基于土地利用变化对生态系统服务影响的农业转型技术路径

Technological Path for Agricultural Transformation Based on the Influence of Land Use Change on Ecosystem Service

  • 摘要: 【目的/意义】探索现代农业转型的技术路径,有助于恢复、保护以及可持续的利用我国的土地资源并充分发挥其生态系统服务功能。【方法/过程】运用文献分析法,就土地资源的重要性出发,综述了国内外土地利用及其空间格局变化对生态系统服务功能的影响。【结果/结论】我国的土地利用变化主要特征是从由人类主导的大规模开发模式向开发与保护并行模式转变。总体的态势是表现为以南方水田减少为主导致的耕地面积减少;在东南沿海与内陆地势平坦地区,表现为以占用优质耕地为突出特征的城乡建设用地显著增加;在中西部地区,通过“退耕还林”政策的实施,林地面积呈现增加态势;在东北和西北地区,受气候变迁和比较利益驱动,大量的草地被转化为农田,草地总面积呈现减少态势。研究认为应加强理论研究并实施严格的节约集约用地策略,重视开展高度适应现代农业的生态化转型,构建相适应的综合农业系统模式及其对策研究。

     

    Abstract: 【Objective/Meaning】The exploration of the technological path of modern agricultural transformation is conducive to the restoration,protection and sustainable use of land resources in China and giving full play of its ecosystem service function.【Methods/Procedures】Based on the importance of land resources,the influence of land use and its spatial pattern changes on the ecosystem service function at home and abroad was reviewed by literature analysis.【Results/Conclusions】The main characteristics of land use change in China have changed from the largescale development mode dominated by human beings to the parallel mode of development and protection.The general trend was manifested as the decreases of cultivated land area mainly caused by the decreases of paddy field in south China.In the southeast coastal and inland areas with flat terrain in China,the land used for the urban and rural construction,which was characterized by occupying the high-quality cultivated land,has increased significantly.In the central and western regions of China,through the implementation of the policy of“returning farmland to forest”,the forestland area showed an increasing trend.In northeast China and northwest China,driven by the climate change and comparative interests,a large number of grasslands have been converted into farmland,while the total grassland area has been decreasing in this situation.It was suggested that we should strengthen the theoretical research and implement the strict strategy of economical and intensive land use,and attach importance to carrying out the research work on the ecological transformation of modern agriculture and the construction of an adaptive comprehensive agricultural system model and its countermeasures.

     

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