spatial patterns. These findings provide theoretical foundations for precise carbon sink assessment in Northwest China’s ecological barrier regions and offer scientific insights for achieving carbon neutrality goals.

Key words: Net primary productivity, Phenology, The interaction effect, Geographic detector, Remote sensing

摘要： 本研究以植被净初级生产力（Net primary productivity，NPP）和物候参数为核心，集成遥感与气象数据，应用Geodetector模型揭示了2001—2020年伊犁草地生态系统碳固存的调控机制。研究发现，区域草地NPP年均值呈不显著下降趋势。地形与物候因子协同主导NPP空间分异，其中海拔、生长季长度（Length of season，LOS）、生长开始期（Start of season，SOS）和枯黄期（End of season，EOS）始终是影响NPP的最强驱动因子（P<0.01）。高程与物候参数的交互解释力在各时段均超过0.600，凸显地形通过调控物候进程影响生态系统生产力的关键作用。研究定量解析了气候变暖背景下干旱区山地生态系统的碳循环响应机制，证实物候-地形耦合效应对NPP空间格局的决定性影响，为我国西北生态屏障区碳汇精准评估提供了理论支撑，对实现碳中和目标具有重要科学价值。

关键词: 净初级生产力, 物候, 交互作用, 地理探测器, 遥感

CLC Number:

S812

GUO Li-yang, ZHANG Zhen-zhen, LIU Xiang-yu, ZHANG Fei. The Relationship Between Climate， Phenology， Topography， and Their Combination with Grassland Net Primary Productivity in the Yili Region[J]. Acta Agrestia Sinica, 2025, 33(8): 2585-2595.

郭立阳, 张振振, 刘翔宇, 张飞. 伊犁地区气候、物候、地形及组合与草地净初级生产力间关系[J]. 草地学报, 2025, 33(8): 2585-2595.

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The Relationship Between Climate， Phenology， Topography， and Their Combination with Grassland Net Primary Productivity in the Yili Region

伊犁地区气候、物候、地形及组合与草地净初级生产力间关系

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