河南省植被NPP时空变化特征及其驱动因素

Spatiotemporal variations characteristics and driving factors of vegetation NPP in Henan Province

针对河南省人类活动和自然因素对区内生态文明建设和未来发展趋势影响的问题,该文基于多源数据,采用趋势分析、变异系数等方法,探究2000—2021年河南省植被净初级生产力(NPP)时空变化及驱动因素。实验结果得出,区内年均植被NPP在时间上呈现缓慢增加的趋势,空间上呈现出南高北低;省内林地类型的植被NPP最高,中等稳定区占全省面积的57.78%,未来持续改善区域面积占比87.85%;不同土地利用类型下植被NPP理论值与实际值残差整体呈现出增长的趋势,人类活动对不同土地利用类型植被NPP呈现出促进作用;自然因素中降水是影响植被NPP的主要因素。整体而言,河南省植被NPP受降雨和人类活动影响呈现出逐渐改善的趋势,并将在未来持续。

In response to the impact of human activities and natural factors on the construction of ecological civilization and future development trends in Henan Province,the multi-source data,trend analysis,coefficient of variation,and other methods were used to explore the spatiotemporal changes and driving factors of vegetation NPP in Henan Province from 2000 to 2021 in this paper.It was concluded that the average annual vegetation NPP in the region showed a slow increasing trend in time and a high in the south and low in the north in space;The vegetation NPP of forest land types in the province was the highest,with moderately stable areas accounting for 57.78%of the province's area,and areas for continuous improvement accounting for 87.85%in the future;The residual between theoretical and actual NPP values of vegetation under different land use types showed an overall increasing trend,and human activities had a promoting effect on NPP of vegetation under different land use types;Precipitation was the main factor affecting vegetation NPP among natural factors.Overall,the vegetation NPP in Henan Province was gradually improving due to the influence of rainfall and human activities,and will continue to improve in the future.