本文通过对城市不同时期的扩展及预测分析，及其对区域农业生态环境带来的风险压力变化研究，揭示城市扩展对农业生态风险产生的影响。本研究是以马来西亚雪兰莪州为例，结合相关空间数据和属性数据，基于城市扩展模拟预测模型，完成对研究区城市扩展的预测。然后基于城市扩展下生态风险遥感评价模型，即SERA模型，通过模型具体因子的实现，完成了研究区生态风险压力评价及区域农业用地的生态风险压力评价。结果表明，研究区的农业用地所受风险压力与城市化发展水平相吻合。随着城市的不断扩展，研究区的农业用地所受生态风险不断加剧。基于SERA模型，可以对研究区城市扩展下农业用地风险压力作出很好的分析俄语翻译。

through the analysis of city expansion and prediction in different periods and study on the change of risk and pressure on regional agricultural eco-environment, the paper reveals the influence of city expansion on agricultural ecological risks. The study takes Selangor, Malaysia as the case, combining relevant spatial data and attributes data, based on simulation prediction models of city expansion, and completes the prediction of city expansion in the studied area. Then, based on Remote Sensing Assessment Model of Ecological Risk, namely SERA Model, through the realization of model factors, the paper completes ecological risk and pressure assessment in the studied region as well as ecological risk and pressure assessment on regional agricultural land use. The results showed that the risk and pressure imposed to agricultural land use is consistent with the level of urbanization. With the expanding of urban area, the ecological risk imposed on agricultural land use in the studied area becomes greater. Based on SERA model, the risk and pressure imposed on agricultural land use by city expansion in the studied area can be analyzed well.

城市化加剧引发了一系列的生态环境问题，如土地退化、气候变化等。城市化以空间城市化为主要体现，通过城市的不断扩展，大量占用其它利用类型的土地，造成了对生态环境空间以及资源的掠夺，破坏区域生态环境，同时给区域农业生态带来风险。深入研究城市扩展与区域生态环境的关系，并进一步研究其对农业生态环境带来的风险压力，将为改善农业生态环境，实现农业的可持续发展奠定理论基础翻译公司。

Urbanization worsens and leads to a series of ecological problems, such as land degradation, and climate change, etc. Urbanization is mainly reflected in terms of spatial urbanization. With continued expansion of urban area, much useable land of other types are occupied, resulting in the despoliation of space and resources of ecological environment, destruction of regional ecological environment and regional agro-ecological risks. Depth study on relations between city expansion and regional eco-environment, and further study on the risks and pressure imposed on agricultural ecological environment, will lay the theoretical foundation to improve agricultural ecological environment and realize sustainable development of agriculture.