Urban Agglomeration In The Middle Reach Of Yangtze River Agricultural Economy Spatial Structure Evolution

In this paper, the use of the system spatial structure theory, quantitative geography, GIS spatial analysis and other methods, the middle reaches of the Yangtze River City Group analyzed the structure of the connotation of the agricultural economy of space, the middle reaches of the Yangtze River City Group to build the agricultural economy structure analysis framework space, using this framework, the use of very poor, very ratio, standard deviation, coefficient of variation and the relative weighting rate of development of statistical methods, on the middle reaches of the Yangtze River city group 2004--2014 Nian development throughout the agricultural economy relative and absolute development of econometric analysis carried out, per capita agricultural output, as measured in 2004, in 2014 the middle reaches of the Yangtze River city group spatial difference of agricultural economic development were analyzed using spatial autocorrelation theory, per capita agricultural output as an index of 2004, the 2014 group of agricultural economic structure of the Yangtze River city spatial depth analysis.Through research, the following conclusions:(1) Around the middle reaches of the Yangtze River City Group presents the agricultural economy of urban and rural absolute difference gradually widening, the middle reaches of the Yangtze River City Group relative differences throughout the agricultural economy is still expanding year by year trend.(2) The level of agricultural economic development in space from west to east, there was no significant stepped spatial characteristics, and gradually evolved into the agricultural economy has stepped spatial pattern of gradually decreasing northwest to southeast.2004--2008 Middle Reaches of the Yangtze River City Group the agricultural economy is a typical west to east stage,2014, the middle reaches of the Yangtze River City Group the agricultural economy presents from west to east spatial characteristics to the northwest to southeast transition space features, but did not show a significant core-edge features 2012-2014 Middle Yangtze River city group the agricultural economy has shown more significant northwest to southeast stepped spatial pattern, with a typical core-edge features.(3) The agricultural economy and the overall economic in space showed a larger mismatch. Comprehensive economic Wuhan, Changsha, Jiangxi and three cities in the region of the strongest, but the agricultural economy of less developed or less, Wuhan, Nanchang and even for many years for the agricultural economically backward regions. 2004--2008 Wuhan and Nanchang agricultural economy is backward areas, Changsha developed regions,2010, Wuhan agricultural economy is backward regions, Nanchang, Changsha developed regions,2012, Wuhan, Nanchang agricultural economy of backward regions, Changsha agricultural economy is less developed regions,2014, Wuhan, Nanchang agricultural economy of backward regions, Changsha underdeveloped regions.(4) Showing an overall agricultural economic space gap narrowing trend. In 2004 the level of agricultural economic development presents a typical pyramid structure, developed areas and backward areas the proportion was 12.9%, the proportion was 38.7 per cent less developed regions, less developed regions was 35.5%. In 2014 the proportion of each type of economic development level of agricultural area tends to balance the proportion of developed areas and less developed areas were 22.6%,38.7% share of the underdeveloped areas, the proportion of backward areas is 16.1%.(5) Spatial Agglomeration gradually stabilized. High-high spatial agglomeration characteristics and mainly northeast, indicating a high level of agricultural economy in Northeast agglomeration area 2004-2014 Xiangyang, Yichang, Jingmen agricultural economy has been high-high agglomeration state. Whispered spatial agglomeration characteristics are mainly distributed in the southeast, indicating a low level of agglomeration agricultural economy southeast region.2004--2014 years where Shangrao, Nanchang and Jingdezhen agricultural economy has been low-low agglomeration state.(6) Spatial clustering feature region difference is obvious.2004-- spatial characteristics of the agricultural economy in 2014 by the Western High spatial agglomeration-to gather east Low High-Low Agglomeration is characterized by the gradual evolution of the northeast-southwest Agglomeration Low High-Low Agglomeration Spatial pattern. In 2004, the middle reaches of the Yangtze River City Group the agricultural economy presents Western High Spatial Agglomeration-to gather east Low High-Low Agglomeration characteristics of the central region gather presents jagged features, transitional is not significant. In 2014, the middle reaches of the Yangtze River City Group the agricultural economy spatial agglomeration is characterized by high-high, high-low, low-high, low low spatial concentration from northwest to southeast gradually changing characteristics, with a clear transitional space form is very significant, Agriculture economic polarization was evident.(7) The development of the agricultural economy is the result of many factors. Study found that per capita agricultural machinery power per capita arable land and agricultural economic development has great relevance, indicating that the two have a greater impact on agricultural economic disparities, but per capita GDP, investment intensity, population density and agricultural economic disparities have greater relevance.