【摘要】 耕地是土地的精华,是维护国家粮食安全的保障。笔者以景观生态理论为基础,选取分形维数、空间结构稳定性指数、蔓延度指数、香农多样性指数以及香农均匀度指数,对龙海市1998、2007、2013年耕地景观利用现状进行分析。研究结果表明人类社会活动对研究区的耕地景观影响效应既有正向的,也有负向的。研究区耕地景观斑块的规整度提高,耕地景观抗干扰能力增强,耕地的稳定性提升,耕地斑块类型趋于均匀化,但优势斑块的连续性降低和耕地景观的破碎程度增加。在对正向效应土地整理和农业结构调整进行肯定的同时,改善和避免县级土地开发这一负向作用的人类活动。更多还原

【Abstract】 Cultivated land is the essence of land,as well as the guarantee for national food security.Based onthe theory of landscape ecology,the author analyzed the utilization of cultivated land in Longhai City in 1998,2007 and 2013,with the selected indices of fractal dimension,spatial structure stability index,contagionindex,Shannon’s diversity index and Shannon’s evenness index.The research results showed that the effect ofhuman interference on studied cultivated land could be both positive and negative.The regularity of patchesincreased,the antijamming capability and stability of cultivated land were strengthened,the types of cultivatedland patches tended to be homogenization,but the continuity of high quality patches went down and the degreeof crushing increased.It is concluded that while positive effects of land consolidation and structural adjustmentof agriculture should be recognized,county-level land development which is a negative human activity shouldalso be avoided and standardized.更多还原