Spatiotemporal Differentiation and Trend Analysis of Cultivated Land Productivity in Anhui Province Based on Time Series NPP
[Objective]The temporal and spatial variation of cultivated land productivity in Anhui Province and variation trend was analyzed.[Method]Based on the data set of MOD17A3HGF net primary productivity from 2000 to 2020,the temporal and spatial differentiation charac-teristics and evolution trend of cultivated land NPP in Anhui Province were explored by using the methods of Theil-Sen Median trend analysis,Mann-kedall test,Hurst index and geospatial analysis technology.[Result]In the past 21 years,the NPP of cultivated land in Anhui Province showed a fluctuating increasing trend[0.331 g/(m2·10 a)].In terms of space,NPP of cultivated land mainly showed an increasing trend(93%),and only 7%of that of cultivated land showed a decreasing trend.Compared with 2000-2010,43%of trend change types of the culti-vated land NPP were degraded in 2010-2020,mainly occurred in Chuzhou,Huainan and Bozhou,and 10%of the trend change types of the cultivated land NPP were upgraded,mainly distributed in Hefei,Xuancheng and Wuhu.In the future,75%of the cultivated land NPP in An-hui Province will continue to show an increasing trend,which will be distributed in Hefei,Chuzhou,Lu'an and Suzhou.5%of the cultivated land NPP will show a decreasing trend,which will be still distributed near the urban areas of various cities.20%of the cultivated land NPP trend is uncertain,mainly distributed in most areas of Northern Anhui.[Conclusion]From 2000 to 2020,the NPP of cultivated land in Anhui Prov-ince showed an increasing trend in time and space.The spatial and temporal changes of NPP of cultivated land in cities such as Chuzhou,Huainan and Bozhou were sensitive,while cities such as Hefei,Chuzhou,Lu'an and Suzhou had great potential for cultivated land productivity improvement.
国家科技期刊平台
NSTL
万方数据
维普
