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

doi:10.5814/j.issn.1674-764x.2022.03.006

Abstract

Abstract:

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.

Key words: cultivated land pressure, spatial-temporal differentiation, influencing factors, cold-hot spot analysis, Pearl River-Xijiang Economic Zone

CHEN Shiyin, WU Xuebiao, MA Zhiyu, BIN Jinyou. Analysis of the Spatio-temporal Differentiation of Cultivated Land Pressure in the Pearl River-Xijiang Economic Zone and Its Influencing Factors[J]. Journal of Resources and Ecology, 2022, 13(3): 407-416.

Figures/Tables 8

References 22

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Factor	Correlation coefficient	Factor	Correlation coefficient
GDP (X₁)	0.979	Multiple-crop index (X₅)	0.896
Investment in fixed assets (X₂)	0.987	Grain yield per unit area (X₆)	0.864
Per capita net income of farmers (X₃)	0.973	Proportion of irrigated area (X₇)	-0.412
Population (X₄)	0.995	Per capita cultivated land (X₈)	-0.988

Factor	Correlation coefficient	Factor	Correlation coefficient
GDP (X₁)	0.979	Multiple-crop index (X₅)	0.896
Investment in fixed assets (X₂)	0.987	Grain yield per unit area (X₆)	0.864
Per capita net income of farmers (X₃)	0.973	Proportion of irrigated area (X₇)	-0.412
Population (X₄)	0.995	Per capita cultivated land (X₈)	-0.988

Principal component	Characteristic value	Contribution rate (%)	Cumulative contribution rate (%)
1	5.683	94.710	94.710
2	0.247	4.122	98.832
3	0.057	0.950	99.782
4	0.009	0.157	99.939
5	0.003	0.044	99.983
6	0.001	0.017	100.000

Principal component	Characteristic value	Contribution rate (%)	Cumulative contribution rate (%)
1	5.683	94.710	94.710
2	0.247	4.122	98.832
3	0.057	0.950	99.782
4	0.009	0.157	99.939
5	0.003	0.044	99.983
6	0.001	0.017	100.000

Factor	First principal component	Second principal component
GDP (X₁)	0.832	0.551
Investment in fixed assets (X₂)	0.839	0.543
Per capita net income of farmers (X₃)	0.857	0.506
Population (X₄)	0.829	0.540
Multiple-crop index (X₅)	0.551	0.824
Grain yield per unit area (X₆)	0.514	0.849