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Sustainability 2018, 10(10), 3616; https://doi.org/10.3390/su10103616

Assessment of Cultivated Land Productivity and Its Spatial Differentiation in Dongting Lake Region: A Case Study of Yuanjiang City, Hunan Province

1
The College of Urban & Environmental Sciences, Central China Normal University, Wuhan 430079, China
2
School of Life Sciences, Central China Normal University, Wuhan 430079, China
*
Authors to whom correspondence should be addressed.
Received: 22 August 2018 / Revised: 7 October 2018 / Accepted: 8 October 2018 / Published: 10 October 2018
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Abstract

Cultivated land is an important carrier of grain production, and scientific assessing of cultivated land productivity is of great significance to ensure food security. This paper assessed the overall productivity of cultivated land in Yuanjiang city from the perspectives of quantitative structure, spatial distribution and correlation with national land use. We applied statistical and GIS (geographic information system) spatial analysis methods to 16 secondary indicators of productivity. The results showed that the productivity index of cultivated land ranged from 1642.79 to 4140.09, concentrated in classes 2–6, among the most productive of 15 classes in total. The cultivated productivity indexes of most towns showed quantitative structural patterns of “inverted pyramid” and “dumbbell” types. Cultivated lands with high productivity showed a spatial distribution that decreased from the north to the south and increased from the center to the periphery. The spatial distribution of the higher-level classes in the cultivated land productivity index and the national cultivated land use index was similar. The correlation coefficient between the indexes for cultivated land productivity and the annual standard crop yield was 0.8817, implying that the index reflected local grain production capacity very well. In general, the research offered a reference and technical support for the sustainable use of cultivated land resources and enhanced regional cultivated land production capacity. View Full-Text
Keywords: cultivated land productivity; comprehensive assessment; spatial differentiation; regression analysis; Yuanjiang city cultivated land productivity; comprehensive assessment; spatial differentiation; regression analysis; Yuanjiang city
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Zhao, C.; Zhou, Y.; Li, X.; Xiao, P.; Jiang, J. Assessment of Cultivated Land Productivity and Its Spatial Differentiation in Dongting Lake Region: A Case Study of Yuanjiang City, Hunan Province. Sustainability 2018, 10, 3616.

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