Cultivated Land Use Zoning Based on Soil Function Evaluation from the Perspective of Black Soil Protection

Rui Zhao, Junying Li, Kening Wu and Long Kang
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Rui Zhao: School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
Junying Li: College of Resources and Environment, Shandong Agricultural University, Taian 271018, China
Kening Wu: School of Land Science and Technology, China University of Geosciences, Beijing 100083, China
Long Kang: School of Land Science and Technology, China University of Geosciences, Beijing 100083, China

Land, 2021, vol. 10, issue 6, 1-29

Abstract: Given that cultivated land serves as a strategic resource to ensure national food security, blind emphasis on improvement of food production capacity can lead to soil overutilization and impair other soil functions. Therefore, we took Heilongjiang province as an example to conduct a multi-functional evaluation of soil at the provincial scale. A combination of soil, climate, topography, land use, and remote sensing data were used to evaluate the functions of primary productivity, provision and cycling of nutrients, provision of functional and intrinsic biodiversity, water purification and regulation, and carbon sequestration and regulation of cultivated land in 2018. We designed a soil function discriminant matrix, constructed the supply-demand ratio, and evaluated the current status of supply and demand of soil functions. Soil functions demonstrated a distribution pattern of high grade in the northeast and low grade in the southwest, mostly in second-level areas. The actual supply of primary productivity functions in 71.32% of the region cannot meet the current needs of the population. The dominant function of soil in 34.89% of the area is water purification and regulation, and most of the cultivated land belongs to the functional balance region. The results presented herein provide a theoretical basis for optimization of land patterns and improvement of cultivated land use management on a large scale, and is of great significance to the sustainable use of black soil resources and improvement of comprehensive benefits.

Keywords: agroecosystems; Heilongjiang province; supply and demand; soil multifunctionality; spatial scales (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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