Conservation tillage dominates pore formation freeze thaw cycles alleviate compaction in northeast China black soil.

Qinglin Li, Renjie Hou, Zhaoqiang Zhou, Qiang Fu, Tianxiao Li

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In one paragraph

Article in iScience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

5 authors.

Qinglin LiCollege of Hydraulic Science and Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China.

Renjie HouCollege of Hydraulic Science and Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China.

Zhaoqiang ZhouCollege of Hydraulic Science and Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China.

Qiang FuCollege of Hydraulic Science and Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China.

Tianxiao LiCollege of Hydraulic Science and Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Conservation tillage (CT) enhances soil structure, but its interaction with freeze-thaw cycles on micropores remains unclear. This field study compared CT and rotary tillage (RT) by using X-ray computer tomography to analyze soil pore characteristics and physical properties. CT promoted large pores (>500 μm) forming stable preferential flow paths, while RT mainly developed medium-sized pores (200-400 μm). Freeze-thaw cycles increased >300 μm porosity by 5%, particularly in the 20-40 cm layer, an effect influenced by bulk density and freezing duration. Soil pore parameters contributed 35% and 48% to soil nutrients in the 0-20 cm and 20-40 cm layers, respectively. Overall, tillage dominates soil porosity formation, and freeze-thaw cycles play a supplementary role in alleviating compaction. These findings provide practical guidelines for integrating CT with natural freeze-thaw processes to sustain black soil health in cold regions.

Indexed as

conservation tillagemollisolsrotary tillagesoil pore structurex-ray computed tomography

Identifiers

PMID42519011

DOI10.1016/j.isci.2026.116726

PMCPMC13382641

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