Resources Science ›› 2018, Vol. 40 ›› Issue (1): 22-31.doi: 10.18402/resci.2018.01.03

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Basic farmland protection area based on morphological optimization and boundary identification

Zhenglong MU(), Peiji SHI(), Chunfang LIU, Haisong ZHENG   

  1. College of Geography and Environment Science of Northwest Normal University, Lanzhou 730070, China
  • Received:2017-03-27 Revised:2017-10-10 Online:2018-01-20 Published:2018-01-20

Abstract:

Delimitation of basic farmland protection area is an important measure ensuring national crop security and improving comprehensive grain production capacity. However, the 2011 amendments to the “Regulations on the Protection of Basic Farmland” emphasized that high-quality farmland is only included in basic farmland protection areas. It did not make clear requirements for the protection region as well, which contributes to a large number of protected areas, long and obscure boundary lines, virtually increasing the risk of basic farmland being occupied. Therefore, taking country cultivated land in 2015 as an example, we adopted the method of step-by-step multi-factor comprehensive evaluation to optimize the basic farmland protection area based on farmland in Yuzhong County of 2015 and Moran' s I index spatial autocorrelation analysis and GIS. We found that the quality of cultivated land in Yuzhong County is at a moderate level, with an overall amount of 79.76% for high-quality farmland and middle-leveled farmland. High-quality (HH) and low-quality (LH) agglomeration area can be allocated as basic farmland protection area. After boundary identification, 11 designated basic farmland protection areas can be delimitated, with a total area of 75 878.17 hm2 including three plain areas, five hilly areas, and three mountainous areas. Compared with areas before optimization, we reached the goal of completing the overall land use planning to reduce the number of patches when patch unit area increases and the boundary line is shortened and cleared. The landscape pattern is optimized as well. Our research process and methodology provides a reference for the development of relevant work.

Key words: cultivated land quality, spatial agglomeration, basic farmland protection area, boundary recognition, Yuzhong County