Long-Term Contrasting Tillage in Cambisol: Affect on Water-Stable Aggregates, Macropore Network and Soil Agrochemical Properties, Lithuania

25 Pages Posted: 5 Mar 2022

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Abstract

AbstractLong-term field trials are the useful tool to evaluate soil changes in long-term perspective under local soil and climate conditions. The research aimed to quantify the correlations between soil organic carbon (SOC), total nitrogen (Ntotal), total phosphorus (Ptotal), total potassium (Ktotal), soil macropore parameters and water-stable aggregates (WSA) under different tillage application (conventional tillage (CT) and no-tillage (NT) application in Cambisol) from long-term field experiment situated in Central Lithuania.The relationships WSA with medium size macropores (r = 0.72, p < 0.05), fine size macropores (r = 0.83, p < 0.01) and total volume of macroporosity (r = 0.91, p < 0.01) were statistically significant, while the relationships with coarse and very fine size macropores were not. The highest influence of SOC increase was demonstrated under presence of fine size macropores (r = 0.70, p < 0.05) and the volume of total macroporosity (r = 0.73, p < 0.01). The content of Ntotal significantly and positively correlated with many soil factors investigated:  SOC (r = 0.65, p < 0.05), Ptotal (r = 0.65, p < 0.05), fine size macropores (r = 0.75, p < 0.01) and total macroporosity (r = 0.71, p < 0.05), whereas the relationship of Ktotal with SOC was negative. Within the 0-10 cm layer, the SOC and Ntotal positively correlated with WSA (r = 0.81, p < 0.01 and r = 0.68, p < 0.05, respectively). The accumulation of Ptotal in Cambisol positively responded to increase the volume of fine size macropores (r = 0.58, p < 0.05) and total volume of macropores (r = 0.74, p < 0.01). The content of Ptotal positively correlated with WSA (r = 0.62, p < 0.05).Soil agrochemical properties, soil macropore network and water-stable aggregates, averaged across residues and fertilizations were higher in the NT than in the CT.We conclude that SOC, Ntotal and Ptotal had a positive direct effect on the formation of WSA and macropore network in different tillage management in Cambisol under moderate climate conditions.

Keywords: Cambisol, Conventional tillage, No-tillage, X-ray computed tomography, SOC.

Suggested Citation

Kochiieru, Mykola, Long-Term Contrasting Tillage in Cambisol: Affect on Water-Stable Aggregates, Macropore Network and Soil Agrochemical Properties, Lithuania. Available at SSRN: https://ssrn.com/abstract=4050412 or http://dx.doi.org/10.2139/ssrn.4050412

Mykola Kochiieru (Contact Author)

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