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- W2373626427 abstract "With increasing population and improving living standards,grain consumption demand in China will continue to grow rigidly,consequently intensify the regional structural contradictions of grain supply. Scientifically dynamic assessment for grain productivity would be able to acquire a good understanding of the present situation of China's grain production capacity,which is important to make the strategy suitable for the development of economy development and food security. Aiming at estimating the grain productivity under different local management strategies and input levers,this paper enhanced the core model of AEZ,set up transaction function between potential grain productivity and grain productivity. The result of dynamic assessment of the nationwide grain production during 2000- 2010 shows,since 2000,although there exists annual fluctuation of the agricultural land productivity,the national average level of grain production experienced a slight increase,with the obvious regional difference. There is a decreasing gradient of grain productivity from the coastal areas to inland,from south to North and from east to west,with obvious change within regions,represented an east to west territorial differentiation,and then the south to north. In the light of regional agricultural productivity analysis,the grain productivity in the eastern coastal region and the southern provinces are higher than inland provinces,while the west regions is lower than the middle and east regions. Compared with the county lever grain production statistics data in2000,2005 and 2010,the correlation coefficient is 0. 82,0. 76 and 0. 89,respectively,and the realistic grain production accounts for69. 4%,73. 4% and 67. 2% of the simulated value,which could be a well reflection of the agricultural land productivity. At last,based on the characteristics of the temporal and spatial variation and local differences in China's grain productivity,as well as eight economic zones in China,grain production security strategies,that in terms of agricultural land protection,agricultural management and input lever improvement,as well as suitable agricultural zoning planing,are proposed to maintain the natural environment and regional social and economic development at the same time,which might provide some references for planning and policy-making to ensure a steady growth of grain productivity." @default.
- W2373626427 created "2016-06-24" @default.
- W2373626427 creator A5086507360 @default.
- W2373626427 date "2013-01-01" @default.
- W2373626427 modified "2023-09-26" @default.
- W2373626427 title "Dynamic Assessment of the Grain Productivity in China Based on the Enhanced Agricultural Ecological Zoning( AEZ) Model" @default.
- W2373626427 hasPublicationYear "2013" @default.
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