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[1]Zhang Nali,Tan Tenghui,Guo Zhonglu,et al.Soil quality degradation evaluation of typical farmland in the black soil belt of northeast China[J].Research of Soil and Water Conservation,2025,32(03):130-139.[doi:10.13869/j.cnki.rswc.2025.03.035]

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Soil quality degradation evaluation of typical farmland in the black soil belt of northeast China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 32 Number of periods: 2025 03 Page number: 130-139 Column: Public date: 2025-06-20

Title:: Soil quality degradation evaluation of typical farmland in the black soil belt of northeast China

Author(s):: Zhang Nali¹，Tan Tenghui^1,2，Guo Zhonglu¹，Cai Chongfa¹; （1.Faculty of Resources and Environment, Huazhong Agricultural University, Wuhan 430070; 2.Hubei Fangyuan Dongli Electric Power Science Research Corporation, Wuhan 430000）

Keywords:: soil quality; soil degradation; redundancy analysis; soil depth; northeast black soil belt

CLC:: S152

DOI:: 10.13869/j.cnki.rswc.2025.03.035

Abstract:: [Objective] To explore the degradation of soil indexes and quality in the black soil belt of Northeast China, so as to provide a scientific basis for ensuring the long-term sustainable utilization of black soil resources and the safety of grain production in the black soil belt of Northeast China. [Methods] The typical sloping cultivated lands in the three study areas of Nenjiang, Hailun and Binxian in Heilongjiang Province was sampled and analyzed. The effects of slope positions, soil depth and latitude on soil indicators and quality were analyzed by using four indexes： soil resistance index, soil degradation index, soil quality index and relative soil quality index. [Results] (1) The soil properties of farmland in the three regions were seriously degraded, among which organic matter, total nitrogen and sand particles were strongly affected by disturbance and the degradation degree was the most serious, and the degradation degree of total nitrogen, pH and clay particles was the highest in Binxian and the lowest in Nenjiang, while the soil bulk density and silt particles showed an opposite trend, and the degradation degree of available phosphorus and total potassium was the lowest in Binxian.(2) With the increase of soil depth, the degree of soil quality degradation gradually decreased, which was manifested as the degradation of the soil layer of 0—40 cm and the degradation of the soil layer of 40—120 cm.(3) Through RDA analysis, it was found that soil depth, average annual temperature, average annual precipitation, reclamation years and slope had significant effects on soil indicator degradation and quality degradation, indicating that environmental factors and reclamation years played a decisive role in soil property degradation and quality degradation. [Conclusion] The degradation of soil physical and chemical properties and quality of farmland in the black soil belt of Northeast China is serious. The degree of soil quality degradation gradually increased from north to south, and gradually decreased with the increase of soil depth.

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Last Update: 2025-06-20