珠江-西江经济带耕地压力的时空分异特征及其影响因素分析（英文）

运用耕地压力指数、变异系数、冷热点分析等方法分析了2008–2017年间珠江–西江经济带县域耕地压力的时空分异格局及其动态变化过程，并运用主成分分析方法对耕地压力影响因素进行测度。研究结果表明：研究期内珠江–西江经济带耕地压力一直处在“高压”状态，耕地压力指数呈持续上升趋势；珠江–西江经济带及各地级市耕地压力指数的变异系数均呈波动上升态势，区域内耕地压力总体空间差异不断扩大，两极分化明显,其中省会城市市辖区所在区域作为城市发展的核心区，同时也是耕地压力最大的区域；珠江–西江经济带耕地压力冷热点空间格局分异明显，其中珠江经济带为主要的热点集聚区，西江经济带则为主要的冷点集聚区；农民收入、固定资产投资、GDP、人口等社会经济因素是影响珠江–西江经济带耕地压力变动的主要驱动因素。除此之外，复种指数、粮食单产水平等耕作生产因素也会对耕地的压力变动产生重要影响。

Analysis of the Spatio-temporal Differentiation of Cultivated Land Pressure in the Pearl River-Xijiang Economic Zone and Its Influencing Factors

Cultivated land pressure is often used to reflect the shortage of cultivated land resources. By using the methods of the Cultivated Land Pressure Index, coefficient of variation and cold-hot spot analysis, this paper analyzes the spatial-temporal differentiation pattern and dynamic change processes of cultivated land pressure in the counties of the Pearl River-Xijiang Economic Zone from 2008 to 2017, and measures the factors which influence cultivated land pressure by using Principal Component Analysis. The results show that the cultivated land pressure in the Pearl River-Xijiang Economic Zone has been in a “high pressure” state, and the Cultivated Land Pressure Index has been rising continuously from 2008 to 2017. The coefficient of variation of the Cultivated Land Pressure Index in the Pearl River-Xijiang Economic Zone and various prefecture-level cities is fluctuating and rising, which indicates that the overall spatial differences in the cultivated land pressure in this region are expanding and polarization is obvious. In addition, the area where the municipal district of the provincial capital city is located is the core area of urban development and also the area with the greatest cultivated land pressure. The spatial pattern of cultivated land pressure cold-hot spots in the Pearl River-Xijiang Economic Zone is obviously heterogeneous, in which the Pearl River Economic Zone is the main hot spot gathering area and the Xijiang Economic Zone is the main cold spot gathering area. Farmers' income, investment in fixed assets, GDP, population and other socio-economic factors are the main factors driving the changes in the cultivated land pressure in the Pearl River-Xijiang Economic Zone. Furthermore, farming production factors, such as the multiple cropping index and grain yield per unit area, will also have an important impact on the changes in the cultivated land pressure.