Mateja Muršec (Author), Jean Leveque (Author)

Abstract

The effect of drip irrigation on the origin and size fraction of soil organic carbon was studied in the soils of an apple orchard (Malus domestica Borkh.) on hilly (20%) terrain in northeastern Slovenia in three slope positions (upslope, midslope and downslope), comparing irrigated with non-irrigated soils. Physical fractionation of soil organic carbon was performed on three soil layers (0–0.05, 0.05–0.15 and 0.15–0.30 m) in three size fractions: fraction A (> 0.0002 m), fraction B (0.0002‒0.00005 m) and fraction C (< 0.00005 m). Fraction A was the richest in soil organic carbon (7.7%), but fraction C was the dominant fraction in the total soil volume (86‒92%), making it the largest source of soil organic carbon (73%). The δ13C signature was performed to determine the existence of two different types (origins) of soil organic carbon: fresh and sedimentary. Fresh organic carbon dominates in the A fraction, while sedimentary organic carbon dominates in the C fraction and may contribute to higher structural stability, besides higher carbonates in the finest fraction. Irrigation mainly contributes to the higher stock of soil organic carbon (predominantly fresh and less sedimentary) in the coarse A fraction (21.14 t/ha in irrigated and 14.17 t/ha in non-irrigated soils).

Keywords

CaCO3;carbon isotopes;drip irrigation;physical fractionation;soil organic matter;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKBV - Faculty of Agriculture
Publisher: Institute of Agricultural Economics and Information
UDC: 631.4
COBISS: 152677891 Link will open in a new window
ISSN: 1801-5395
Views: 30
Downloads: 2
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Other data

Secondary language: Slovenian
Secondary keywords: ogljikovi izotopi;kapljično namakanje;fizikalna frakcionacija;organske snovi v tleh;
Type (COBISS): Scientific work
Pages: str. 81-88
Volume: ǂVol. ǂ18
Issue: ǂNo. ǂ2
Chronology: 2023
DOI: 10.17221/101/2022-SWR
ID: 22778434