山西省耕地NPP时空变化及其气候因子驱动分析  

Spatial-temporal Variation of Farmland NPP and Climate Factor-driven Analysis in Shanxi Province

作　　者：杨改强[1] 张志强[1] 辛鑫 霍丽娟[1] 郭栋鹏[1] YANG Gai-qiang;ZHANG Zhi-qiang;XIN Xin;HUO Li-juan;GUO Dong-peng(School of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学环境与资源学院,太原030024

出　　处：《科学技术与工程》2023年第24期10557-10567,共11页Science Technology and Engineering

基　　金：国家自然科学基金(51709195,41807130,U21A20524);山西省科技合作交流专项(202204041101018);山西省科技创新人才团队专项(202204051002026);山西省基础研究计划(20210302123213)。

摘　　要：近年来,山西省退耕还林(草)和城镇化进程使耕地净初级生产力发生了较大变化,研究山西省耕地植被净初级生产力(net primary productivity,NPP)的变化趋势对耕地资源的合理开发与可持续利用有重要意义。基于ArcGIS、ENVI软件,利用时间序列土地利用类型和MOD17A3植被净初级生产力(net primary productivity,NPP)产品数据集,采用Sen斜率估计趋势分析法和Mann-Kendall显著性检验法等分析方法对2000—2020年山西省耕地NPP的时空变化、稳定性及其气候驱动力进行分析。结果表明:2000—2020年山西省耕地NPP整体呈波动上升趋势,2000—2010年的增长趋势[增长率为7.46 g C/(m~2·a)]高于2010—2020年[增长率为6.63 g C/(m~2·a)];山西省耕地NPP呈现南高北低、东高西低的分布,80.4%的耕地NPP值介于200~400 g C/(m~2·a),集中分布在山西省的中部和南部地区;2000—2020年耕地NPP平均值与降水、气温均呈正相关关系。In recent years,the process of returning farmland to forests(grass) and urbanization have changed net primary productivity(NPP) of farmland in Shanxi Province.It is of great significance to study the trend of NPP of farmland in Shanxi Province for rational development and sustainable utilization of farmland resources.The spatial-temporal variation,stability and climate driving force of NPP of farmland in Shanxi Province from 2000 to 2020 were analyzed,based on ArcGIS and ENVI by time series analysis of land use classification and MODIS NPP product(MOD17A3) datasets,and analytical methods such as Sen's slope estimator and Mann-Kendall trend test.The results show that there is a fluctuating upward trend from 2000 to 2020,and the increase rate from 2000 to 2010 [the growth rate is 7.46 g C/(m~2·a)] is higher than that from 2010 to 2020 [the growth rate is 6.63 g C/(m~2·a)].NPP of cultivated land in Shanxi Province has a distribution pattern of high in the south and the east,and low in the north and the west.80.4% of NPP values has a range from 200 to 400 g C/(m~2·a),which were concentrated in the central and southern areas of Shanxi Province.Mean NPP of farmland was positively correlated with precipitation and temperature during 2000—2020.

关 键 词：山西省 耕地生产力 趋势分析 MODIS 气候因子 

分 类 号：X171.3[环境科学与工程—环境科学]