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Trade-off and Synergy of Rural Functions Under County Depopulation in the typical black soil region of Northeast China

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Chinese Geographical Science 2023年第4期33卷 616-633页

作者： LI Dongmei WEN Qing QI Yue ZHANG Pingyu Northeast regional Development Research Center Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China School of Public Administration and Law Northeast Agricultural UniversityHarbin 150038China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

As the population continues to shrink in the black soil region of Northeast China since 2000,it is critical to master the impact of population shrinkage on rural functions to realize rural revitalization and sustainable *** this study,we focused on the impacts of depopulation on the evolution and interrelationship of rural *** on the rural function indexes system,the TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution)method,spatial analysis method,and mathematical statistics analysis method were used to summarize the spatial and temporal characteristics of rural function development,as well as the effect of population shrinkage in the typical black soil region of Northeast *** results showed that depopulation varied in the extent and duration between the forested region and plain areas,which both impacted the trajectories of rural subfunctions *** the economic development function and ecological conservation function,the effect of continuous slight depopulation was beneficial,while the effect of rapid depopulation was adverse,which was exactly opposite to the agricultural production *** forms of population shrinkage were conducive to the development of the social security *** the deepening population shrinkage,depopulation mainly promoted the collaborative development between subfunctions in this study,except the relationship between agricultural production and social security *** effects of depopulation on the interrelationship of rural subfunctions varied between the forested region and plain areas in some *** results provided evidence for the cognition that population shrinkage had complicated effects on rural subfunctions.

关键词： rural function depopulation trade-off and synergy typical black soil region Northeast China

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Changes of spring wind erosion based on wind erosion climate factor in the black soil region of Northeast China

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Journal of Mountain Science 2023年第6期20卷 1712-1724页

作者： YAN Ping JI Sheng-tai LI Xiu-fen ZHU Hai-xia WANG Liang-liang ZHAI Mo WANG Ping ZHAO Hui-ying Heilongjiang Institute of Meteorological Sciences Harbin 150030China Innovation and Open Laboratory of Eco-meteorology in Northeast China China Meteorological AdministrationHarbin 150030China Heilongjiang Ecological Meteorological Center Harbin 150030China

The dry and windy climate and low ground cover in spring in the black soil region of Northeast China make the soil strongly affected by wind erosion,which seriously threatens the food security and ecological security of this *** this paper,based on the daily observation data of 124 meteorological stations in study area from 1961 to 2020,seasonal and monthly wind erosion climate factor(C)in spring(March to May)were calculated by using the method proposed by the Food and Agriculture Organization of the United Nations(FAO),the wind erosion characterization in spring were systematically analyzed based on C by various statistical analysis *** results showed that in the past 60 years,spring wind erosion climate factor(CSp)and monthly C of the whole region and each province(region)all showed highly significant decreasing trend,but they began to show rebounded trend in the middle or late *** of the study area showed a significant upward trend since 2008 with an increase of 4.59(10a)^(-1).The main contributors to this upward trend are the changes of C in March and in *** the four provinces(regions),CSp in Heilongjiang,Jilin,Liaoning and eastern Inner Mongolia all showed rebounded since 2008,2011,2008 and 2009,*** rebounded trend of CSp in eastern Inner Mongolia was the most obvious with a tendency rate of 11.27(10a)^(-1),and its mutation occurred after *** rebound trend of CSp in Heilongjiang Province takes the second place,with a trend rate of 4.72(10a)^(-1),but there’s no obvious time mutation *** spatial characteristics of CSpand monthly C are similar,showing decreasing characteristics centered on the typical black soil belt of Northeast *** with 1961-1990,in the period from 1991 to 2020,the proportion of high value areas(CSp>35,monthly C>10)has decreased to varying degrees,while the proportion of low value areas(CSp≤10,monthly C≤4)has *** trends of seasonal and monthly C in 82.2%~87.7%of the

关键词： Wind erosion climate erosivity Spatiotemporal 1characteristics Climate change Rebounded trend typical black soil region Northeast China

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