Space Difference Analysis of Cultivated Land Quality Grade in Beijing-Tianjin-Hebei Region
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    Abstract:

    Analyzing the characters of spatial distribution in cultivated land quality of Beijing-Tianjin-Hebei region is important to protect and coordinate the development of regions. The mean grade in each index area was calculated with annual database of 2013 about the cultivated land quality by using the weighted average method. Moreover, the deviation between grades was calculated by mean dichotomy method and grade dispersions in each counties by variance. The results showed that the mean grades were under 8 and the cultivated land qualities were lower than the national average of 9.8. Particularly, the average grade of Beijing was slightly higher than those of Tianjin and Hebei. Physical quality grade deviation was ranged from -3.08 to 4.90, and utilization quality grade was ranged from -5.97 to 5.16, economic quality composition grade was ranged from -5.99 to 4.24.The deviation of cultivated land quality grade for more than 80% of the region was within ±2. The utilization quality grade variance was ranged from 0 to 6.13. The plain areas had large variances and the plateau areas had small changes. The results of space difference analysis showed that the physical quality of cultivated land was slightly better than that of plain areas, but its utilization level and economic efficiency were obviously different. The western mountains area, northern mountains area and Bashang Plateau area had high potential to increase the cultivated lands qualities, although the natural condition and infrastructure should be enhanced. The mean dichotomy was proposed to set cultivated land quality goals after land consolidation. And the variance was put forward to divide land consolidation region, which can be a reference for choosing priority zoning. The research could be referred for well-facilitated farmland construction, improvement of medium or low-yield cultivated land and selection of priority zone.

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History
  • Received:July 04,2016
  • Revised:February 10,2017
  • Adopted:
  • Online: February 10,2017
  • Published: