Analysis Of Spatial Pattern Of The Intensive Utilization Of Cultivated Land And Its Impact Factors In The Beijing-Tianjin-Hebei Region

With the rapid development of economy and urbanization in China, the pressure of economy and population to cultivated land is increasing and the contradiction between the decreasing cultivated land and the increasing agricultural products demand is sharpening. Under the condition of the reserved land resources suitable for cultivation being more and more limited, improving the level of intensive utilization of cultivated land is an inevitable choice to ensure the development of economy and society and guarantee the supply safety of the agricultural products. The analysis of spatial pattern of cultivated land intensive use is always the hot topic for scholars and the existing research mostly focused on the analysis of spatial difference feature and the reveal of temporal and spatial variation rules, so the research about the analysis of the influencing factors of the spatial pattern needs to be further. The Beijing-Tianjin-Hebei region is one of the main grain production areas in China, in which the differences of resource endowments and the stage of economic development makes the agricultural production present remarkable regional characteristics and the level of cultivated land intensive use show a regional differentiation. Based on this, this article analyzes the utilization status and the differences of spatial pattern of the cultivated land in Beijing-Tianjin-Hebei region by using the TOPSIS model, variation coefficient method, and Geo DA exploratory spatial data analysis method from the perspective of man-land relationship; on the basis, the influencing factors and influencing ability for the existing spatial pattern are clear by introducing Geographical Detector model. The conclusions are as follows:(1) The average intensive degree of cultivated land in Beijing-Tianjin-Hebei region was 0.1632 in 2011,in which 54.7% of the county was lower than the regional average; the differences among regions were significant, which presented the stepwise distribution characteristics– " high in central-south and low in northwest " and " high in plains and low in mountain and hilly areas".(2) In 2011,the global Moran’s I of intensive use level of the cultivated land in Beijing-Tianjin-Hebei region was 0.3507,which showed spatial agglomeration was in the moderate degree and the spatial positive correlation at the 99.9% confidence level. And the H-H "hot spots" were mainly distributed in 9 counties which located in the plains of Taihang Mountain and south-central of Hebei province, and the diffusion effect in high value areas were not significant; L-L "cold spot" areas were mainly distributed in 21 counties which located in north mountains of Hebei province, bashang plateau and basins of northwest Hebei mountains, where are the key areas in the future to improve the level of the intensive use.(3) From the overall regional perspective, the core factors that impact the spatial pattern of the intensive use of cultivated land are elevation, traffic, the sustainability of resource and slope, and respectively the influencing ability values are 18.22%, 16.14%, 14.51% and 14.02%. In terms of provinces: the core factors that impact the spatial pattern of cultivated land intensive use are different---the factors in Beijing are traffic, slope, the sustainability of resource and elevation, which make up 17.27%, 16.79%, 15.14% and 14.90% respectively of the whole; the factors in Tianjin are population urbanization, traffic and the sustainability of resource, which account for 23.88%,15.93% and 12.21% respectively, and the population urbanization has a distinctly decisive influence; the major influencing factors in Hebei province are elevation, traffic, the sustainability of resource and slope, which account for 17.87%, 16.42% 14.10% and 13.59% respectively. Apparently the dominant factors on the spatial pattern of intensive use of cultivated land in different regions are different. Therefore, the differential management and control strategy for cultivated land use is inevitable. And apply advanced experience according to local conditions, through the management of farmland, acceleration in the land circulation, promoting the rural road network construction and so forth to increase the level of cultivated land intensive use in different areas and reduce regional differences. Thus, the highlighted contradictory of man-land can be resolved and the intensive use of cultivated land can be given a boost in the Beijing-Tianjin-Hebei region. The results can provide scientific clues for subsequent research in related fields, and provide a decision-making basis to formulate differential measures to improve the level of intensive use of cultivated land.