A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
A large one-time addition of organic soil amendments increased soil macroporosity but did not affect intra-aggregate porosity of a clay soil (2024)

Rasa, K., Tähtikarhu, M., Miettinen, A., Kähärä, T., Uusitalo, R., Mikkola, J., & Hyväluoma, J. (2024). A large one-time addition of organic soil amendments increased soil macroporosity but did not affect intra-aggregate porosity of a clay soil. Soil and Tillage Research, 242, Article 106139. https://doi.org/10.1016/j.still.2024.106139

JYU-tekijät tai -toimittajat

Miettinen, Arttu
Kähärä, Topi

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Rasa, Kimmo; Tähtikarhu, Mika; Miettinen, Arttu; Kähärä, Topi; Uusitalo, Risto; Mikkola, Jarmo; Hyväluoma, Jari

Lehti tai sarja: Soil and Tillage Research

ISSN: 0167-1987

eISSN: 1879-3444

Julkaisuvuosi: 2024

Ilmestymispäivä: 16.05.2024

Volyymi: 242

Artikkelinumero: 106139

Kustantaja: Elsevier

Julkaisumaa: Alankomaat

Julkaisun kieli: englanti

DOI: https://doi.org/10.1016/j.still.2024.106139

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/95212

Julkaisu on rinnakkaistallennettu: http://urn.fi/URN:NBN:fi-fe2024052032986

Tiivistelmä

Soil structure is a dynamic property which controls a wide range of soil functions and is closely linked with soil carbon content. The carbon contents of agricultural soils are subject to several ongoing trends, including declining carbon stocks and attempts to increase the soil carbon reserves. In this study, we aimed to quantify how organic soil amendments, which have been shown to reduce long-term nutrient loads from agricultural fields, can impact soil structure. The structural impacts of a large one-time addition (8 tons carbon per hectare, three different soil amendments) of pulp and paper mill side stream sludges to a boreal clay soil were explored quantitatively in aggregate (X-ray microtomography, sample size 1–2 mm), core (water retention measurements, sample size 195 cm3) and column (macropores ≥80 µm, sample size ∼ 20 dm3) scales. Our results showed no micrometer-scale structural changes within soil aggregates despite the large number (25 aggregate per treatment) of imaged samples. However, the organic soil amendments had a statistically significant impact on the macroporosity. The macroporosity was on average 20–27 % higher compared to the control samples and visible even five years after the application of the amendments. Such change in soil structure improves soil aeration and fast infiltration of water during wet periods and extreme rain events and may thereby also reduce erosion risk by decreasing surface runoff. The increased microporosity was visible only in the column scale. No statistically significant differences were observed in the fraction of large pores in core scale water retention measurements. Probing the soil structural changes in macropore regime by X-ray tomography or developing sub-micron scale analysis methods are recommended approaches to improve our understanding of clay soil’s structural changes induced by organic soil amendments.

YSO-asiasanat: maaperä; savimaat; savi; rakenne (ominaisuudet); huokoisuus; orgaaninen aines; hiilensidonta; tomografia; maaperäfysiikka

Vapaat asiasanat: soil structure; clay soil; organic soil amendments; X-ray tomography; aggregate; helium ion microscope

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

Raportointivuosi: 2024

Alustava JUFO-taso: 2